using System.Reflection.Emit;
using System.Text;
- /// <summary>
- /// This is just a helper class, it is generated by Unary, UnaryMutator
- /// when an overloaded method has been found. It just emits the code for a
- /// static call.
- /// </summary>
- public class StaticCallExpr : ExpressionStatement {
- ArrayList args;
- MethodInfo mi;
+ //
+ // This is an user operator expression, automatically created during
+ // resolve phase
+ //
+ public class UserOperatorCall : Expression {
+ public delegate Expression ExpressionTreeExpression (EmitContext ec, MethodGroupExpr mg);
- public StaticCallExpr (MethodInfo m, ArrayList a, Location l)
+ readonly ArrayList arguments;
+ readonly MethodGroupExpr mg;
+ readonly ExpressionTreeExpression expr_tree;
+
+ public UserOperatorCall (MethodGroupExpr mg, ArrayList args, ExpressionTreeExpression expr_tree, Location loc)
{
- mi = m;
- args = a;
+ this.mg = mg;
+ this.arguments = args;
+ this.expr_tree = expr_tree;
- type = m.ReturnType;
+ type = TypeManager.TypeToCoreType (((MethodInfo) mg).ReturnType);
eclass = ExprClass.Value;
- loc = l;
+ this.loc = loc;
+ }
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ if (expr_tree != null)
+ return expr_tree (ec, mg);
+
+ ArrayList args = new ArrayList (arguments.Count + 1);
+ args.Add (new Argument (new NullLiteral (loc).CreateExpressionTree (ec)));
+ args.Add (new Argument (mg.CreateExpressionTree (ec)));
+ foreach (Argument a in arguments) {
+ args.Add (new Argument (a.Expr.CreateExpressionTree (ec)));
+ }
+
+ return CreateExpressionFactoryCall ("Call", args);
}
public override Expression DoResolve (EmitContext ec)
public override void Emit (EmitContext ec)
{
- if (args != null)
- Invocation.EmitArguments (ec, mi, args, false, null);
-
- ec.ig.Emit (OpCodes.Call, mi);
- return;
+ mg.EmitCall (ec, arguments);
}
-
- static public StaticCallExpr MakeSimpleCall (EmitContext ec, MethodGroupExpr mg,
+
+ [Obsolete ("It may not be compatible with expression trees")]
+ static public UserOperatorCall MakeSimpleCall (EmitContext ec, MethodGroupExpr mg,
Expression e, Location loc)
{
ArrayList args;
return null;
args.Add (a);
- mg = mg.OverloadResolve (ec, args, false, loc);
+ mg = mg.OverloadResolve (ec, ref args, false, loc);
if (mg == null)
return null;
- return new StaticCallExpr ((MethodInfo) mg, args, loc);
+ return new UserOperatorCall (mg, args, null, loc);
}
- public override void EmitStatement (EmitContext ec)
- {
- Emit (ec);
- if (TypeManager.TypeToCoreType (type) != TypeManager.void_type)
- ec.ig.Emit (OpCodes.Pop);
- }
-
- public MethodInfo Method {
- get { return mi; }
+ public MethodGroupExpr Method {
+ get { return mg; }
}
}
}
}
- /// <summary>
- /// Unary expressions.
- /// </summary>
- ///
- /// <remarks>
- /// Unary implements unary expressions. It derives from
- /// ExpressionStatement becuase the pre/post increment/decrement
- /// operators can be used in a statement context.
- /// </remarks>
+ //
+ // Unary implements unary expressions.
+ //
public class Unary : Expression {
public enum Operator : byte {
UnaryPlus, UnaryNegation, LogicalNot, OnesComplement,
Type expr_type = Expr.Type;
string op_name = oper_names [(int) Oper];
- Expression mg = MemberLookup (ec.ContainerType, expr_type, op_name, MemberTypes.Method, AllBindingFlags, loc);
- if (mg != null) {
- Expression e = StaticCallExpr.MakeSimpleCall (
- ec, (MethodGroupExpr) mg, Expr, loc);
+ MethodGroupExpr user_op = MemberLookup (ec.ContainerType, expr_type, op_name, MemberTypes.Method, AllBindingFlags, loc) as MethodGroupExpr;
+ if (user_op != null) {
+ ArrayList args = new ArrayList (1);
+ args.Add (new Argument (Expr));
+ user_op = user_op.OverloadResolve (ec, ref args, false, loc);
- if (e == null){
+ if (user_op == null) {
Error23 (expr_type);
return null;
}
-
- return e;
+
+ return new UserOperatorCall (user_op, args, CreateExpressionTree, loc);
}
switch (Oper){
return null;
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ return CreateExpressionTree (ec, null);
+ }
+
+ Expression CreateExpressionTree (EmitContext ec, MethodGroupExpr user_op)
+ {
+ string method_name;
+ switch (Oper) {
+ case Operator.UnaryNegation:
+ method_name = "Negate";
+ break;
+ case Operator.LogicalNot:
+ method_name = "Not";
+ break;
+ default:
+ throw new InternalErrorException ("Unknown unary operator " + Oper.ToString ());
+ }
+
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (Expr.CreateExpressionTree (ec)));
+ if (user_op != null)
+ args.Add (new Argument (user_op.CreateExpressionTree (ec)));
+ return CreateExpressionFactoryCall (method_name, args);
+ }
+
public override Expression DoResolve (EmitContext ec)
{
if (Oper == Operator.AddressOf) {
public override void Emit (EmitContext ec)
{
ILGenerator ig = ec.ig;
-
+
switch (Oper) {
case Operator.UnaryPlus:
throw new Exception ("This should be caught by Resolve");
}
}
- public override void EmitBranchable (EmitContext ec, Label target, bool onTrue)
+ public override void EmitBranchable (EmitContext ec, Label target, bool on_true)
{
if (Oper == Operator.LogicalNot)
- Expr.EmitBranchable (ec, target, !onTrue);
+ Expr.EmitBranchable (ec, target, !on_true);
else
- base.EmitBranchable (ec, target, onTrue);
+ base.EmitBranchable (ec, target, on_true);
}
public override string ToString ()
//
// This is expensive for the simplest case.
//
- StaticCallExpr method;
+ UserOperatorCall method;
public UnaryMutator (Mode m, Expression e, Location l)
{
(t == TypeManager.int64_type) ||
(t == TypeManager.uint64_type) ||
(t == TypeManager.char_type) ||
- (t.IsSubclassOf (TypeManager.enum_type)) ||
+ (TypeManager.IsSubclassOf (t, TypeManager.enum_type)) ||
(t == TypeManager.float_type) ||
(t == TypeManager.double_type) ||
(t.IsPointer && t != TypeManager.void_ptr_type);
mg = MemberLookup (ec.ContainerType, expr_type, op_name, MemberTypes.Method, AllBindingFlags, loc);
if (mg != null) {
- method = StaticCallExpr.MakeSimpleCall (
+ method = UserOperatorCall.MakeSimpleCall (
ec, (MethodGroupExpr) mg, expr, loc);
type = method.Type;
if (expr == null)
return null;
} else {
- if (expr.eclass == ExprClass.Value) {
- Error_ValueAssignment (loc);
- } else {
- expr.Error_UnexpectedKind (ec.DeclContainer, "variable, indexer or property access", loc);
- }
+ Report.Error (1059, loc, "The operand of an increment or decrement operator must be a variable, property or indexer");
return null;
}
return ResolveOperator (ec);
}
- static int PtrTypeSize (Type t)
- {
- return GetTypeSize (TypeManager.GetElementType (t));
- }
-
//
// Loads the proper "1" into the stack based on the type, then it emits the
// opcode for the operation requested
else if (t == TypeManager.float_type)
ig.Emit (OpCodes.Ldc_R4, 1.0F);
else if (t.IsPointer){
- int n = PtrTypeSize (t);
+ Type et = TypeManager.GetElementType (t);
+ int n = GetTypeSize (et);
if (n == 0)
- ig.Emit (OpCodes.Sizeof, t);
+ ig.Emit (OpCodes.Sizeof, et);
else
IntConstant.EmitInt (ig, n);
} else
if (method == null)
LoadOneAndEmitOp (ec, expr.Type);
else
- ec.ig.Emit (OpCodes.Call, method.Method);
+ ec.ig.Emit (OpCodes.Call, (MethodInfo)method.Method);
recurse = false;
return;
}
if (expr == null)
return null;
- if (expr.Type.IsPointer) {
- Report.Error (244, loc, "\"is\" or \"as\" are not valid on pointer types");
+ if (expr.Type.IsPointer || probe_type_expr.Type.IsPointer) {
+ Report.Error (244, loc, "The `{0}' operator cannot be applied to an operand of pointer type",
+ OperatorName);
+ return null;
+ }
+
+ if (expr.Type == TypeManager.anonymous_method_type) {
+ Report.Error (837, loc, "The `{0}' operator cannot be applied to a lambda expression or anonymous method",
+ OperatorName);
return null;
}
+
return this;
}
+ protected abstract string OperatorName { get; }
+
protected override void CloneTo (CloneContext clonectx, Expression t)
{
Probe target = (Probe) t;
: base (expr, probe_type, l)
{
}
-
- enum Action {
- AlwaysTrue, AlwaysNull, AlwaysFalse, LeaveOnStack, Probe
- }
-
- Action action;
public override void Emit (EmitContext ec)
{
ILGenerator ig = ec.ig;
expr.Emit (ec);
-
- switch (action){
- case Action.AlwaysFalse:
- ig.Emit (OpCodes.Pop);
- IntConstant.EmitInt (ig, 0);
- return;
- case Action.AlwaysTrue:
- ig.Emit (OpCodes.Pop);
- IntConstant.EmitInt (ig, 1);
- return;
- case Action.LeaveOnStack:
- // the `e != null' rule.
- ig.Emit (OpCodes.Ldnull);
- ig.Emit (OpCodes.Ceq);
- ig.Emit (OpCodes.Ldc_I4_0);
- ig.Emit (OpCodes.Ceq);
- return;
- case Action.Probe:
- ig.Emit (OpCodes.Isinst, probe_type_expr.Type);
- ig.Emit (OpCodes.Ldnull);
- ig.Emit (OpCodes.Cgt_Un);
- return;
- }
- throw new Exception ("never reached");
+ ig.Emit (OpCodes.Isinst, probe_type_expr.Type);
+ ig.Emit (OpCodes.Ldnull);
+ ig.Emit (OpCodes.Cgt_Un);
}
- public override void EmitBranchable (EmitContext ec, Label target, bool onTrue)
+ public override void EmitBranchable (EmitContext ec, Label target, bool on_true)
{
ILGenerator ig = ec.ig;
- switch (action){
- case Action.AlwaysFalse:
- if (! onTrue)
- ig.Emit (OpCodes.Br, target);
-
- return;
- case Action.AlwaysTrue:
- if (onTrue)
- ig.Emit (OpCodes.Br, target);
-
- return;
- case Action.LeaveOnStack:
- // the `e != null' rule.
- expr.Emit (ec);
- ig.Emit (onTrue ? OpCodes.Brtrue : OpCodes.Brfalse, target);
- return;
- case Action.Probe:
- expr.Emit (ec);
- ig.Emit (OpCodes.Isinst, probe_type_expr.Type);
- ig.Emit (onTrue ? OpCodes.Brtrue : OpCodes.Brfalse, target);
- return;
- }
- throw new Exception ("never reached");
+ expr.Emit (ec);
+ ig.Emit (OpCodes.Isinst, probe_type_expr.Type);
+ ig.Emit (on_true ? OpCodes.Brtrue : OpCodes.Brfalse, target);
}
- public override Expression DoResolve (EmitContext ec)
+ Expression CreateConstantResult (bool result)
{
- Expression e = base.DoResolve (ec);
+ if (result)
+ Report.Warning (183, 1, loc, "The given expression is always of the provided (`{0}') type",
+ TypeManager.CSharpName (probe_type_expr.Type));
+ else
+ Report.Warning (184, 1, loc, "The given expression is never of the provided (`{0}') type",
+ TypeManager.CSharpName (probe_type_expr.Type));
+
+ return new BoolConstant (result, loc);
+ }
- if ((e == null) || (expr == null))
+ public override Expression DoResolve (EmitContext ec)
+ {
+ if (base.DoResolve (ec) == null)
return null;
- Type etype = expr.Type;
+ Type d = expr.Type;
+ bool d_is_nullable = false;
+
+ if (expr is Constant) {
+ //
+ // If E is a method group or the null literal, of if the type of E is a reference
+ // type or a nullable type and the value of E is null, the result is false
+ //
+ if (expr.IsNull)
+ return CreateConstantResult (false);
+ } else if (TypeManager.IsNullableType (d) && !TypeManager.ContainsGenericParameters (d)) {
+ d = TypeManager.GetTypeArguments (d) [0];
+ d_is_nullable = true;
+ }
+
type = TypeManager.bool_type;
eclass = ExprClass.Value;
+ Type t = probe_type_expr.Type;
+ bool t_is_nullable = false;
+ if (TypeManager.IsNullableType (t) && !TypeManager.ContainsGenericParameters (t)) {
+ t = TypeManager.GetTypeArguments (t) [0];
+ t_is_nullable = true;
+ }
- //
- // First case, if at compile time, there is an implicit conversion
- // then e != null (objects) or true (value types)
- //
- Type probe_type = probe_type_expr.Type;
- e = Convert.ImplicitConversionStandard (ec, expr, probe_type, loc);
- if (e != null){
- expr = e;
- if (etype.IsValueType)
- action = Action.AlwaysTrue;
- else
- action = Action.LeaveOnStack;
-
- Constant c = e as Constant;
- if (c != null && c.GetValue () == null) {
- action = Action.AlwaysFalse;
- Report.Warning (184, 1, loc, "The given expression is never of the provided (`{0}') type",
- TypeManager.CSharpName (probe_type));
- } else if (etype.IsValueType) {
- Report.Warning (183, 1, loc, "The given expression is always of the provided (`{0}') type",
- TypeManager.CSharpName (probe_type));
+ if (t.IsValueType) {
+ if (d == t) {
+ //
+ // D and T are the same value types but D can be null
+ //
+ if (d_is_nullable && !t_is_nullable)
+ return Nullable.HasValue.Create (expr, ec);
+
+ //
+ // The result is true if D and T are the same value types
+ //
+ return CreateConstantResult (true);
}
- return this;
- }
-
- if (Convert.ExplicitReferenceConversionExists (etype, probe_type)){
- if (TypeManager.IsGenericParameter (etype))
- expr = new BoxedCast (expr, etype);
+
+ if (TypeManager.IsGenericParameter (d))
+ return ResolveGenericParameter (t, d);
//
- // Second case: explicit reference convresion
+ // An unboxing conversion exists
//
- if (expr is NullLiteral)
- action = Action.AlwaysFalse;
- else
- action = Action.Probe;
- } else if (TypeManager.ContainsGenericParameters (etype) ||
- TypeManager.ContainsGenericParameters (probe_type)) {
- expr = new BoxedCast (expr, etype);
- action = Action.Probe;
+ if (Convert.ExplicitReferenceConversionExists (d, t))
+ return this;
} else {
- action = Action.AlwaysFalse;
- if (!(probe_type.IsInterface || expr.Type.IsInterface))
- Report.Warning (184, 1, loc, "The given expression is never of the provided (`{0}') type", TypeManager.CSharpName (probe_type));
+ if (TypeManager.IsGenericParameter (t))
+ return ResolveGenericParameter (d, t);
+
+ if (d.IsValueType) {
+ bool temp;
+ if (Convert.ImplicitBoxingConversionExists (expr, t, out temp))
+ return CreateConstantResult (true);
+ } else {
+ if (TypeManager.IsGenericParameter (d))
+ return ResolveGenericParameter (t, d);
+
+ if (TypeManager.ContainsGenericParameters (d))
+ return this;
+
+ if (Convert.ImplicitReferenceConversionExists (expr, t) ||
+ Convert.ExplicitReferenceConversionExists (d, t)) {
+ return this;
+ }
+ }
}
+ return CreateConstantResult (false);
+ }
+
+ Expression ResolveGenericParameter (Type d, Type t)
+ {
+#if GMCS_SOURCE
+ GenericConstraints constraints = TypeManager.GetTypeParameterConstraints (t);
+ if (constraints != null) {
+ if (constraints.IsReferenceType && d.IsValueType)
+ return CreateConstantResult (false);
+
+ if (constraints.IsValueType && !d.IsValueType)
+ return CreateConstantResult (false);
+ }
+
+ expr = new BoxedCast (expr, d);
return this;
+#else
+ return null;
+#endif
+ }
+
+ protected override string OperatorName {
+ get { return "is"; }
}
}
Type etype = expr.Type;
if (type.IsValueType && !TypeManager.IsNullableType (type)) {
- Report.Error (77, loc, "The as operator must be used with a reference type (`" +
- TypeManager.CSharpName (type) + "' is a value type)");
+ Report.Error (77, loc, "The `as' operator cannot be used with a non-nullable value type `{0}'",
+ TypeManager.CSharpName (type));
return null;
}
}
}
#endif
-
+ if (expr.IsNull && TypeManager.IsNullableType (type)) {
+ Report.Warning (458, 2, loc, "The result of the expression is always `null' of type `{0}'",
+ TypeManager.CSharpName (type));
+ }
+
Expression e = Convert.ImplicitConversion (ec, expr, type, loc);
if (e != null){
expr = e;
Error_CannotConvertType (etype, type, loc);
return null;
}
+
+ protected override string OperatorName {
+ get { return "as"; }
+ }
- public override bool GetAttributableValue (Type valueType, out object value)
+ public override bool GetAttributableValue (Type value_type, out object value)
{
- return expr.GetAttributableValue (valueType, out value);
+ return expr.GetAttributableValue (value_type, out value);
}
}
target.expr = expr.Clone (clonectx);
}
}
+
+ //
+ // C# 2.0 Default value expression
+ //
+ public class DefaultValueExpression : Expression
+ {
+ Expression expr;
- /// <summary>
- /// Binary operators
- /// </summary>
- public class Binary : Expression {
- public enum Operator : byte {
- Multiply, Division, Modulus,
- Addition, Subtraction,
- LeftShift, RightShift,
- LessThan, GreaterThan, LessThanOrEqual, GreaterThanOrEqual,
- Equality, Inequality,
- BitwiseAnd,
- ExclusiveOr,
- BitwiseOr,
- LogicalAnd,
- LogicalOr,
- TOP
+ public DefaultValueExpression (Expression expr, Location loc)
+ {
+ this.expr = expr;
+ this.loc = loc;
}
- readonly Operator oper;
- protected Expression left, right;
- readonly bool is_compound;
-
- // This must be kept in sync with Operator!!!
- public static readonly string [] oper_names;
-
- static Binary ()
+ public override Expression CreateExpressionTree (EmitContext ec)
{
- oper_names = new string [(int) Operator.TOP];
-
- oper_names [(int) Operator.Multiply] = "op_Multiply";
- oper_names [(int) Operator.Division] = "op_Division";
- oper_names [(int) Operator.Modulus] = "op_Modulus";
- oper_names [(int) Operator.Addition] = "op_Addition";
- oper_names [(int) Operator.Subtraction] = "op_Subtraction";
- oper_names [(int) Operator.LeftShift] = "op_LeftShift";
- oper_names [(int) Operator.RightShift] = "op_RightShift";
- oper_names [(int) Operator.LessThan] = "op_LessThan";
- oper_names [(int) Operator.GreaterThan] = "op_GreaterThan";
- oper_names [(int) Operator.LessThanOrEqual] = "op_LessThanOrEqual";
- oper_names [(int) Operator.GreaterThanOrEqual] = "op_GreaterThanOrEqual";
- oper_names [(int) Operator.Equality] = "op_Equality";
- oper_names [(int) Operator.Inequality] = "op_Inequality";
- oper_names [(int) Operator.BitwiseAnd] = "op_BitwiseAnd";
- oper_names [(int) Operator.BitwiseOr] = "op_BitwiseOr";
- oper_names [(int) Operator.ExclusiveOr] = "op_ExclusiveOr";
- oper_names [(int) Operator.LogicalOr] = "op_LogicalOr";
- oper_names [(int) Operator.LogicalAnd] = "op_LogicalAnd";
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (this));
+ args.Add (new Argument (new TypeOf (new TypeExpression (type, loc), loc)));
+ return CreateExpressionFactoryCall ("Constant", args);
}
- public Binary (Operator oper, Expression left, Expression right, bool isCompound)
- : this (oper, left, right)
+ public override Expression DoResolve (EmitContext ec)
{
- this.is_compound = isCompound;
+ TypeExpr texpr = expr.ResolveAsTypeTerminal (ec, false);
+ if (texpr == null)
+ return null;
+
+ type = texpr.Type;
+
+ if (type == TypeManager.void_type) {
+ Error_VoidInvalidInTheContext (loc);
+ return null;
+ }
+
+ if (TypeManager.IsGenericParameter (type)) {
+ GenericConstraints constraints = TypeManager.GetTypeParameterConstraints(type);
+ if (constraints != null && constraints.IsReferenceType)
+ return new EmptyConstantCast (new NullLiteral (Location), type);
+ } else {
+ Constant c = New.Constantify (type);
+ if (c != null)
+ return new EmptyConstantCast (c, type);
+
+ if (!TypeManager.IsValueType (type))
+ return new EmptyConstantCast (new NullLiteral (Location), type);
+ }
+ eclass = ExprClass.Variable;
+ return this;
}
- public Binary (Operator oper, Expression left, Expression right)
+ public override void Emit (EmitContext ec)
{
- this.oper = oper;
- this.left = left;
- this.right = right;
- this.loc = left.Location;
- }
+ LocalTemporary temp_storage = new LocalTemporary(type);
- public Operator Oper {
- get {
- return oper;
- }
+ temp_storage.AddressOf(ec, AddressOp.LoadStore);
+ ec.ig.Emit(OpCodes.Initobj, type);
+ temp_storage.Emit(ec);
}
- /// <summary>
- /// Returns a stringified representation of the Operator
- /// </summary>
- string OperName (Operator oper)
+ protected override void CloneTo (CloneContext clonectx, Expression t)
{
- string s;
- switch (oper){
- case Operator.Multiply:
- s = "*";
- break;
- case Operator.Division:
- s = "/";
- break;
- case Operator.Modulus:
- s = "%";
- break;
- case Operator.Addition:
- s = "+";
- break;
- case Operator.Subtraction:
- s = "-";
- break;
- case Operator.LeftShift:
- s = "<<";
- break;
- case Operator.RightShift:
- s = ">>";
- break;
- case Operator.LessThan:
- s = "<";
- break;
- case Operator.GreaterThan:
- s = ">";
- break;
- case Operator.LessThanOrEqual:
- s = "<=";
- break;
- case Operator.GreaterThanOrEqual:
- s = ">=";
- break;
- case Operator.Equality:
- s = "==";
- break;
- case Operator.Inequality:
- s = "!=";
- break;
- case Operator.BitwiseAnd:
- s = "&";
- break;
- case Operator.BitwiseOr:
- s = "|";
- break;
- case Operator.ExclusiveOr:
- s = "^";
- break;
- case Operator.LogicalOr:
- s = "||";
- break;
- case Operator.LogicalAnd:
- s = "&&";
- break;
- default:
- s = oper.ToString ();
- break;
+ DefaultValueExpression target = (DefaultValueExpression) t;
+
+ target.expr = expr.Clone (clonectx);
+ }
+ }
+
+ /// <summary>
+ /// Binary operators
+ /// </summary>
+ public class Binary : Expression {
+
+ protected class PredefinedOperator {
+ protected readonly Type left;
+ protected readonly Type right;
+ public readonly Operator OperatorsMask;
+ public Type ReturnType;
+
+ public PredefinedOperator (Type ltype, Type rtype, Operator op_mask)
+ : this (ltype, rtype, op_mask, ltype)
+ {
}
- if (is_compound)
- return s + "=";
+ public PredefinedOperator (Type type, Operator op_mask, Type return_type)
+ : this (type, type, op_mask, return_type)
+ {
+ }
- return s;
- }
+ public PredefinedOperator (Type type, Operator op_mask)
+ : this (type, type, op_mask, type)
+ {
+ }
- public override string ToString ()
- {
- return "operator " + OperName (oper) + "(" + left.ToString () + ", " +
- right.ToString () + ")";
+ public PredefinedOperator (Type ltype, Type rtype, Operator op_mask, Type return_type)
+ {
+ if ((op_mask & Operator.ValuesOnlyMask) != 0)
+ throw new InternalErrorException ("Only masked values can be used");
+
+ this.left = ltype;
+ this.right = rtype;
+ this.OperatorsMask = op_mask;
+ this.ReturnType = return_type;
+ }
+
+ public virtual Expression ConvertResult (EmitContext ec, Binary b)
+ {
+ b.type = ReturnType;
+
+ if (left != null)
+ b.left = Convert.ImplicitConversion (ec, b.left, left, b.left.Location);
+
+ if (right != null)
+ b.right = Convert.ImplicitConversion (ec, b.right, right, b.right.Location);
+
+ return b;
+ }
+
+ public bool IsPrimitiveApplicable (Type type)
+ {
+ //
+ // We are dealing with primitive types only
+ //
+ return left == type;
+ }
+
+ public virtual bool IsApplicable (EmitContext ec, Expression lexpr, Expression rexpr, bool lnull, bool rnull)
+ {
+ if (lnull)
+ return Convert.ImplicitConversionExists (ec, rexpr, right);
+ if (rnull)
+ return Convert.ImplicitConversionExists (ec, lexpr, left);
+
+ if (TypeManager.IsEqual (left, lexpr.Type) &&
+ TypeManager.IsEqual (right, rexpr.Type))
+ return true;
+
+ return Convert.ImplicitConversionExists (ec, lexpr, left) &&
+ Convert.ImplicitConversionExists (ec, rexpr, right);
+ }
+
+ public PredefinedOperator ResolveBetterOperator (EmitContext ec, Expression lexpr, Expression rexpr, PredefinedOperator best_operator)
+ {
+ int result = 0;
+ if (left != null && best_operator.left != null) {
+ result = MethodGroupExpr.BetterTypeConversion (ec, best_operator.left, left);
+ }
+
+ //
+ // When second arguments are same as the first one, the result is same
+ //
+ if (left != right || best_operator.left != best_operator.right) {
+ result |= MethodGroupExpr.BetterTypeConversion (ec, best_operator.right, right);
+ }
+
+ if (result == 0 || result > 2)
+ return null;
+
+ return result == 1 ? best_operator : this;
+ }
}
-
- Expression ForceConversion (EmitContext ec, Expression expr, Type target_type)
- {
- if (expr.Type == target_type)
- return expr;
- return Convert.ImplicitConversion (ec, expr, target_type, loc);
+ class PredefinedStringOperator : PredefinedOperator {
+ public PredefinedStringOperator (Type type, Operator op_mask)
+ : base (type, op_mask, type)
+ {
+ ReturnType = TypeManager.string_type;
+ }
+
+ public PredefinedStringOperator (Type ltype, Type rtype, Operator op_mask)
+ : base (ltype, rtype, op_mask)
+ {
+ ReturnType = TypeManager.string_type;
+ }
+
+ public override Expression ConvertResult (EmitContext ec, Binary b)
+ {
+ //
+ // Use original expression for nullable arguments
+ //
+ Nullable.Unwrap unwrap = b.left as Nullable.Unwrap;
+ if (unwrap != null)
+ b.left = unwrap.Original;
+
+ unwrap = b.right as Nullable.Unwrap;
+ if (unwrap != null)
+ b.right = unwrap.Original;
+
+ b.left = Convert.ImplicitConversion (ec, b.left, left, b.left.Location);
+ b.right = Convert.ImplicitConversion (ec, b.right, right, b.right.Location);
+
+ //
+ // Start a new concat expression using converted expression
+ //
+ return new StringConcat (ec, b.loc, b.left, b.right).Resolve (ec);
+ }
}
- void Error_OperatorAmbiguous (Location loc, Operator oper, Type l, Type r)
- {
- Report.Error (
- 34, loc, "Operator `" + OperName (oper)
- + "' is ambiguous on operands of type `"
- + TypeManager.CSharpName (l) + "' "
- + "and `" + TypeManager.CSharpName (r)
- + "'");
+ class PredefinedShiftOperator : PredefinedOperator {
+ public PredefinedShiftOperator (Type ltype, Operator op_mask) :
+ base (ltype, TypeManager.int32_type, op_mask)
+ {
+ }
+
+ public override Expression ConvertResult (EmitContext ec, Binary b)
+ {
+ b.left = Convert.ImplicitConversion (ec, b.left, left, b.left.Location);
+
+ Expression expr_tree_expr = EmptyCast.Create (b.right, TypeManager.int32_type);
+
+ int right_mask = left == TypeManager.int32_type || left == TypeManager.uint32_type ? 0x1f : 0x3f;
+
+ //
+ // b = b.left >> b.right & (0x1f|0x3f)
+ //
+ b.right = new Binary (Operator.BitwiseAnd,
+ b.right, new IntConstant (right_mask, b.right.Location)).Resolve (ec);
+
+ //
+ // Expression tree representation does not use & mask
+ //
+ b.right = ReducedExpression.Create (b.right, expr_tree_expr).Resolve (ec);
+ b.type = ReturnType;
+ return b;
+ }
}
- bool IsConvertible (EmitContext ec, Expression le, Expression re, Type t)
- {
- return Convert.ImplicitConversionExists (ec, le, t) && Convert.ImplicitConversionExists (ec, re, t);
+ class PredefinedPointerOperator : PredefinedOperator {
+ public PredefinedPointerOperator (Type ltype, Type rtype, Operator op_mask)
+ : base (ltype, rtype, op_mask)
+ {
+ }
+
+ public PredefinedPointerOperator (Type type, Operator op_mask, Type return_type)
+ : base (type, op_mask, return_type)
+ {
+ }
+
+ public override bool IsApplicable (EmitContext ec, Expression lexpr, Expression rexpr, bool lnull, bool rnull)
+ {
+ if (left == null) {
+ if (!lexpr.Type.IsPointer)
+ return false;
+ } else {
+ if (!Convert.ImplicitConversionExists (ec, lexpr, left))
+ return false;
+ }
+
+ if (right == null) {
+ if (!rexpr.Type.IsPointer)
+ return false;
+ } else {
+ if (!Convert.ImplicitConversionExists (ec, rexpr, right))
+ return false;
+ }
+
+ return true;
+ }
+
+ public override Expression ConvertResult (EmitContext ec, Binary b)
+ {
+ base.ConvertResult (ec, b);
+
+ Type r_type = ReturnType;
+ if (r_type == null) {
+ r_type = b.left.Type;
+ if (r_type == null)
+ r_type = b.right.Type;
+ }
+
+ return new PointerArithmetic (b.oper == Operator.Addition,
+ b.left, b.right, r_type, b.loc).Resolve (ec);
+ }
}
- bool VerifyApplicable_Predefined (EmitContext ec, Type t)
- {
- if (!IsConvertible (ec, left, right, t))
- return false;
- left = ForceConversion (ec, left, t);
- right = ForceConversion (ec, right, t);
- type = t;
- return true;
+ [Flags]
+ public enum Operator {
+ Multiply = 0 | ArithmeticMask,
+ Division = 1 | ArithmeticMask,
+ Modulus = 2 | ArithmeticMask,
+ Addition = 3 | ArithmeticMask | AdditionMask,
+ Subtraction = 4 | ArithmeticMask | SubtractionMask,
+
+ LeftShift = 5 | ShiftMask,
+ RightShift = 6 | ShiftMask,
+
+ LessThan = 7 | ComparisonMask | RelationalMask,
+ GreaterThan = 8 | ComparisonMask | RelationalMask,
+ LessThanOrEqual = 9 | ComparisonMask | RelationalMask,
+ GreaterThanOrEqual = 10 | ComparisonMask | RelationalMask,
+ Equality = 11 | ComparisonMask | EqualityMask,
+ Inequality = 12 | ComparisonMask | EqualityMask,
+
+ BitwiseAnd = 13 | BitwiseMask,
+ ExclusiveOr = 14 | BitwiseMask,
+ BitwiseOr = 15 | BitwiseMask,
+
+ LogicalAnd = 16 | LogicalMask,
+ LogicalOr = 17 | LogicalMask,
+
+ //
+ // Operator masks
+ //
+ ValuesOnlyMask = ArithmeticMask - 1,
+ ArithmeticMask = 1 << 5,
+ ShiftMask = 1 << 6,
+ ComparisonMask = 1 << 7,
+ EqualityMask = 1 << 8,
+ BitwiseMask = 1 << 9,
+ LogicalMask = 1 << 10,
+ AdditionMask = 1 << 11,
+ SubtractionMask = 1 << 12,
+ RelationalMask = 1 << 13
}
- bool IsApplicable_String (EmitContext ec, Expression le, Expression re, Operator oper)
- {
- bool l = Convert.ImplicitConversionExists (ec, le, TypeManager.string_type);
- bool r = Convert.ImplicitConversionExists (ec, re, TypeManager.string_type);
+ readonly Operator oper;
+ protected Expression left, right;
+ readonly bool is_compound;
- if (oper == Operator.Equality || oper == Operator.Inequality)
- return l && r;
- if (oper == Operator.Addition)
- return l || r;
- return false;
+ // This must be kept in sync with Operator!!!
+ public static readonly string [] oper_names;
+
+ static PredefinedOperator [] standard_operators;
+ static PredefinedOperator [] pointer_operators;
+
+ static Binary ()
+ {
+ oper_names = new string [18];
+
+ oper_names [(int) (Operator.Multiply & Operator.ValuesOnlyMask)] = "op_Multiply";
+ oper_names [(int) (Operator.Division & Operator.ValuesOnlyMask)] = "op_Division";
+ oper_names [(int) (Operator.Modulus & Operator.ValuesOnlyMask)] = "op_Modulus";
+ oper_names [(int) (Operator.Addition & Operator.ValuesOnlyMask)] = "op_Addition";
+ oper_names [(int) (Operator.Subtraction & Operator.ValuesOnlyMask)] = "op_Subtraction";
+ oper_names [(int) (Operator.LeftShift & Operator.ValuesOnlyMask)] = "op_LeftShift";
+ oper_names [(int) (Operator.RightShift & Operator.ValuesOnlyMask)] = "op_RightShift";
+ oper_names [(int) (Operator.LessThan & Operator.ValuesOnlyMask)] = "op_LessThan";
+ oper_names [(int) (Operator.GreaterThan & Operator.ValuesOnlyMask)] = "op_GreaterThan";
+ oper_names [(int) (Operator.LessThanOrEqual & Operator.ValuesOnlyMask)] = "op_LessThanOrEqual";
+ oper_names [(int) (Operator.GreaterThanOrEqual & Operator.ValuesOnlyMask)] = "op_GreaterThanOrEqual";
+ oper_names [(int) (Operator.Equality & Operator.ValuesOnlyMask)] = "op_Equality";
+ oper_names [(int) (Operator.Inequality & Operator.ValuesOnlyMask)] = "op_Inequality";
+ oper_names [(int) (Operator.BitwiseAnd & Operator.ValuesOnlyMask)] = "op_BitwiseAnd";
+ oper_names [(int) (Operator.BitwiseOr & Operator.ValuesOnlyMask)] = "op_BitwiseOr";
+ oper_names [(int) (Operator.ExclusiveOr & Operator.ValuesOnlyMask)] = "op_ExclusiveOr";
+ oper_names [(int) (Operator.LogicalOr & Operator.ValuesOnlyMask)] = "op_LogicalOr";
+ oper_names [(int) (Operator.LogicalAnd & Operator.ValuesOnlyMask)] = "op_LogicalAnd";
}
- bool OverloadResolve_PredefinedString (EmitContext ec, Operator oper)
+ public Binary (Operator oper, Expression left, Expression right, bool isCompound)
+ : this (oper, left, right)
{
- if (!IsApplicable_String (ec, left, right, oper))
- return false;
- Type t = TypeManager.string_type;
- if (Convert.ImplicitConversionExists (ec, left, t))
- left = ForceConversion (ec, left, t);
- if (Convert.ImplicitConversionExists (ec, right, t))
- right = ForceConversion (ec, right, t);
- type = t;
- return true;
+ this.is_compound = isCompound;
}
- bool OverloadResolve_PredefinedIntegral (EmitContext ec)
+ public Binary (Operator oper, Expression left, Expression right)
{
- return VerifyApplicable_Predefined (ec, TypeManager.int32_type) ||
- VerifyApplicable_Predefined (ec, TypeManager.uint32_type) ||
- VerifyApplicable_Predefined (ec, TypeManager.int64_type) ||
- VerifyApplicable_Predefined (ec, TypeManager.uint64_type) ||
- false;
+ this.oper = oper;
+ this.left = left;
+ this.right = right;
+ this.loc = left.Location;
}
- bool OverloadResolve_PredefinedFloating (EmitContext ec)
+ public Operator Oper {
+ get {
+ return oper;
+ }
+ }
+
+ /// <summary>
+ /// Returns a stringified representation of the Operator
+ /// </summary>
+ string OperName (Operator oper)
{
- return VerifyApplicable_Predefined (ec, TypeManager.float_type) ||
- VerifyApplicable_Predefined (ec, TypeManager.double_type) ||
- false;
+ string s;
+ switch (oper){
+ case Operator.Multiply:
+ s = "*";
+ break;
+ case Operator.Division:
+ s = "/";
+ break;
+ case Operator.Modulus:
+ s = "%";
+ break;
+ case Operator.Addition:
+ s = "+";
+ break;
+ case Operator.Subtraction:
+ s = "-";
+ break;
+ case Operator.LeftShift:
+ s = "<<";
+ break;
+ case Operator.RightShift:
+ s = ">>";
+ break;
+ case Operator.LessThan:
+ s = "<";
+ break;
+ case Operator.GreaterThan:
+ s = ">";
+ break;
+ case Operator.LessThanOrEqual:
+ s = "<=";
+ break;
+ case Operator.GreaterThanOrEqual:
+ s = ">=";
+ break;
+ case Operator.Equality:
+ s = "==";
+ break;
+ case Operator.Inequality:
+ s = "!=";
+ break;
+ case Operator.BitwiseAnd:
+ s = "&";
+ break;
+ case Operator.BitwiseOr:
+ s = "|";
+ break;
+ case Operator.ExclusiveOr:
+ s = "^";
+ break;
+ case Operator.LogicalOr:
+ s = "||";
+ break;
+ case Operator.LogicalAnd:
+ s = "&&";
+ break;
+ default:
+ s = oper.ToString ();
+ break;
+ }
+
+ if (is_compound)
+ return s + "=";
+
+ return s;
}
static public void Error_OperatorCannotBeApplied (Location loc, string name, Type l, Type r)
name, left, right);
}
- protected void Error_OperatorCannotBeApplied ()
+ protected void Error_OperatorCannotBeApplied (Expression left, Expression right)
{
- Error_OperatorCannotBeApplied (Location, OperName (oper), TypeManager.CSharpName (left.Type),
- TypeManager.CSharpName(right.Type));
- }
+ string l, r;
+ // TODO: This should be handled as Type of method group in CSharpName
+ if (left.eclass == ExprClass.MethodGroup)
+ l = left.ExprClassName;
+ else
+ l = TypeManager.CSharpName (left.Type);
- static bool is_unsigned (Type t)
- {
- if (t.IsPointer)
- return is_unsigned (t.GetElementType ());
-
- return (t == TypeManager.uint32_type || t == TypeManager.uint64_type ||
- t == TypeManager.short_type || t == TypeManager.byte_type);
- }
+ if (right.eclass == ExprClass.MethodGroup)
+ r = left.ExprClassName;
+ else
+ r = TypeManager.CSharpName (right.Type);
- Expression Make32or64 (EmitContext ec, Expression e)
- {
- Type t= e.Type;
-
- if (t == TypeManager.int32_type || t == TypeManager.uint32_type ||
- t == TypeManager.int64_type || t == TypeManager.uint64_type)
- return e;
- Expression ee = Convert.ImplicitConversion (ec, e, TypeManager.int32_type, loc);
- if (ee != null)
- return ee;
- ee = Convert.ImplicitConversion (ec, e, TypeManager.uint32_type, loc);
- if (ee != null)
- return ee;
- ee = Convert.ImplicitConversion (ec, e, TypeManager.int64_type, loc);
- if (ee != null)
- return ee;
- ee = Convert.ImplicitConversion (ec, e, TypeManager.uint64_type, loc);
- if (ee != null)
- return ee;
- return null;
- }
-
- Expression CheckShiftArguments (EmitContext ec)
- {
- Expression new_left = Make32or64 (ec, left);
- Expression new_right = ForceConversion (ec, right, TypeManager.int32_type);
- if (new_left == null || new_right == null) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
- type = new_left.Type;
- int shiftmask = (type == TypeManager.int32_type || type == TypeManager.uint32_type) ? 31 : 63;
- left = new_left;
- right = new Binary (Binary.Operator.BitwiseAnd, new_right, new IntConstant (shiftmask, loc)).DoResolve (ec);
- return this;
+ Error_OperatorCannotBeApplied (Location, OperName (oper), l, r);
}
- //
- // This is used to check if a test 'x == null' can be optimized to a reference equals,
- // i.e., not invoke op_Equality.
- //
- static bool EqualsNullIsReferenceEquals (Type t)
+ public static string GetOperatorMetadataName (Operator op)
{
- return t == TypeManager.object_type || t == TypeManager.string_type ||
- t == TypeManager.delegate_type || t.IsSubclassOf (TypeManager.delegate_type);
+ return oper_names [(int)(op & Operator.ValuesOnlyMask)];
}
- static void Warning_UnintendedReferenceComparison (Location loc, string side, Type type)
+ static bool IsUnsigned (Type t)
{
- Report.Warning ((side == "left" ? 252 : 253), 2, loc,
- "Possible unintended reference comparison; to get a value comparison, " +
- "cast the {0} hand side to type `{1}'.", side, TypeManager.CSharpName (type));
- }
+ while (t.IsPointer)
+ t = TypeManager.GetElementType (t);
- static void Warning_Constant_Result (Location loc, bool result, Type type)
- {
- Report.Warning (472, 2, loc, "The result of comparing `{0}' against null is always `{1}'. " +
- "This operation is undocumented and it is temporary supported for compatibility reasons only",
- TypeManager.CSharpName (type), result ? "true" : "false");
+ return (t == TypeManager.uint32_type || t == TypeManager.uint64_type ||
+ t == TypeManager.ushort_type || t == TypeManager.byte_type);
}
-
+
Expression ResolveOperator (EmitContext ec)
{
Type l = left.Type;
Type r = right.Type;
+ Expression expr;
+ bool primitives_only = false;
- if (oper == Operator.Equality || oper == Operator.Inequality){
- if (right.Type == TypeManager.null_type){
- if (TypeManager.IsGenericParameter (l)){
- if (l.BaseType == TypeManager.value_type) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
-
- left = new BoxedCast (left, TypeManager.object_type);
- Type = TypeManager.bool_type;
- return this;
- }
+ //
+ // Handles predefined primitive types
+ //
+ if (TypeManager.IsPrimitiveType (l) && TypeManager.IsPrimitiveType (r)) {
+ if ((oper & Operator.ShiftMask) == 0) {
+ if (l != TypeManager.bool_type && !DoBinaryOperatorPromotion (ec))
+ return null;
- //
- // CSC 2 has this behavior, it allows structs to be compared
- // with the null literal *outside* of a generics context and
- // inlines that as true or false.
- //
- // This is, in my opinion, completely wrong.
- //
- if (RootContext.Version != LanguageVersion.ISO_1 && l.IsValueType){
- Warning_Constant_Result (loc, oper == Operator.Inequality, l);
- return new BoolLiteral (oper == Operator.Inequality, loc);
- }
+ primitives_only = true;
}
+ } else {
+ // Pointers
+ if (l.IsPointer || r.IsPointer)
+ return ResolveOperatorPointer (ec, l, r);
- if (left is NullLiteral){
- if (TypeManager.IsGenericParameter (r)){
- if (r.BaseType == TypeManager.value_type) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
-
- right = new BoxedCast (right, TypeManager.object_type);
- Type = TypeManager.bool_type;
- return this;
- }
+ // Enums
+ bool lenum = TypeManager.IsEnumType (l);
+ bool renum = TypeManager.IsEnumType (r);
+ if (lenum || renum) {
+ expr = ResolveOperatorEnum (ec, lenum, renum, l, r);
- //
- // CSC 2 has this behavior, it allows structs to be compared
- // with the null literal *outside* of a generics context and
- // inlines that as true or false.
- //
- // This is, in my opinion, completely wrong.
- //
- if (RootContext.Version != LanguageVersion.ISO_1 && r.IsValueType){
- Warning_Constant_Result (loc, oper == Operator.Inequality, r);
- return new BoolLiteral (oper == Operator.Inequality, loc);
- }
+ // TODO: Can this be ambiguous
+ if (expr != null)
+ return expr;
}
- //
- // Optimize out call to op_Equality in a few cases.
- //
- if ((l == TypeManager.null_type && EqualsNullIsReferenceEquals (r)) ||
- (r == TypeManager.null_type && EqualsNullIsReferenceEquals (l))) {
- Type = TypeManager.bool_type;
- return this;
+ // Delegates
+ if (oper == Operator.Addition || oper == Operator.Subtraction) {
+ if (TypeManager.IsDelegateType (l))
+ return ResolveOperatorDelegateBinary (ec, l, r);
}
- // IntPtr equality
- if (l == TypeManager.intptr_type && r == TypeManager.intptr_type) {
- Type = TypeManager.bool_type;
- return this;
- }
+ // User operators
+ expr = ResolveUserOperator (ec, l, r);
+ if (expr != null)
+ return expr;
-#if GMCS_SOURCE
- //
- // Delegate equality
- //
- MethodGroupExpr mg = null;
- Type delegate_type = null;
- if (left.eclass == ExprClass.MethodGroup) {
- if (!TypeManager.IsDelegateType(r)) {
- Error_OperatorCannotBeApplied(Location, OperName(oper),
- left.ExprClassName, right.ExprClassName);
- return null;
- }
- mg = (MethodGroupExpr)left;
- delegate_type = r;
- } else if (right.eclass == ExprClass.MethodGroup) {
- if (!TypeManager.IsDelegateType(l)) {
- Error_OperatorCannotBeApplied(Location, OperName(oper),
- left.ExprClassName, right.ExprClassName);
- return null;
- }
- mg = (MethodGroupExpr)right;
- delegate_type = l;
+ // Predefined reference types equality
+ if ((oper & Operator.EqualityMask) != 0) {
+ expr = ResolveOperatorEqualityRerefence (ec, l, r);
+ if (expr != null)
+ return expr;
}
+ }
- if (mg != null) {
- Expression e = ImplicitDelegateCreation.Create (ec, mg, delegate_type, loc);
- if (e == null)
- return null;
+ if (standard_operators == null)
+ CreateStandardOperatorsTable ();
- // Find operator method
- string op = oper_names[(int)oper];
- MemberInfo[] mi = TypeManager.MemberLookup(ec.ContainerType, null,
- TypeManager.delegate_type, MemberTypes.Method, AllBindingFlags, op, null);
+ return ResolveOperatorPredefined (ec, standard_operators, primitives_only);
+ }
- ArrayList args = new ArrayList(2);
- args.Add(new Argument(e, Argument.AType.Expression));
- if (delegate_type == l)
- args.Insert(0, new Argument(left, Argument.AType.Expression));
- else
- args.Add(new Argument(right, Argument.AType.Expression));
+ Constant EnumLiftUp (Constant left, Constant right)
+ {
+ switch (oper) {
+ case Operator.BitwiseOr:
+ case Operator.BitwiseAnd:
+ case Operator.ExclusiveOr:
+ case Operator.Equality:
+ case Operator.Inequality:
+ case Operator.LessThan:
+ case Operator.LessThanOrEqual:
+ case Operator.GreaterThan:
+ case Operator.GreaterThanOrEqual:
+ if (left is EnumConstant)
+ return left;
+
+ if (left.IsZeroInteger)
+ return new EnumConstant (left, right.Type);
+
+ break;
+
+ case Operator.Addition:
+ case Operator.Subtraction:
+ return left;
+
+ case Operator.Multiply:
+ case Operator.Division:
+ case Operator.Modulus:
+ case Operator.LeftShift:
+ case Operator.RightShift:
+ if (right is EnumConstant || left is EnumConstant)
+ break;
+ return left;
+ }
+ Error_OperatorCannotBeApplied (this.left, this.right);
+ return null;
+ }
- return new BinaryMethod (TypeManager.bool_type, (MethodInfo)mi [0], args);
- }
-#endif
- if (l == TypeManager.anonymous_method_type || r == TypeManager.anonymous_method_type) {
- Error_OperatorCannotBeApplied(Location, OperName(oper),
- left.ExprClassName, right.ExprClassName);
- return null;
- }
+ //
+ // The `|' operator used on types which were extended is dangerous
+ //
+ void CheckBitwiseOrOnSignExtended ()
+ {
+ OpcodeCast lcast = left as OpcodeCast;
+ if (lcast != null) {
+ if (IsUnsigned (lcast.UnderlyingType))
+ lcast = null;
+ }
+
+ OpcodeCast rcast = right as OpcodeCast;
+ if (rcast != null) {
+ if (IsUnsigned (rcast.UnderlyingType))
+ rcast = null;
}
+ if (lcast == null && rcast == null)
+ return;
+
+ // FIXME: consider constants
+
+ Report.Warning (675, 3, loc,
+ "The operator `|' used on the sign-extended type `{0}'. Consider casting to a smaller unsigned type first",
+ TypeManager.CSharpName (lcast != null ? lcast.UnderlyingType : rcast.UnderlyingType));
+ }
+
+ static void CreatePointerOperatorsTable ()
+ {
+ ArrayList temp = new ArrayList ();
//
- // Do not perform operator overload resolution when both sides are
- // built-in types
+ // Pointer arithmetic:
//
- MethodGroupExpr left_operators = null, right_operators = null;
- if (!(TypeManager.IsPrimitiveType (l) && TypeManager.IsPrimitiveType (r))) {
- //
- // Step 1: Perform Operator Overload location
- //
- string op = oper_names [(int) oper];
-
- MethodGroupExpr union;
- left_operators = MemberLookup (ec.ContainerType, l, op, MemberTypes.Method, AllBindingFlags, loc) as MethodGroupExpr;
- if (r != l){
- right_operators = MemberLookup (
- ec.ContainerType, r, op, MemberTypes.Method, AllBindingFlags, loc) as MethodGroupExpr;
- union = MethodGroupExpr.MakeUnionSet (left_operators, right_operators, loc);
- } else
- union = left_operators;
+ // T* operator + (T* x, int y); T* operator - (T* x, int y);
+ // T* operator + (T* x, uint y); T* operator - (T* x, uint y);
+ // T* operator + (T* x, long y); T* operator - (T* x, long y);
+ // T* operator + (T* x, ulong y); T* operator - (T* x, ulong y);
+ //
+ temp.Add (new PredefinedPointerOperator (null, TypeManager.int32_type, Operator.AdditionMask | Operator.SubtractionMask));
+ temp.Add (new PredefinedPointerOperator (null, TypeManager.uint32_type, Operator.AdditionMask | Operator.SubtractionMask));
+ temp.Add (new PredefinedPointerOperator (null, TypeManager.int64_type, Operator.AdditionMask | Operator.SubtractionMask));
+ temp.Add (new PredefinedPointerOperator (null, TypeManager.uint64_type, Operator.AdditionMask | Operator.SubtractionMask));
+
+ //
+ // T* operator + (int y, T* x);
+ // T* operator + (uint y, T *x);
+ // T* operator + (long y, T *x);
+ // T* operator + (ulong y, T *x);
+ //
+ temp.Add (new PredefinedPointerOperator (TypeManager.int32_type, null, Operator.AdditionMask));
+ temp.Add (new PredefinedPointerOperator (TypeManager.uint32_type, null, Operator.AdditionMask));
+ temp.Add (new PredefinedPointerOperator (TypeManager.int64_type, null, Operator.AdditionMask));
+ temp.Add (new PredefinedPointerOperator (TypeManager.uint64_type, null, Operator.AdditionMask));
+
+ //
+ // long operator - (T* x, T *y)
+ //
+ temp.Add (new PredefinedPointerOperator (null, Operator.SubtractionMask, TypeManager.int64_type));
- if (union != null) {
- ArrayList args = new ArrayList (2);
- args.Add (new Argument (left, Argument.AType.Expression));
- args.Add (new Argument (right, Argument.AType.Expression));
+ pointer_operators = (PredefinedOperator []) temp.ToArray (typeof (PredefinedOperator));
+ }
+
+ static void CreateStandardOperatorsTable ()
+ {
+ ArrayList temp = new ArrayList ();
+ Type bool_type = TypeManager.bool_type;
- union = union.OverloadResolve (ec, args, true, Location.Null);
+ temp.Add (new PredefinedOperator (TypeManager.int32_type, Operator.ArithmeticMask | Operator.BitwiseMask));
+ temp.Add (new PredefinedOperator (TypeManager.uint32_type, Operator.ArithmeticMask | Operator.BitwiseMask));
+ temp.Add (new PredefinedOperator (TypeManager.int64_type, Operator.ArithmeticMask | Operator.BitwiseMask));
+ temp.Add (new PredefinedOperator (TypeManager.uint64_type, Operator.ArithmeticMask | Operator.BitwiseMask));
+ temp.Add (new PredefinedOperator (TypeManager.float_type, Operator.ArithmeticMask));
+ temp.Add (new PredefinedOperator (TypeManager.double_type, Operator.ArithmeticMask));
- if (union != null) {
- MethodInfo mi = (MethodInfo) union;
- return new BinaryMethod (mi.ReturnType, mi, args);
- }
+ temp.Add (new PredefinedOperator (TypeManager.int32_type, Operator.ComparisonMask, bool_type));
+ temp.Add (new PredefinedOperator (TypeManager.uint32_type, Operator.ComparisonMask, bool_type));
+ temp.Add (new PredefinedOperator (TypeManager.int64_type, Operator.ComparisonMask, bool_type));
+ temp.Add (new PredefinedOperator (TypeManager.uint64_type, Operator.ComparisonMask, bool_type));
+ temp.Add (new PredefinedOperator (TypeManager.float_type, Operator.ComparisonMask, bool_type));
+ temp.Add (new PredefinedOperator (TypeManager.double_type, Operator.ComparisonMask, bool_type));
+
+ temp.Add (new PredefinedOperator (TypeManager.string_type, Operator.EqualityMask, bool_type));
+
+ temp.Add (new PredefinedStringOperator (TypeManager.string_type, Operator.AdditionMask));
+ temp.Add (new PredefinedStringOperator (TypeManager.string_type, TypeManager.object_type, Operator.AdditionMask));
+ temp.Add (new PredefinedStringOperator (TypeManager.object_type, TypeManager.string_type, Operator.AdditionMask));
+
+ temp.Add (new PredefinedOperator (bool_type,
+ Operator.BitwiseMask | Operator.LogicalMask | Operator.EqualityMask, bool_type));
+
+ temp.Add (new PredefinedShiftOperator (TypeManager.int32_type, Operator.ShiftMask));
+ temp.Add (new PredefinedShiftOperator (TypeManager.uint32_type, Operator.ShiftMask));
+ temp.Add (new PredefinedShiftOperator (TypeManager.int64_type, Operator.ShiftMask));
+ temp.Add (new PredefinedShiftOperator (TypeManager.uint64_type, Operator.ShiftMask));
+
+ standard_operators = (PredefinedOperator []) temp.ToArray (typeof (PredefinedOperator));
+ }
+
+ //
+ // Rules used during binary numeric promotion
+ //
+ static bool DoNumericPromotion (ref Expression prim_expr, ref Expression second_expr, Type type)
+ {
+ Expression temp;
+ Type etype;
+
+ Constant c = prim_expr as Constant;
+ if (c != null) {
+ temp = c.ConvertImplicitly (type);
+ if (temp != null) {
+ prim_expr = temp;
+ return true;
}
}
- //
- // Step 0: String concatenation (because overloading will get this wrong)
- //
- if (oper == Operator.Addition){
+ if (type == TypeManager.uint32_type) {
+ etype = prim_expr.Type;
+ if (etype == TypeManager.int32_type || etype == TypeManager.short_type || etype == TypeManager.sbyte_type) {
+ type = TypeManager.int64_type;
+
+ if (type != second_expr.Type) {
+ c = second_expr as Constant;
+ if (c != null)
+ temp = c.ConvertImplicitly (type);
+ else
+ temp = Convert.ImplicitNumericConversion (second_expr, type);
+ if (temp == null)
+ return false;
+ second_expr = temp;
+ }
+ }
+ } else if (type == TypeManager.uint64_type) {
//
- // If any of the arguments is a string, cast to string
+ // A compile-time error occurs if the other operand is of type sbyte, short, int, or long
//
-
- // Simple constant folding
- if (left is StringConstant && right is StringConstant)
- return new StringConstant (((StringConstant) left).Value + ((StringConstant) right).Value, left.Location);
-
- if (l == TypeManager.string_type || r == TypeManager.string_type) {
+ if (type == TypeManager.int32_type || type == TypeManager.int64_type ||
+ type == TypeManager.sbyte_type || type == TypeManager.sbyte_type)
+ return false;
+ }
- if (r == TypeManager.void_type || l == TypeManager.void_type) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ temp = Convert.ImplicitNumericConversion (prim_expr, type);
+ if (temp == null)
+ return false;
- // try to fold it in on the left
- if (left is StringConcat) {
+ prim_expr = temp;
+ return true;
+ }
- //
- // We have to test here for not-null, since we can be doubly-resolved
- // take care of not appending twice
- //
- if (type == null){
- type = TypeManager.string_type;
- ((StringConcat) left).Append (ec, right);
- return left.Resolve (ec);
- } else {
- return left;
- }
- }
+ //
+ // 7.2.6.2 Binary numeric promotions
+ //
+ public bool DoBinaryOperatorPromotion (EmitContext ec)
+ {
+ Type ltype = left.Type;
+ Type rtype = right.Type;
+ Expression temp;
- // Otherwise, start a new concat expression
- return new StringConcat (ec, loc, left, right).Resolve (ec);
- }
+ foreach (Type t in ConstantFold.binary_promotions) {
+ if (t == ltype)
+ return t == rtype || DoNumericPromotion (ref right, ref left, t);
- //
- // Transform a + ( - b) into a - b
- //
- if (right is Unary){
- Unary right_unary = (Unary) right;
+ if (t == rtype)
+ return t == ltype || DoNumericPromotion (ref left, ref right, t);
+ }
- if (right_unary.Oper == Unary.Operator.UnaryNegation){
- return new Binary (Operator.Subtraction, left, right_unary.Expr).Resolve (ec);
- }
- }
+ Type int32 = TypeManager.int32_type;
+ if (ltype != int32) {
+ Constant c = left as Constant;
+ if (c != null)
+ temp = c.ImplicitConversionRequired (int32, loc);
+ else
+ temp = Convert.ImplicitNumericConversion (left, int32);
+
+ if (temp == null)
+ return false;
+ left = temp;
}
- if (oper == Operator.Equality || oper == Operator.Inequality){
- if (l == TypeManager.bool_type || r == TypeManager.bool_type){
- if (r != TypeManager.bool_type || l != TypeManager.bool_type){
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ if (rtype != int32) {
+ Constant c = right as Constant;
+ if (c != null)
+ temp = c.ImplicitConversionRequired (int32, loc);
+ else
+ temp = Convert.ImplicitNumericConversion (right, int32);
- type = TypeManager.bool_type;
- return this;
- }
+ if (temp == null)
+ return false;
+ right = temp;
+ }
- if (l.IsPointer || r.IsPointer) {
- if (l.IsPointer && r.IsPointer) {
- type = TypeManager.bool_type;
- return this;
- }
+ return true;
+ }
- if (l.IsPointer && r == TypeManager.null_type) {
- right = new EmptyConstantCast (NullPointer.Null, l);
- type = TypeManager.bool_type;
- return this;
- }
+ public override Expression DoResolve (EmitContext ec)
+ {
+ if (left == null)
+ return null;
- if (r.IsPointer && l == TypeManager.null_type) {
- left = new EmptyConstantCast (NullPointer.Null, r);
- type = TypeManager.bool_type;
- return this;
- }
+ if ((oper == Operator.Subtraction) && (left is ParenthesizedExpression)) {
+ left = ((ParenthesizedExpression) left).Expr;
+ left = left.Resolve (ec, ResolveFlags.VariableOrValue | ResolveFlags.Type);
+ if (left == null)
+ return null;
+
+ if (left.eclass == ExprClass.Type) {
+ Report.Error (75, loc, "To cast a negative value, you must enclose the value in parentheses");
+ return null;
}
+ } else
+ left = left.Resolve (ec);
-#if GMCS_SOURCE
- if (l.IsGenericParameter && r.IsGenericParameter) {
- GenericConstraints l_gc, r_gc;
+ if (left == null)
+ return null;
- l_gc = TypeManager.GetTypeParameterConstraints (l);
- r_gc = TypeManager.GetTypeParameterConstraints (r);
+ Constant lc = left as Constant;
- if ((l_gc == null) || (r_gc == null) ||
- !(l_gc.HasReferenceTypeConstraint || l_gc.HasClassConstraint) ||
- !(r_gc.HasReferenceTypeConstraint || r_gc.HasClassConstraint)) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ if (lc != null && lc.Type == TypeManager.bool_type &&
+ ((oper == Operator.LogicalAnd && lc.IsDefaultValue) ||
+ (oper == Operator.LogicalOr && !lc.IsDefaultValue))) {
- }
-#endif
+ // FIXME: resolve right expression as unreachable
+ // right.Resolve (ec);
- //
- // operator != (object a, object b)
- // operator == (object a, object b)
- //
- // For this to be used, both arguments have to be reference-types.
- // Read the rationale on the spec (14.9.6)
- //
- if (!(l.IsValueType || r.IsValueType)){
- type = TypeManager.bool_type;
+ Report.Warning (429, 4, loc, "Unreachable expression code detected");
+ return left;
+ }
- if (l == r)
- return this;
-
- //
- // Also, a standard conversion must exist from either one
- //
- // NOTE: An interface is converted to the object before the
- // standard conversion is applied. It's not clear from the
- // standard but it looks like it works like that.
- //
- if (l.IsInterface)
- l = TypeManager.object_type;
- if (r.IsInterface)
- r = TypeManager.object_type;
-
- bool left_to_right =
- Convert.ImplicitStandardConversionExists (left, r);
- bool right_to_left = !left_to_right &&
- Convert.ImplicitStandardConversionExists (right, l);
+ right = right.Resolve (ec);
+ if (right == null)
+ return null;
- if (!left_to_right && !right_to_left) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ eclass = ExprClass.Value;
+ Constant rc = right as Constant;
+
+ // The conversion rules are ignored in enum context but why
+ if (!ec.InEnumContext && lc != null && rc != null && (TypeManager.IsEnumType (left.Type) || TypeManager.IsEnumType (right.Type))) {
+ left = lc = EnumLiftUp (lc, rc);
+ if (lc == null)
+ return null;
+
+ right = rc = EnumLiftUp (rc, lc);
+ if (rc == null)
+ return null;
+ }
+
+ if (rc != null && lc != null) {
+ int prev_e = Report.Errors;
+ Expression e = ConstantFold.BinaryFold (
+ ec, oper, lc, rc, loc);
+ if (e != null || Report.Errors != prev_e)
+ return e;
+ } else {
+ if ((oper == Operator.BitwiseAnd || oper == Operator.LogicalAnd) &&
+ ((lc != null && lc.IsDefaultValue) || (rc != null && rc.IsDefaultValue))) {
- if (left_to_right && left_operators != null &&
- Report.WarningLevel >= 2) {
- ArrayList args = new ArrayList (2);
- args.Add (new Argument (left, Argument.AType.Expression));
- args.Add (new Argument (left, Argument.AType.Expression));
- if (left_operators.OverloadResolve (ec, args, true, Location.Null) != null)
- Warning_UnintendedReferenceComparison (loc, "right", l);
+ if ((ResolveOperator (ec)) == null) {
+ Error_OperatorCannotBeApplied (left, right);
+ return null;
}
- if (right_to_left && right_operators != null &&
- Report.WarningLevel >= 2) {
- ArrayList args = new ArrayList (2);
- args.Add (new Argument (right, Argument.AType.Expression));
- args.Add (new Argument (right, Argument.AType.Expression));
- if (right_operators.OverloadResolve (ec, args, true, Location.Null) != null)
- Warning_UnintendedReferenceComparison (loc, "left", r);
+ if (rc != null) {
+ right = left;
+ lc = rc;
}
+
+ // TODO: there must be better way how to check that the expression
+ // does not have any mutator
+ if (right is MemberExpr)
+ return lc;
- //
- // We are going to have to convert to an object to compare
- //
- if (l != TypeManager.object_type)
- left = EmptyCast.Create (left, TypeManager.object_type);
- if (r != TypeManager.object_type)
- right = EmptyCast.Create (right, TypeManager.object_type);
+ // The result is a constant with side-effect
+ return new SideEffectConstant (lc, right, loc);
+ }
+ }
- return this;
+ // Comparison warnings
+ if ((oper & Operator.ComparisonMask) != 0) {
+ if (left.Equals (right)) {
+ Report.Warning (1718, 3, loc, "A comparison made to same variable. Did you mean to compare something else?");
}
+ CheckUselessComparison (lc, right.Type);
+ CheckUselessComparison (rc, left.Type);
}
- // Only perform numeric promotions on:
- // +, -, *, /, %, &, |, ^, ==, !=, <, >, <=, >=
- //
- if (oper == Operator.Addition || oper == Operator.Subtraction) {
- if (TypeManager.IsDelegateType (l)){
- if (((right.eclass == ExprClass.MethodGroup) ||
- (r == TypeManager.anonymous_method_type))){
- if ((RootContext.Version != LanguageVersion.ISO_1)){
- Expression tmp = Convert.ImplicitConversionRequired (ec, right, l, loc);
- if (tmp == null)
- return null;
- right = tmp;
- r = right.Type;
- }
- }
+ if ((TypeManager.IsNullableType (left.Type) || TypeManager.IsNullableType (right.Type) ||
+ (left is NullLiteral && right.Type.IsValueType) || (right is NullLiteral && left.Type.IsValueType)) &&
+ !(this is Nullable.LiftedBinaryOperator))
+ return new Nullable.LiftedBinaryOperator (oper, left, right, loc).Resolve (ec);
- if (TypeManager.IsDelegateType (r) || right is NullLiteral){
- MethodInfo method;
- ArrayList args = new ArrayList (2);
-
- args = new ArrayList (2);
- args.Add (new Argument (left, Argument.AType.Expression));
- args.Add (new Argument (right, Argument.AType.Expression));
-
- if (oper == Operator.Addition)
- method = TypeManager.delegate_combine_delegate_delegate;
- else
- method = TypeManager.delegate_remove_delegate_delegate;
+ return DoResolveCore (ec, left, right);
+ }
+
+ protected Expression DoResolveCore (EmitContext ec, Expression left_orig, Expression right_orig)
+ {
+ Expression expr = ResolveOperator (ec);
+ if (expr == null)
+ Error_OperatorCannotBeApplied (left_orig, right_orig);
+
+ if (left == null || right == null)
+ throw new InternalErrorException ("Invalid conversion");
+
+ if (oper == Operator.BitwiseOr)
+ CheckBitwiseOrOnSignExtended ();
+
+ return expr;
+ }
+
+ //
+ // D operator + (D x, D y)
+ // D operator - (D x, D y)
+ //
+ Expression ResolveOperatorDelegateBinary (EmitContext ec, Type l, Type r)
+ {
+ if (((right.eclass == ExprClass.MethodGroup) || (r == TypeManager.anonymous_method_type))) {
+ if ((RootContext.Version != LanguageVersion.ISO_1)) {
+ Expression tmp = Convert.ImplicitConversionRequired (ec, right, l, loc);
+ if (tmp == null)
+ return null;
+ right = tmp;
+ r = right.Type;
+ }
+ } else {
+ if (!TypeManager.IsEqual (l, r) && !(right is NullLiteral))
+ return null;
+ }
+
+ MethodInfo method;
+ ArrayList args = new ArrayList (2);
- if (!TypeManager.IsEqual (l, r) && !(right is NullLiteral)) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ args = new ArrayList (2);
+ args.Add (new Argument (left, Argument.AType.Expression));
+ args.Add (new Argument (right, Argument.AType.Expression));
- return new BinaryDelegate (l, method, args);
- }
+ if (oper == Operator.Addition) {
+ if (TypeManager.delegate_combine_delegate_delegate == null) {
+ TypeManager.delegate_combine_delegate_delegate = TypeManager.GetPredefinedMethod (
+ TypeManager.delegate_type, "Combine", loc, TypeManager.delegate_type, TypeManager.delegate_type);
}
- //
- // Pointer arithmetic:
- //
- // T* operator + (T* x, int y);
- // T* operator + (T* x, uint y);
- // T* operator + (T* x, long y);
- // T* operator + (T* x, ulong y);
- //
- // T* operator + (int y, T* x);
- // T* operator + (uint y, T *x);
- // T* operator + (long y, T *x);
- // T* operator + (ulong y, T *x);
- //
- // T* operator - (T* x, int y);
- // T* operator - (T* x, uint y);
- // T* operator - (T* x, long y);
- // T* operator - (T* x, ulong y);
- //
- // long operator - (T* x, T *y)
- //
- if (l.IsPointer){
- if (r.IsPointer && oper == Operator.Subtraction){
- if (r == l)
- return new PointerArithmetic (
- false, left, right, TypeManager.int64_type,
- loc).Resolve (ec);
- } else {
- Expression t = Make32or64 (ec, right);
- if (t != null)
- return new PointerArithmetic (oper == Operator.Addition, left, t, l, loc).Resolve (ec);
- }
- } else if (r.IsPointer && oper == Operator.Addition){
- Expression t = Make32or64 (ec, left);
- if (t != null)
- return new PointerArithmetic (true, right, t, r, loc).Resolve (ec);
+ method = TypeManager.delegate_combine_delegate_delegate;
+ } else {
+ if (TypeManager.delegate_remove_delegate_delegate == null) {
+ TypeManager.delegate_remove_delegate_delegate = TypeManager.GetPredefinedMethod (
+ TypeManager.delegate_type, "Remove", loc, TypeManager.delegate_type, TypeManager.delegate_type);
}
+
+ method = TypeManager.delegate_remove_delegate_delegate;
}
-
- //
- // Enumeration operators
- //
- bool lie = TypeManager.IsEnumType (l);
- bool rie = TypeManager.IsEnumType (r);
- if (lie || rie){
- Expression temp;
- // U operator - (E e, E f)
- if (lie && rie){
- if (oper == Operator.Subtraction){
- if (l == r){
- type = TypeManager.EnumToUnderlying (l);
- return this;
- }
- Error_OperatorCannotBeApplied ();
- return null;
- }
- }
-
+ return new BinaryDelegate (l, method, args);
+ }
+
+ //
+ // Enumeration operators
+ //
+ Binary ResolveOperatorEnum (EmitContext ec, bool lenum, bool renum, Type ltype, Type rtype)
+ {
+ Expression temp;
+
+ if (lenum || renum) {
//
- // operator + (E e, U x)
- // operator - (E e, U x)
+ // bool operator == (E x, E y);
+ // bool operator != (E x, E y);
+ // bool operator < (E x, E y);
+ // bool operator > (E x, E y);
+ // bool operator <= (E x, E y);
+ // bool operator >= (E x, E y);
//
- if (oper == Operator.Addition || oper == Operator.Subtraction){
- Type enum_type = lie ? l : r;
- Type other_type = lie ? r : l;
- Type underlying_type = TypeManager.EnumToUnderlying (enum_type);
-
- if (underlying_type != other_type){
- temp = Convert.ImplicitConversion (ec, lie ? right : left, underlying_type, loc);
- if (temp != null){
- if (lie)
- right = temp;
- else
- left = temp;
- type = enum_type;
- return this;
+ if ((oper & Operator.ComparisonMask) != 0) {
+ type = TypeManager.bool_type;
+ } else if ((oper & Operator.BitwiseMask) != 0) {
+ type = ltype;
+ }
+
+ if (type != null) {
+ if (!TypeManager.IsEqual (ltype, rtype)) {
+ if (!lenum) {
+ temp = Convert.ImplicitConversion (ec, left, rtype, loc);
+ if (temp == null)
+ return null;
+ left = temp;
+ } else {
+ temp = Convert.ImplicitConversion (ec, right, ltype, loc);
+ if (temp == null)
+ return null;
+ right = temp;
}
-
- Error_OperatorCannotBeApplied ();
- return null;
}
- type = enum_type;
return this;
}
-
- if (!rie){
- temp = Convert.ImplicitConversion (ec, right, l, loc);
- if (temp != null)
- right = temp;
- else {
- Error_OperatorCannotBeApplied ();
- return null;
- }
- } if (!lie){
- temp = Convert.ImplicitConversion (ec, left, r, loc);
- if (temp != null){
- left = temp;
- l = r;
- } else {
- Error_OperatorCannotBeApplied ();
- return null;
- }
- }
+ }
- if (oper == Operator.Equality || oper == Operator.Inequality ||
- oper == Operator.LessThanOrEqual || oper == Operator.LessThan ||
- oper == Operator.GreaterThanOrEqual || oper == Operator.GreaterThan){
- if (left.Type != right.Type){
- Error_OperatorCannotBeApplied ();
+ Type underlying_type;
+ if (lenum && !renum) {
+ //
+ // E operator + (E e, U x)
+ // E operator - (E e, U x)
+ //
+ if (oper == Operator.Addition || oper == Operator.Subtraction) {
+ underlying_type = TypeManager.GetEnumUnderlyingType (ltype);
+ temp = Convert.ImplicitConversion (ec, right, underlying_type, loc);
+ if (temp == null)
return null;
- }
- type = TypeManager.bool_type;
- return this;
- }
- if (oper == Operator.BitwiseAnd ||
- oper == Operator.BitwiseOr ||
- oper == Operator.ExclusiveOr){
- if (left.Type != right.Type){
- Error_OperatorCannotBeApplied ();
- return null;
- }
- type = l;
+ right = temp;
+ type = ltype;
return this;
}
- Error_OperatorCannotBeApplied ();
+
return null;
}
-
- if (oper == Operator.LeftShift || oper == Operator.RightShift)
- return CheckShiftArguments (ec);
-
- if (oper == Operator.LogicalOr || oper == Operator.LogicalAnd){
- if (l == TypeManager.bool_type && r == TypeManager.bool_type) {
- type = TypeManager.bool_type;
- return this;
- }
- Expression left_operators_e = l == TypeManager.bool_type ?
- left : Convert.ImplicitUserConversion (ec, left, TypeManager.bool_type, loc);
- Expression right_operators_e = r == TypeManager.bool_type ?
- right : Convert.ImplicitUserConversion (ec, right, TypeManager.bool_type, loc);
+ if (renum) {
+ //
+ // E operator + (U x, E e)
+ //
+ if (oper == Operator.Addition) {
+ underlying_type = TypeManager.GetEnumUnderlyingType (rtype);
+ temp = Convert.ImplicitConversion (ec, left, underlying_type, loc);
+ if (temp == null)
+ return null;
- if (left_operators_e != null && right_operators_e != null) {
- left = left_operators_e;
- right = right_operators_e;
- type = TypeManager.bool_type;
+ left = temp;
+ type = rtype;
return this;
}
+ }
- Expression e = new ConditionalLogicalOperator (
- oper == Operator.LogicalAnd, left, right, l, loc);
- return e.Resolve (ec);
- }
+ //
+ // U operator - (E e, E f)
+ //
+ if (oper == Operator.Subtraction) {
+ if (!TypeManager.IsEqual (ltype, rtype))
+ return null;
- Expression orig_left = left;
- Expression orig_right = right;
+ type = TypeManager.GetEnumUnderlyingType (ltype);
+ return this;
+ }
+
+ return null;
+ }
+ //
+ // 7.9.6 Reference type equality operators
+ //
+ Binary ResolveOperatorEqualityRerefence (EmitContext ec, Type l, Type r)
+ {
//
- // operator & (bool x, bool y)
- // operator | (bool x, bool y)
- // operator ^ (bool x, bool y)
+ // operator != (object a, object b)
+ // operator == (object a, object b)
//
- if (oper == Operator.BitwiseAnd ||
- oper == Operator.BitwiseOr ||
- oper == Operator.ExclusiveOr) {
- if (OverloadResolve_PredefinedIntegral (ec)) {
- if (IsConvertible (ec, orig_left, orig_right, TypeManager.bool_type)) {
- Error_OperatorAmbiguous (loc, oper, l, r);
- return null;
- }
- if (oper == Operator.BitwiseOr && l != r && !(orig_right is Constant) && right is OpcodeCast &&
- (r == TypeManager.sbyte_type || r == TypeManager.short_type ||
- r == TypeManager.int32_type || r == TypeManager.int64_type)) {
- Report.Warning (675, 3, loc, "The operator `|' used on the sign-extended type `{0}'. Consider casting to a smaller unsigned type first",
- TypeManager.CSharpName (r));
- }
-
- } else if (!VerifyApplicable_Predefined (ec, TypeManager.bool_type)) {
- Error_OperatorCannotBeApplied ();
+ // TODO: this method is almost equivalent to Convert.ImplicitReferenceConversion
+
+ if (left.eclass == ExprClass.MethodGroup || right.eclass == ExprClass.MethodGroup)
+ return null;
+
+ type = TypeManager.bool_type;
+ GenericConstraints constraints;
+
+ bool lgen = TypeManager.IsGenericParameter (l);
+
+ if (TypeManager.IsEqual (l, r)) {
+ if (lgen) {
+ //
+ // Only allow to compare same reference type parameter
+ //
+ constraints = TypeManager.GetTypeParameterConstraints (l);
+ if (constraints != null && constraints.IsReferenceType)
+ return this;
+
return null;
}
+
+ if (l == TypeManager.anonymous_method_type)
+ return null;
+
+ if (TypeManager.IsValueType (l))
+ return null;
+
return this;
}
-
+
+ bool rgen = TypeManager.IsGenericParameter (r);
+
//
- // Pointer comparison
+ // a, Both operands are reference-type values or the value null
+ // b, One operand is a value of type T where T is a type-parameter and
+ // the other operand is the value null. Furthermore T does not have the
+ // value type constrain
//
- if (l.IsPointer && r.IsPointer){
- if (oper == Operator.LessThan || oper == Operator.LessThanOrEqual ||
- oper == Operator.GreaterThan || oper == Operator.GreaterThanOrEqual){
- type = TypeManager.bool_type;
+ if (left is NullLiteral || right is NullLiteral) {
+ if (lgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (l);
+ if (constraints != null && constraints.HasValueTypeConstraint)
+ return null;
+
+ left = new BoxedCast (left, TypeManager.object_type);
return this;
}
- }
- if (OverloadResolve_PredefinedIntegral (ec)) {
- if (IsApplicable_String (ec, orig_left, orig_right, oper)) {
- Error_OperatorAmbiguous (loc, oper, l, r);
- return null;
+ if (rgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (r);
+ if (constraints != null && constraints.HasValueTypeConstraint)
+ return null;
+
+ right = new BoxedCast (right, TypeManager.object_type);
+ return this;
}
- } else if (OverloadResolve_PredefinedFloating (ec)) {
- if (IsConvertible (ec, orig_left, orig_right, TypeManager.decimal_type) ||
- IsApplicable_String (ec, orig_left, orig_right, oper)) {
- Error_OperatorAmbiguous (loc, oper, l, r);
+ }
+
+ //
+ // An interface is converted to the object before the
+ // standard conversion is applied. It's not clear from the
+ // standard but it looks like it works like that.
+ //
+ if (lgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (l);
+ if (constraints == null || constraints.IsReferenceType)
return null;
- }
- } else if (VerifyApplicable_Predefined (ec, TypeManager.decimal_type)) {
- if (IsApplicable_String (ec, orig_left, orig_right, oper)) {
- Error_OperatorAmbiguous (loc, oper, l, r);
+ } else if (l.IsInterface) {
+ l = TypeManager.object_type;
+ }
+
+ if (rgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (r);
+ if (constraints == null || constraints.IsReferenceType)
return null;
- }
- } else if (!OverloadResolve_PredefinedString (ec, oper)) {
- Error_OperatorCannotBeApplied ();
- return null;
+ } else if (r.IsInterface) {
+ r = TypeManager.object_type;
}
- if (oper == Operator.Equality ||
- oper == Operator.Inequality ||
- oper == Operator.LessThanOrEqual ||
- oper == Operator.LessThan ||
- oper == Operator.GreaterThanOrEqual ||
- oper == Operator.GreaterThan)
- type = TypeManager.bool_type;
+ const string ref_comparison = "Possible unintended reference comparison. " +
+ "Consider casting the {0} side of the expression to `string' to compare the values";
- l = left.Type;
- r = right.Type;
+ //
+ // A standard implicit conversion exists from the type of either
+ // operand to the type of the other operand
+ //
+ if (Convert.ImplicitReferenceConversionExists (left, r)) {
+ if (l == TypeManager.string_type)
+ Report.Warning (253, 2, loc, ref_comparison, "right");
+
+ return this;
+ }
- if (l == TypeManager.decimal_type || l == TypeManager.string_type || r == TypeManager.string_type) {
- Type lookup = l;
+ if (Convert.ImplicitReferenceConversionExists (right, l)) {
if (r == TypeManager.string_type)
- lookup = r;
- MethodGroupExpr ops = (MethodGroupExpr) MemberLookup (
- ec.ContainerType, lookup, oper_names [(int) oper],
- MemberTypes.Method, AllBindingFlags, loc);
- ArrayList args = new ArrayList (2);
- args.Add (new Argument (left, Argument.AType.Expression));
- args.Add (new Argument (right, Argument.AType.Expression));
- ops = ops.OverloadResolve (ec, args, true, Location.Null);
- return new BinaryMethod (type, (MethodInfo)ops, args);
+ Report.Warning (252, 2, loc, ref_comparison, "left");
+
+ return this;
}
- return this;
+ return null;
}
- Constant EnumLiftUp (Constant left, Constant right)
- {
- switch (oper) {
- case Operator.BitwiseOr:
- case Operator.BitwiseAnd:
- case Operator.ExclusiveOr:
- case Operator.Equality:
- case Operator.Inequality:
- case Operator.LessThan:
- case Operator.LessThanOrEqual:
- case Operator.GreaterThan:
- case Operator.GreaterThanOrEqual:
- if (left is EnumConstant)
- return left;
-
- if (left.IsZeroInteger)
- return new EnumConstant (left, right.Type);
- break;
+ Expression ResolveOperatorPointer (EmitContext ec, Type l, Type r)
+ {
+ //
+ // bool operator == (void* x, void* y);
+ // bool operator != (void* x, void* y);
+ // bool operator < (void* x, void* y);
+ // bool operator > (void* x, void* y);
+ // bool operator <= (void* x, void* y);
+ // bool operator >= (void* x, void* y);
+ //
+ if ((oper & Operator.ComparisonMask) != 0) {
+ Expression temp;
+ if (!l.IsPointer) {
+ temp = Convert.ImplicitConversion (ec, left, r, left.Location);
+ if (temp == null)
+ return null;
+ left = temp;
+ }
- case Operator.Addition:
- case Operator.Subtraction:
- return left;
+ if (!r.IsPointer) {
+ temp = Convert.ImplicitConversion (ec, right, l, right.Location);
+ if (temp == null)
+ return null;
+ right = temp;
+ }
- case Operator.Multiply:
- case Operator.Division:
- case Operator.Modulus:
- case Operator.LeftShift:
- case Operator.RightShift:
- if (right is EnumConstant || left is EnumConstant)
- break;
- return left;
+ type = TypeManager.bool_type;
+ return this;
}
- Error_OperatorCannotBeApplied ();
- return null;
+
+ if (pointer_operators == null)
+ CreatePointerOperatorsTable ();
+
+ return ResolveOperatorPredefined (ec, pointer_operators, false);
}
- public override Expression DoResolve (EmitContext ec)
+ //
+ // Build-in operators method overloading
+ //
+ protected virtual Expression ResolveOperatorPredefined (EmitContext ec, PredefinedOperator [] operators, bool primitives_only)
{
- if (left == null)
- return null;
+ PredefinedOperator best_operator = null;
+ Type l = left.Type;
+ Operator oper_mask = oper & ~Operator.ValuesOnlyMask;
- if ((oper == Operator.Subtraction) && (left is ParenthesizedExpression)) {
- left = ((ParenthesizedExpression) left).Expr;
- left = left.Resolve (ec, ResolveFlags.VariableOrValue | ResolveFlags.Type);
- if (left == null)
- return null;
+ bool left_is_null = left is NullLiteral && RootContext.Version >= LanguageVersion.ISO_2;
+ bool right_is_null = right is NullLiteral && RootContext.Version >= LanguageVersion.ISO_2;
+
+ foreach (PredefinedOperator po in operators) {
+ if ((po.OperatorsMask & oper_mask) == 0)
+ continue;
- if (left.eclass == ExprClass.Type) {
- Report.Error (75, loc, "To cast a negative value, you must enclose the value in parentheses");
- return null;
+ if (primitives_only) {
+ if (!po.IsPrimitiveApplicable (l))
+ continue;
+ } else {
+ if (!po.IsApplicable (ec, left, right, left_is_null, right_is_null))
+ continue;
}
- } else
- left = left.Resolve (ec);
- if (left == null)
- return null;
+ if (best_operator == null) {
+ best_operator = po;
+ if (primitives_only)
+ break;
- Constant lc = left as Constant;
- if (lc != null && lc.Type == TypeManager.bool_type &&
- ((oper == Operator.LogicalAnd && (bool)lc.GetValue () == false) ||
- (oper == Operator.LogicalOr && (bool)lc.GetValue () == true))) {
+ continue;
+ }
- // TODO: make a sense to resolve unreachable expression as we do for statement
- Report.Warning (429, 4, loc, "Unreachable expression code detected");
- return left;
+ best_operator = po.ResolveBetterOperator (ec, left, right, best_operator);
+
+ if (best_operator == null) {
+ Report.Error (34, loc, "Operator `{0}' is ambiguous on operands of type `{1}' and `{2}'",
+ OperName (oper), left.GetSignatureForError (), right.GetSignatureForError ());
+
+ best_operator = po;
+ break;
+ }
}
- right = right.Resolve (ec);
- if (right == null)
+ if (best_operator == null)
return null;
- eclass = ExprClass.Value;
- Constant rc = right as Constant;
+ return best_operator.ConvertResult (ec, this);
+ }
- // The conversion rules are ignored in enum context but why
- if (!ec.InEnumContext && lc != null && rc != null && (TypeManager.IsEnumType (left.Type) || TypeManager.IsEnumType (right.Type))) {
- left = lc = EnumLiftUp (lc, rc);
- if (lc == null)
- return null;
+ //
+ // Performs user-operator overloading
+ //
+ protected virtual Expression ResolveUserOperator (EmitContext ec, Type l, Type r)
+ {
+ Operator user_oper;
+ if (oper == Operator.LogicalAnd)
+ user_oper = Operator.BitwiseAnd;
+ else if (oper == Operator.LogicalOr)
+ user_oper = Operator.BitwiseOr;
+ else
+ user_oper = oper;
- right = rc = EnumLiftUp (rc, lc);
- if (rc == null)
- return null;
- }
+ string op = GetOperatorMetadataName (user_oper);
- if (oper == Operator.BitwiseAnd) {
- if (rc != null && rc.IsZeroInteger) {
- return lc is EnumConstant ?
- new EnumConstant (rc, lc.Type):
- rc;
- }
+ MethodGroupExpr union;
+ MethodGroupExpr left_operators = MemberLookup (ec.ContainerType, l, op, MemberTypes.Method, AllBindingFlags, loc) as MethodGroupExpr;
+ if (!TypeManager.IsEqual (r, l)) {
+ MethodGroupExpr right_operators = MemberLookup (
+ ec.ContainerType, r, op, MemberTypes.Method, AllBindingFlags, loc) as MethodGroupExpr;
+ union = MethodGroupExpr.MakeUnionSet (left_operators, right_operators, loc);
+ } else
+ union = left_operators;
- if (lc != null && lc.IsZeroInteger) {
- return rc is EnumConstant ?
- new EnumConstant (lc, rc.Type):
- lc;
- }
- }
- else if (oper == Operator.BitwiseOr) {
- if (lc is EnumConstant &&
- rc != null && rc.IsZeroInteger)
- return lc;
- if (rc is EnumConstant &&
- lc != null && lc.IsZeroInteger)
- return rc;
- } else if (oper == Operator.LogicalAnd) {
- if (rc != null && rc.IsDefaultValue && rc.Type == TypeManager.bool_type)
- return rc;
- if (lc != null && lc.IsDefaultValue && lc.Type == TypeManager.bool_type)
- return lc;
- }
+ if (union == null)
+ return null;
- if (rc != null && lc != null){
- int prev_e = Report.Errors;
- Expression e = ConstantFold.BinaryFold (
- ec, oper, lc, rc, loc);
- if (e != null || Report.Errors != prev_e)
- return e;
- }
+ ArrayList args = new ArrayList (2);
+ Argument larg = new Argument (left);
+ args.Add (larg);
+ Argument rarg = new Argument (right);
+ args.Add (rarg);
-#if GMCS_SOURCE
- if ((left is NullLiteral || left.Type.IsValueType) &&
- (right is NullLiteral || right.Type.IsValueType) &&
- !(left is NullLiteral && right is NullLiteral) &&
- (TypeManager.IsNullableType (left.Type) || TypeManager.IsNullableType (right.Type)))
- return new Nullable.LiftedBinaryOperator (oper, left, right, loc).Resolve (ec);
-#endif
+ //
+ // TODO: Rewrite !
+ // Aparrently user-operators use different overloading rules especially for lifted arguments.
+ // Some details are in 6.4.2, 7.2.7
+ // Case 1: Arguments can be lifted for equal operators when the return type is bool and both
+ // arguments are of same type and they are convertible.
+ //
+ union = union.OverloadResolve (ec, ref args, true, loc);
+ if (union == null)
+ return null;
- // Comparison warnings
- if (oper == Operator.Equality || oper == Operator.Inequality ||
- oper == Operator.LessThanOrEqual || oper == Operator.LessThan ||
- oper == Operator.GreaterThanOrEqual || oper == Operator.GreaterThan){
- if (left.Equals (right)) {
- Report.Warning (1718, 3, loc, "A comparison made to same variable. Did you mean to compare something else?");
+ if (user_oper != oper) {
+ // FIXME: This has to derive from UserOperatorCall to handle expression tree
+ return new ConditionalLogicalOperator (oper == Operator.LogicalAnd,
+ left, right, left.Type, loc).Resolve (ec);
+ }
+
+ //
+ // This is used to check if a test 'x == null' can be optimized to a reference equals,
+ // and not invoke user operator
+ //
+ if ((oper & Operator.EqualityMask) != 0) {
+ if ((left is NullLiteral && IsBuildInEqualityOperator (r)) ||
+ (right is NullLiteral && IsBuildInEqualityOperator (l))) {
+ type = TypeManager.bool_type;
+ // FIXME: this breaks expression tree
+ if (left is NullLiteral || right is NullLiteral)
+ return this;
+ } else if (union.DeclaringType == TypeManager.delegate_type && l != r) {
+ //
+ // Two System.Delegate(s) are never equal
+ //
+ return null;
}
- CheckUselessComparison (lc, right.Type);
- CheckUselessComparison (rc, left.Type);
}
- return ResolveOperator (ec);
+ left = larg.Expr;
+ right = rarg.Expr;
+ // TODO: CreateExpressionTree is allocated every time
+ return new UserOperatorCall (union, args, CreateExpressionTree, loc);
}
public override TypeExpr ResolveAsTypeTerminal (IResolveContext ec, bool silent)
type == TypeManager.uint32_type && value >= 0x100000000;
}
+ static bool IsBuildInEqualityOperator (Type t)
+ {
+ return t == TypeManager.object_type || t == TypeManager.string_type ||
+ t == TypeManager.delegate_type || TypeManager.IsDelegateType (t);
+ }
+
private static bool IsTypeIntegral (Type type)
{
return type == TypeManager.uint64_type ||
/// The expression's code is generated, and we will generate a branch to `target'
/// if the resulting expression value is equal to isTrue
/// </remarks>
- public override void EmitBranchable (EmitContext ec, Label target, bool onTrue)
+ public override void EmitBranchable (EmitContext ec, Label target, bool on_true)
{
ILGenerator ig = ec.ig;
// if we are comparing against null
//
if ((oper == Operator.Equality || oper == Operator.Inequality) && (left is Constant || right is Constant)) {
- bool my_on_true = oper == Operator.Inequality ? onTrue : !onTrue;
+ bool my_on_true = oper == Operator.Inequality ? on_true : !on_true;
//
// put the constant on the rhs, for simplicity
} else if (oper == Operator.LogicalAnd) {
- if (onTrue) {
+ if (on_true) {
Label tests_end = ig.DefineLabel ();
left.EmitBranchable (ec, tests_end, false);
return;
} else if (oper == Operator.LogicalOr){
- if (onTrue) {
+ if (on_true) {
left.EmitBranchable (ec, target, true);
right.EmitBranchable (ec, target, true);
} else if (!(oper == Operator.LessThan || oper == Operator.GreaterThan ||
oper == Operator.LessThanOrEqual || oper == Operator.GreaterThanOrEqual ||
oper == Operator.Equality || oper == Operator.Inequality)) {
- base.EmitBranchable (ec, target, onTrue);
+ base.EmitBranchable (ec, target, on_true);
return;
}
right.Emit (ec);
Type t = left.Type;
- bool isUnsigned = is_unsigned (t) || t == TypeManager.double_type || t == TypeManager.float_type;
+ bool is_unsigned = IsUnsigned (t) || t == TypeManager.double_type || t == TypeManager.float_type;
switch (oper){
case Operator.Equality:
- if (onTrue)
+ if (on_true)
ig.Emit (OpCodes.Beq, target);
else
ig.Emit (OpCodes.Bne_Un, target);
break;
case Operator.Inequality:
- if (onTrue)
+ if (on_true)
ig.Emit (OpCodes.Bne_Un, target);
else
ig.Emit (OpCodes.Beq, target);
break;
case Operator.LessThan:
- if (onTrue)
- if (isUnsigned)
+ if (on_true)
+ if (is_unsigned)
ig.Emit (OpCodes.Blt_Un, target);
else
ig.Emit (OpCodes.Blt, target);
else
- if (isUnsigned)
+ if (is_unsigned)
ig.Emit (OpCodes.Bge_Un, target);
else
ig.Emit (OpCodes.Bge, target);
break;
case Operator.GreaterThan:
- if (onTrue)
- if (isUnsigned)
+ if (on_true)
+ if (is_unsigned)
ig.Emit (OpCodes.Bgt_Un, target);
else
ig.Emit (OpCodes.Bgt, target);
else
- if (isUnsigned)
+ if (is_unsigned)
ig.Emit (OpCodes.Ble_Un, target);
else
ig.Emit (OpCodes.Ble, target);
break;
case Operator.LessThanOrEqual:
- if (onTrue)
- if (isUnsigned)
+ if (on_true)
+ if (is_unsigned)
ig.Emit (OpCodes.Ble_Un, target);
else
ig.Emit (OpCodes.Ble, target);
else
- if (isUnsigned)
+ if (is_unsigned)
ig.Emit (OpCodes.Bgt_Un, target);
else
ig.Emit (OpCodes.Bgt, target);
case Operator.GreaterThanOrEqual:
- if (onTrue)
- if (isUnsigned)
+ if (on_true)
+ if (is_unsigned)
ig.Emit (OpCodes.Bge_Un, target);
else
ig.Emit (OpCodes.Bge, target);
else
- if (isUnsigned)
+ if (is_unsigned)
ig.Emit (OpCodes.Blt_Un, target);
else
ig.Emit (OpCodes.Blt, target);
break;
default:
- Console.WriteLine (oper);
- throw new Exception ("what is THAT");
+ throw new InternalErrorException (oper.ToString ());
}
}
public override void Emit (EmitContext ec)
+ {
+ EmitOperator (ec);
+ }
+
+ protected void EmitOperator (EmitContext ec)
{
ILGenerator ig = ec.ig;
- Type l = left.Type;
- OpCode opcode;
//
// Handle short-circuit operators differently
// than the rest
//
- if (oper == Operator.LogicalAnd) {
- Label load_zero = ig.DefineLabel ();
- Label end = ig.DefineLabel ();
-
- left.EmitBranchable (ec, load_zero, false);
- right.Emit (ec);
- ig.Emit (OpCodes.Br, end);
-
- ig.MarkLabel (load_zero);
- ig.Emit (OpCodes.Ldc_I4_0);
- ig.MarkLabel (end);
- return;
- } else if (oper == Operator.LogicalOr) {
- Label load_one = ig.DefineLabel ();
+ if ((oper & Operator.LogicalMask) != 0) {
+ Label load_result = ig.DefineLabel ();
Label end = ig.DefineLabel ();
- left.EmitBranchable (ec, load_one, true);
+ bool is_or = oper == Operator.LogicalOr;
+ left.EmitBranchable (ec, load_result, is_or);
right.Emit (ec);
- ig.Emit (OpCodes.Br, end);
+ ig.Emit (OpCodes.Br_S, end);
- ig.MarkLabel (load_one);
- ig.Emit (OpCodes.Ldc_I4_1);
+ ig.MarkLabel (load_result);
+ ig.Emit (is_or ? OpCodes.Ldc_I4_1 : OpCodes.Ldc_I4_0);
ig.MarkLabel (end);
return;
}
left.Emit (ec);
+
+ //
+ // Optimize zero-based operations
+ //
+ // TODO: Implement more optimizations, but it should probably go to PredefinedOperators
+ //
+ if ((oper & Operator.ShiftMask) != 0 || oper == Operator.Addition || oper == Operator.Subtraction) {
+ Constant rc = right as Constant;
+ if (rc != null && rc.IsDefaultValue) {
+ return;
+ }
+ }
+
right.Emit (ec);
- bool isUnsigned = is_unsigned (left.Type);
+ Type l = left.Type;
+ OpCode opcode;
+ bool is_unsigned = IsUnsigned (l);
switch (oper){
case Operator.Multiply:
if (ec.CheckState){
if (l == TypeManager.int32_type || l == TypeManager.int64_type)
opcode = OpCodes.Mul_Ovf;
- else if (isUnsigned)
+ else if (is_unsigned)
opcode = OpCodes.Mul_Ovf_Un;
else
opcode = OpCodes.Mul;
} else
opcode = OpCodes.Mul;
-
+
break;
-
+
case Operator.Division:
- if (isUnsigned)
+ if (is_unsigned)
opcode = OpCodes.Div_Un;
else
opcode = OpCodes.Div;
break;
-
+
case Operator.Modulus:
- if (isUnsigned)
+ if (is_unsigned)
opcode = OpCodes.Rem_Un;
else
opcode = OpCodes.Rem;
if (ec.CheckState){
if (l == TypeManager.int32_type || l == TypeManager.int64_type)
opcode = OpCodes.Add_Ovf;
- else if (isUnsigned)
+ else if (is_unsigned)
opcode = OpCodes.Add_Ovf_Un;
else
opcode = OpCodes.Add;
if (ec.CheckState){
if (l == TypeManager.int32_type || l == TypeManager.int64_type)
opcode = OpCodes.Sub_Ovf;
- else if (isUnsigned)
+ else if (is_unsigned)
opcode = OpCodes.Sub_Ovf_Un;
else
opcode = OpCodes.Sub;
break;
case Operator.RightShift:
- if (isUnsigned)
+ if (is_unsigned)
opcode = OpCodes.Shr_Un;
else
opcode = OpCodes.Shr;
break;
case Operator.LessThan:
- if (isUnsigned)
+ if (is_unsigned)
opcode = OpCodes.Clt_Un;
else
opcode = OpCodes.Clt;
break;
case Operator.GreaterThan:
- if (isUnsigned)
+ if (is_unsigned)
opcode = OpCodes.Cgt_Un;
else
opcode = OpCodes.Cgt;
case Operator.LessThanOrEqual:
Type lt = left.Type;
- if (isUnsigned || (lt == TypeManager.double_type || lt == TypeManager.float_type))
+ if (is_unsigned || (lt == TypeManager.double_type || lt == TypeManager.float_type))
ig.Emit (OpCodes.Cgt_Un);
else
ig.Emit (OpCodes.Cgt);
case Operator.GreaterThanOrEqual:
Type le = left.Type;
- if (isUnsigned || (le == TypeManager.double_type || le == TypeManager.float_type))
+ if (is_unsigned || (le == TypeManager.double_type || le == TypeManager.float_type))
ig.Emit (OpCodes.Clt_Un);
else
ig.Emit (OpCodes.Clt);
break;
default:
- throw new Exception ("This should not happen: Operator = "
- + oper.ToString ());
+ throw new InternalErrorException (oper.ToString ());
}
ig.Emit (opcode);
target.left = left.Clone (clonectx);
target.right = right.Clone (clonectx);
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ return CreateExpressionTree (ec, null);
+ }
+
+ Expression CreateExpressionTree (EmitContext ec, MethodGroupExpr method)
+ {
+ string method_name;
+ bool lift_arg = false;
+
+ switch (oper) {
+ case Operator.Addition:
+ if (method == null && ec.CheckState)
+ method_name = "AddChecked";
+ else
+ method_name = "Add";
+ break;
+ case Operator.BitwiseAnd:
+ method_name = "And";
+ break;
+ case Operator.Division:
+ method_name = "Divide";
+ break;
+ case Operator.Equality:
+ method_name = "Equal";
+ lift_arg = true;
+ break;
+ case Operator.ExclusiveOr:
+ method_name = "ExclusiveOr";
+ break;
+ case Operator.GreaterThan:
+ method_name = "GreaterThan";
+ lift_arg = true;
+ break;
+ case Operator.GreaterThanOrEqual:
+ method_name = "GreaterThanOrEqual";
+ lift_arg = true;
+ break;
+ case Operator.LessThan:
+ method_name = "LessThan";
+ break;
+ case Operator.LogicalAnd:
+ method_name = "AndAlso";
+ break;
+ case Operator.Inequality:
+ method_name = "NotEqual";
+ lift_arg = true;
+ break;
+ case Operator.RightShift:
+ method_name = "RightShift";
+ break;
+
+ case Operator.BitwiseOr:
+ method_name = "Or";
+ break;
+
+ case Operator.LogicalOr:
+ method_name = "OrElse";
+ break;
+ default:
+ throw new InternalErrorException ("Unknown expression tree binary operator " + oper);
+ }
+
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (left.CreateExpressionTree (ec)));
+ args.Add (new Argument (right.CreateExpressionTree (ec)));
+ if (method != null) {
+ if (lift_arg)
+ args.Add (new Argument (new BoolConstant (false, loc)));
+
+ args.Add (new Argument (method.CreateExpressionTree (ec)));
+ }
+
+ return CreateExpressionFactoryCall (method_name, args);
+ }
}
//
{
ILGenerator ig = ec.ig;
- if (Arguments != null)
- Invocation.EmitArguments (ec, method, Arguments, false, null);
+ Invocation.EmitArguments (ec, Arguments, false, null);
if (method is MethodInfo)
ig.Emit (OpCodes.Call, (MethodInfo) method);
// b, c, d... may be strings or objects.
//
public class StringConcat : Expression {
- ArrayList operands;
- bool invalid = false;
- bool emit_conv_done = false;
- //
- // Are we also concating objects?
- //
- bool is_strings_only = true;
+ ArrayList arguments;
public StringConcat (EmitContext ec, Location loc, Expression left, Expression right)
{
this.loc = loc;
type = TypeManager.string_type;
eclass = ExprClass.Value;
-
- operands = new ArrayList (2);
+
+ arguments = new ArrayList (2);
Append (ec, left);
Append (ec, right);
}
public override Expression DoResolve (EmitContext ec)
{
- if (invalid)
- return null;
-
return this;
}
//
StringConstant sc = operand as StringConstant;
if (sc != null) {
-// TODO: it will be better to do this silently as an optimalization
-// int i = 0;
-// string s = "" + i;
-// because this code has poor performace
-// if (sc.Value.Length == 0)
-// Report.Warning (-300, 3, Location, "Appending an empty string has no effect. Did you intend to append a space string?");
-
- if (operands.Count != 0) {
- StringConstant last_operand = operands [operands.Count - 1] as StringConstant;
- if (last_operand != null) {
- operands [operands.Count - 1] = new StringConstant (last_operand.Value + ((StringConstant) operand).Value, last_operand.Location);
+ if (arguments.Count != 0) {
+ Argument last_argument = (Argument) arguments [arguments.Count - 1];
+ StringConstant last_expr_constant = last_argument.Expr as StringConstant;
+ if (last_expr_constant != null) {
+ last_argument.Expr = new StringConstant (
+ last_expr_constant.Value + sc.Value, sc.Location);
return;
}
}
- }
-
-
- //
- // Multiple (3+) concatenation are resolved as multiple StringConcat instances
- //
- StringConcat concat_oper = operand as StringConcat;
- if (concat_oper != null) {
- operands.AddRange (concat_oper.operands);
- return;
- }
-
- //
- // Conversion to object
- //
- if (operand.Type != TypeManager.string_type) {
- Expression no = Convert.ImplicitConversion (ec, operand, TypeManager.object_type, loc);
-
- if (no == null) {
- Binary.Error_OperatorCannotBeApplied (loc, "+", TypeManager.string_type, operand.Type);
- invalid = true;
+ } else {
+ //
+ // Multiple (3+) concatenation are resolved as multiple StringConcat instances
+ //
+ StringConcat concat_oper = operand as StringConcat;
+ if (concat_oper != null) {
+ arguments.AddRange (concat_oper.arguments);
+ return;
}
- operand = no;
}
-
- operands.Add (operand);
+
+ arguments.Add (new Argument (operand));
+ }
+
+ Expression CreateConcatInvocation ()
+ {
+ return new Invocation (
+ new MemberAccess (new MemberAccess (new QualifiedAliasMember ("global", "System", loc), "String", loc), "Concat", loc),
+ arguments, true);
}
public override void Emit (EmitContext ec)
{
- MethodInfo concat_method = null;
-
- //
- // Do conversion to arguments; check for strings only
- //
-
- // This can get called multiple times, so we have to deal with that.
- if (!emit_conv_done) {
- emit_conv_done = true;
- for (int i = 0; i < operands.Count; i ++) {
- Expression e = (Expression) operands [i];
- is_strings_only &= e.Type == TypeManager.string_type;
- }
-
- for (int i = 0; i < operands.Count; i ++) {
- Expression e = (Expression) operands [i];
-
- if (! is_strings_only && e.Type == TypeManager.string_type) {
- // need to make sure this is an object, because the EmitParams
- // method might look at the type of this expression, see it is a
- // string and emit a string [] when we want an object [];
-
- e = EmptyCast.Create (e, TypeManager.object_type);
- }
- operands [i] = new Argument (e, Argument.AType.Expression);
- }
- }
-
- //
- // Find the right method
- //
- switch (operands.Count) {
- case 1:
- //
- // This should not be possible, because simple constant folding
- // is taken care of in the Binary code.
- //
- throw new Exception ("how did you get here?");
-
- case 2:
- concat_method = is_strings_only ?
- TypeManager.string_concat_string_string :
- TypeManager.string_concat_object_object ;
- break;
- case 3:
- concat_method = is_strings_only ?
- TypeManager.string_concat_string_string_string :
- TypeManager.string_concat_object_object_object ;
- break;
- case 4:
- //
- // There is not a 4 param overlaod for object (the one that there is
- // is actually a varargs methods, and is only in corlib because it was
- // introduced there before.).
- //
- if (!is_strings_only)
- goto default;
-
- concat_method = TypeManager.string_concat_string_string_string_string;
- break;
- default:
- concat_method = is_strings_only ?
- TypeManager.string_concat_string_dot_dot_dot :
- TypeManager.string_concat_object_dot_dot_dot ;
- break;
- }
-
- Invocation.EmitArguments (ec, concat_method, operands, false, null);
- ec.ig.Emit (OpCodes.Call, concat_method);
+ Expression concat = CreateConcatInvocation ();
+ concat = concat.Resolve (ec);
+ if (concat != null)
+ concat.Emit (ec);
}
}
{
ILGenerator ig = ec.ig;
- Invocation.EmitArguments (ec, method, args, false, null);
+ Invocation.EmitArguments (ec, args, false, null);
ig.Emit (OpCodes.Call, (MethodInfo) method);
ig.Emit (OpCodes.Castclass, type);
//
// User-defined conditional logical operator
+ //
public class ConditionalLogicalOperator : Expression {
Expression left, right;
bool is_and;
+ Expression op_true, op_false;
+ UserOperatorCall op;
+ LocalTemporary left_temp;
public ConditionalLogicalOperator (bool is_and, Expression left, Expression right, Type t, Location loc)
{
this.right = right;
this.is_and = is_and;
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args = new ArrayList (3);
+ args.Add (new Argument (left.CreateExpressionTree (ec)));
+ args.Add (new Argument (right.CreateExpressionTree (ec)));
+ args.Add (new Argument (op.Method.CreateExpressionTree (ec)));
+ return CreateExpressionFactoryCall (is_and ? "AndAlso" : "OrElse", args);
+ }
protected void Error19 ()
{
"declarations of operator true and operator false");
}
- Expression op_true, op_false, op;
- LocalTemporary left_temp;
-
public override Expression DoResolve (EmitContext ec)
{
MethodGroupExpr operator_group;
ArrayList arguments = new ArrayList (2);
arguments.Add (new Argument (left_temp, Argument.AType.Expression));
arguments.Add (new Argument (right, Argument.AType.Expression));
- operator_group = operator_group.OverloadResolve (ec, arguments, false, loc);
+ operator_group = operator_group.OverloadResolve (ec, ref arguments, false, loc);
if (operator_group == null) {
Error19 ();
return null;
return null;
}
- op = new StaticCallExpr (method, arguments, loc);
+ op = new UserOperatorCall (operator_group, arguments, null, loc);
op_true = GetOperatorTrue (ec, left_temp, loc);
op_false = GetOperatorFalse (ec, left_temp, loc);
/// Implements the ternary conditional operator (?:)
/// </summary>
public class Conditional : Expression {
- Expression expr, trueExpr, falseExpr;
+ Expression expr, true_expr, false_expr;
- public Conditional (Expression expr, Expression trueExpr, Expression falseExpr)
+ public Conditional (Expression expr, Expression true_expr, Expression false_expr)
{
this.expr = expr;
- this.trueExpr = trueExpr;
- this.falseExpr = falseExpr;
+ this.true_expr = true_expr;
+ this.false_expr = false_expr;
this.loc = expr.Location;
}
public Expression TrueExpr {
get {
- return trueExpr;
+ return true_expr;
}
}
public Expression FalseExpr {
get {
- return falseExpr;
+ return false_expr;
}
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args = new ArrayList (3);
+ args.Add (new Argument (expr.CreateExpressionTree (ec)));
+ args.Add (new Argument (true_expr.CreateExpressionTree (ec)));
+ args.Add (new Argument (false_expr.CreateExpressionTree (ec)));
+ return CreateExpressionFactoryCall ("Condition", args);
+ }
+
public override Expression DoResolve (EmitContext ec)
{
expr = expr.Resolve (ec);
if (expr == null)
return null;
-#if GMCS_SOURCE
- if (TypeManager.IsNullableValueType (expr.Type))
- return new Nullable.LiftedConditional (expr, trueExpr, falseExpr, loc).Resolve (ec);
-#endif
-
if (expr.Type != TypeManager.bool_type){
expr = Expression.ResolveBoolean (
ec, expr, loc);
Report.Warning (665, 3, loc, "Assignment in conditional expression is always constant; did you mean to use == instead of = ?");
}
- trueExpr = trueExpr.Resolve (ec);
- falseExpr = falseExpr.Resolve (ec);
+ true_expr = true_expr.Resolve (ec);
+ false_expr = false_expr.Resolve (ec);
- if (trueExpr == null || falseExpr == null)
+ if (true_expr == null || false_expr == null)
return null;
eclass = ExprClass.Value;
- if (trueExpr.Type == falseExpr.Type) {
- type = trueExpr.Type;
+ if (true_expr.Type == false_expr.Type) {
+ type = true_expr.Type;
if (type == TypeManager.null_type) {
// TODO: probably will have to implement ConditionalConstant
// to call method without return constant as well
Report.Warning (-101, 1, loc, "Conditional expression will always return same value");
- return trueExpr;
+ return true_expr;
}
} else {
Expression conv;
- Type true_type = trueExpr.Type;
- Type false_type = falseExpr.Type;
+ Type true_type = true_expr.Type;
+ Type false_type = false_expr.Type;
//
- // First, if an implicit conversion exists from trueExpr
- // to falseExpr, then the result type is of type falseExpr.Type
+ // First, if an implicit conversion exists from true_expr
+ // to false_expr, then the result type is of type false_expr.Type
//
- conv = Convert.ImplicitConversion (ec, trueExpr, false_type, loc);
+ conv = Convert.ImplicitConversion (ec, true_expr, false_type, loc);
if (conv != null){
//
// Check if both can convert implicitl to each other's type
//
- if (Convert.ImplicitConversion (ec, falseExpr, true_type, loc) != null){
+ if (Convert.ImplicitConversion (ec, false_expr, true_type, loc) != null){
Error (172,
"Can not compute type of conditional expression " +
- "as `" + TypeManager.CSharpName (trueExpr.Type) +
- "' and `" + TypeManager.CSharpName (falseExpr.Type) +
+ "as `" + TypeManager.CSharpName (true_expr.Type) +
+ "' and `" + TypeManager.CSharpName (false_expr.Type) +
"' convert implicitly to each other");
return null;
}
type = false_type;
- trueExpr = conv;
- } else if ((conv = Convert.ImplicitConversion(ec, falseExpr, true_type,loc))!= null){
+ true_expr = conv;
+ } else if ((conv = Convert.ImplicitConversion(ec, false_expr, true_type,loc))!= null){
type = true_type;
- falseExpr = conv;
+ false_expr = conv;
} else {
Report.Error (173, loc, "Type of conditional expression cannot be determined because there is no implicit conversion between `{0}' and `{1}'",
- trueExpr.GetSignatureForError (), falseExpr.GetSignatureForError ());
+ true_expr.GetSignatureForError (), false_expr.GetSignatureForError ());
return null;
}
}
if (expr is BoolConstant){
BoolConstant bc = (BoolConstant) expr;
- Report.Warning (429, 4, bc.Value ? falseExpr.Location : trueExpr.Location, "Unreachable expression code detected");
- return bc.Value ? trueExpr : falseExpr;
+ Report.Warning (429, 4, bc.Value ? false_expr.Location : true_expr.Location, "Unreachable expression code detected");
+ return bc.Value ? true_expr : false_expr;
}
return this;
Label end_target = ig.DefineLabel ();
expr.EmitBranchable (ec, false_target, false);
- trueExpr.Emit (ec);
+ true_expr.Emit (ec);
+
+ if (type.IsInterface) {
+ LocalBuilder temp = ec.GetTemporaryLocal (type);
+ ig.Emit (OpCodes.Stloc, temp);
+ ig.Emit (OpCodes.Ldloc, temp);
+ ec.FreeTemporaryLocal (temp, type);
+ }
+
ig.Emit (OpCodes.Br, end_target);
ig.MarkLabel (false_target);
- falseExpr.Emit (ec);
+ false_expr.Emit (ec);
ig.MarkLabel (end_target);
}
Conditional target = (Conditional) t;
target.expr = expr.Clone (clonectx);
- target.trueExpr = trueExpr.Clone (clonectx);
- target.falseExpr = falseExpr.Clone (clonectx);
+ target.true_expr = true_expr.Clone (clonectx);
+ target.false_expr = false_expr.Clone (clonectx);
}
}
source.Emit (ec);
+ // HACK: variable is already emitted when source is an initializer
+ if (source is NewInitialize)
+ return;
+
if (leave_copy) {
ig.Emit (OpCodes.Dup);
if (IsRef || Variable.NeedsTemporary) {
public bool IsAssigned (EmitContext ec, Location loc)
{
+ // HACK: Variables are not captured in probing mode
+ if (ec.IsInProbingMode)
+ return true;
+
if (!ec.DoFlowAnalysis || !is_out || ec.CurrentBranching.IsAssigned (VariableInfo))
return true;
return Name == pr.Name && referenced == pr.referenced;
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ return Parameter.ExpressionTreeVariableReference ();
+ }
+
//
// Notice that for ref/out parameters, the type exposed is not the
// same type exposed externally.
}
}
- public static string FullDesc (Argument a)
+ public string GetSignatureForError ()
{
- if (a.ArgType == AType.ArgList)
- return "__arglist";
+ if (Expr.eclass == ExprClass.MethodGroup)
+ return Expr.ExprClassName;
- return (a.ArgType == AType.Ref ? "ref " :
- (a.ArgType == AType.Out ? "out " : "")) +
- TypeManager.CSharpName (a.Expr.Type);
- }
+ return Expr.GetSignatureForError ();
+ }
public bool ResolveMethodGroup (EmitContext ec)
{
ml.AddressOf (ec, mode);
}
- public void EmitArrayArgument (EmitContext ec)
- {
- Type argtype = Expr.Type;
- Expr.Emit (ec);
-
- if (argtype == TypeManager.uint32_type)
- ec.ig.Emit (OpCodes.Conv_U);
- else if (argtype == TypeManager.int64_type)
- ec.ig.Emit (OpCodes.Conv_Ovf_I);
- else if (argtype == TypeManager.uint64_type)
- ec.ig.Emit (OpCodes.Conv_Ovf_I_Un);
- }
-
public Argument Clone (CloneContext clonectx)
{
return new Argument (Expr.Clone (clonectx), ArgType);
/// </summary>
public class Invocation : ExpressionStatement {
protected ArrayList Arguments;
- Expression expr;
- protected MethodGroupExpr mg;
-
- //
- // arguments is an ArrayList, but we do not want to typecast,
- // as it might be null.
- //
- public Invocation (Expression expr, ArrayList arguments)
- {
- SimpleName sn = expr as SimpleName;
- if (sn != null)
- this.expr = sn.GetMethodGroup ();
- else
- this.expr = expr;
-
- Arguments = arguments;
- loc = expr.Location;
- }
-
- public static string FullMethodDesc (MethodBase mb)
- {
- if (mb == null)
- return "";
-
- StringBuilder sb;
- if (mb is MethodInfo) {
- sb = new StringBuilder (TypeManager.CSharpName (((MethodInfo) mb).ReturnType));
- sb.Append (" ");
- }
- else
- sb = new StringBuilder ();
-
- sb.Append (TypeManager.CSharpSignature (mb));
- return sb.ToString ();
- }
-
- public static bool IsParamsMethodApplicable (EmitContext ec, MethodGroupExpr me,
- ArrayList arguments, int arg_count,
- ref MethodBase candidate)
- {
- return IsParamsMethodApplicable (
- ec, me, arguments, arg_count, false, ref candidate) ||
- IsParamsMethodApplicable (
- ec, me, arguments, arg_count, true, ref candidate);
-
-
- }
-
- static bool IsParamsMethodApplicable (EmitContext ec, MethodGroupExpr me,
- ArrayList arguments, int arg_count,
- bool do_varargs, ref MethodBase candidate)
- {
-#if GMCS_SOURCE
- if (!me.HasTypeArguments &&
- !TypeManager.InferParamsTypeArguments (ec, arguments, ref candidate))
- return false;
-
- if (TypeManager.IsGenericMethodDefinition (candidate))
- throw new InternalErrorException ("a generic method definition took part in overload resolution");
-#endif
-
- return IsParamsMethodApplicable (
- ec, arguments, arg_count, candidate, do_varargs);
- }
-
- /// <summary>
- /// Determines if the candidate method, if a params method, is applicable
- /// in its expanded form to the given set of arguments
- /// </summary>
- static bool IsParamsMethodApplicable (EmitContext ec, ArrayList arguments,
- int arg_count, MethodBase candidate,
- bool do_varargs)
- {
- ParameterData pd = TypeManager.GetParameterData (candidate);
-
- int pd_count = pd.Count;
- if (pd_count == 0)
- return false;
-
- int count = pd_count - 1;
- if (do_varargs) {
- if (pd.ParameterModifier (count) != Parameter.Modifier.ARGLIST)
- return false;
- if (pd_count != arg_count)
- return false;
-
- if (!(((Argument) arguments [count]).Expr is Arglist))
- return false;
- --pd_count;
- } else {
- if (!pd.HasParams)
- return false;
- }
-
- if (count > arg_count)
- return false;
-
- if (pd_count == 1 && arg_count == 0)
- return true;
-
- //
- // If we have come this far, the case which
- // remains is when the number of parameters is
- // less than or equal to the argument count.
- //
- int argument_index = 0;
- Argument a;
- for (int i = 0; i < pd_count; ++i) {
-
- if ((pd.ParameterModifier (i) & Parameter.Modifier.PARAMS) != 0) {
- Type element_type = TypeManager.GetElementType (pd.ParameterType (i));
- int params_args_count = arg_count - pd_count;
- if (params_args_count < 0)
- continue;
-
- do {
- a = (Argument) arguments [argument_index++];
-
- if (!Convert.ImplicitConversionExists (ec, a.Expr, element_type))
- return false;
- } while (params_args_count-- > 0);
- continue;
- }
-
- a = (Argument) arguments [argument_index++];
-
- Parameter.Modifier a_mod = a.Modifier &
- (unchecked (~(Parameter.Modifier.OUTMASK | Parameter.Modifier.REFMASK)));
- Parameter.Modifier p_mod = pd.ParameterModifier (i) &
- (unchecked (~(Parameter.Modifier.OUTMASK | Parameter.Modifier.REFMASK)));
-
- if (a_mod == p_mod) {
-
- if (a_mod == Parameter.Modifier.NONE)
- if (!Convert.ImplicitConversionExists (ec,
- a.Expr,
- pd.ParameterType (i)))
- return false;
-
- if ((a_mod & Parameter.Modifier.ISBYREF) != 0) {
- Type pt = pd.ParameterType (i);
-
- if (!pt.IsByRef)
- pt = TypeManager.GetReferenceType (pt);
-
- if (pt != a.Type)
- return false;
- }
- } else
- return false;
-
- }
-
- return true;
- }
-
- public static bool IsApplicable (EmitContext ec, MethodGroupExpr me,
- ArrayList arguments, int arg_count,
- ref MethodBase method)
- {
- MethodBase candidate = method;
-
-#if GMCS_SOURCE
- if (!me.HasTypeArguments &&
- !TypeManager.InferTypeArguments (ec, arguments, ref candidate))
- return false;
-
- if (TypeManager.IsGenericMethodDefinition (candidate))
- throw new InternalErrorException ("a generic method definition took part in overload resolution");
-#endif
-
- if (IsApplicable (ec, arguments, arg_count, candidate)) {
- method = candidate;
- return true;
- }
-
- return false;
- }
-
- /// <summary>
- /// Determines if the candidate method is applicable (section 14.4.2.1)
- /// to the given set of arguments
- /// </summary>
- public static bool IsApplicable (EmitContext ec, ArrayList arguments, int arg_count,
- MethodBase candidate)
- {
- ParameterData pd = TypeManager.GetParameterData (candidate);
-
- if (arg_count != pd.Count)
- return false;
-
- for (int i = arg_count; i > 0; ) {
- i--;
-
- Argument a = (Argument) arguments [i];
-
- Parameter.Modifier a_mod = a.Modifier &
- ~(Parameter.Modifier.OUTMASK | Parameter.Modifier.REFMASK);
-
- Parameter.Modifier p_mod = pd.ParameterModifier (i) &
- ~(Parameter.Modifier.OUTMASK | Parameter.Modifier.REFMASK | Parameter.Modifier.PARAMS);
-
- if (a_mod != p_mod)
- return false;
-
- Type pt = pd.ParameterType (i);
-
- if (TypeManager.IsEqual (pt, a.Type))
- continue;
-
- if (a_mod != Parameter.Modifier.NONE)
- return false;
-
- // FIXME: Kill this abomination (EmitContext.TempEc)
- EmitContext prevec = EmitContext.TempEc;
- EmitContext.TempEc = ec;
- try {
- if (!Convert.ImplicitConversionExists (ec, a.Expr, pt))
- return false;
- } finally {
- EmitContext.TempEc = prevec;
- }
- }
-
- return true;
+ Expression expr;
+ protected MethodGroupExpr mg;
+ bool arguments_resolved;
+
+ //
+ // arguments is an ArrayList, but we do not want to typecast,
+ // as it might be null.
+ //
+ public Invocation (Expression expr, ArrayList arguments)
+ {
+ SimpleName sn = expr as SimpleName;
+ if (sn != null)
+ this.expr = sn.GetMethodGroup ();
+ else
+ this.expr = expr;
+
+ Arguments = arguments;
+ loc = expr.Location;
}
- public static void Error_WrongNumArguments (Location loc, String name, int arg_count)
+ public Invocation (Expression expr, ArrayList arguments, bool arguments_resolved)
+ : this (expr, arguments)
{
- Report.Error (1501, loc, "No overload for method `{0}' takes `{1}' arguments",
- name, arg_count.ToString ());
+ this.arguments_resolved = arguments_resolved;
}
-
- static void Error_InvalidArguments (Location loc, int idx, MethodBase method,
- Type delegate_type, Argument a, ParameterData expected_par)
- {
- if (a is CollectionElementInitializer.ElementInitializerArgument) {
- Report.SymbolRelatedToPreviousError (method);
- if ((expected_par.ParameterModifier (idx) & Parameter.Modifier.ISBYREF) != 0) {
- Report.Error (1954, loc, "The best overloaded collection initalizer method `{0}' cannot have 'ref', or `out' modifier",
- TypeManager.CSharpSignature (method));
- return;
- }
- Report.Error (1950, loc, "The best overloaded collection initalizer method `{0}' has some invalid arguments",
- TypeManager.CSharpSignature (method));
- } else if (delegate_type == null) {
- Report.SymbolRelatedToPreviousError (method);
- Report.Error (1502, loc, "The best overloaded method match for `{0}' has some invalid arguments",
- TypeManager.CSharpSignature (method));
- } else
- Report.Error (1594, loc, "Delegate `{0}' has some invalid arguments",
- TypeManager.CSharpName (delegate_type));
-
- Parameter.Modifier mod = expected_par.ParameterModifier (idx);
- string index = (idx + 1).ToString ();
- if ((a.Modifier & Parameter.Modifier.ISBYREF) != 0 && mod != a.Modifier) {
- if ((mod & (Parameter.Modifier.REF | Parameter.Modifier.OUT)) == 0)
- Report.Error (1615, loc, "Argument `{0}' should not be passed with the `{1}' keyword",
- index, Parameter.GetModifierSignature (a.Modifier));
- else
- Report.Error (1620, loc, "Argument `{0}' must be passed with the `{1}' keyword",
- index, Parameter.GetModifierSignature (mod));
- } else {
- string p1 = Argument.FullDesc (a);
- string p2 = TypeManager.CSharpName (expected_par.ParameterType (idx));
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args;
- if (p1 == p2) {
- Report.ExtraInformation (loc, "(equally named types possibly from different assemblies in previous ");
- Report.SymbolRelatedToPreviousError (a.Expr.Type);
- Report.SymbolRelatedToPreviousError (expected_par.ParameterType (idx));
- }
- Report.Error (1503, loc, "Argument {0}: Cannot convert type `{1}' to `{2}'", index, p1, p2);
+ //
+ // Special conversion for nested expression trees
+ //
+ if (TypeManager.DropGenericTypeArguments (type) == TypeManager.expression_type) {
+ args = new ArrayList (1);
+ args.Add (new Argument (this));
+ return CreateExpressionFactoryCall ("Quote", args);
}
- }
-
- public static bool VerifyArgumentsCompat (EmitContext ec, ArrayList Arguments,
- int arg_count, MethodBase method,
- bool chose_params_expanded,
- Type delegate_type, bool may_fail,
- Location loc)
- {
- ParameterData pd = TypeManager.GetParameterData (method);
- int j;
- int a_idx = 0;
- Argument a = null;
- for (j = 0; j < pd.Count; j++) {
- Type parameter_type = pd.ParameterType (j);
- Parameter.Modifier pm = pd.ParameterModifier (j);
-
- if (pm == Parameter.Modifier.ARGLIST) {
- a = (Argument) Arguments [a_idx];
- if (!(a.Expr is Arglist))
- break;
- ++a_idx;
- continue;
- }
-
- int params_arg_count = 1;
- if (pm == Parameter.Modifier.PARAMS) {
- pm = Parameter.Modifier.NONE;
- params_arg_count = arg_count - pd.Count + 1;
- if (chose_params_expanded)
- parameter_type = TypeManager.GetElementType (parameter_type);
- }
-
- while (params_arg_count > 0) {
- a = (Argument) Arguments [a_idx];
- if (pm != a.Modifier)
- break;
-
- if (!TypeManager.IsEqual (a.Type, parameter_type)) {
- if (pm == Parameter.Modifier.OUT || pm == Parameter.Modifier.REF)
- break;
-
- Expression conv = Convert.ImplicitConversion (ec, a.Expr, parameter_type, loc);
- if (conv == null)
- break;
- // Update the argument with the implicit conversion
- if (a.Expr != conv)
- a.Expr = conv;
- }
-
- --params_arg_count;
- ++a_idx;
- }
- if (params_arg_count > 0)
- break;
+ args = new ArrayList (Arguments.Count + 3);
+ if (mg.IsInstance)
+ args.Add (new Argument (mg.InstanceExpression.CreateExpressionTree (ec)));
+ else
+ args.Add (new Argument (new NullLiteral (loc).CreateExpressionTree (ec)));
- if (parameter_type.IsPointer && !ec.InUnsafe) {
- if (!may_fail)
- UnsafeError (loc);
- return false;
- }
+ args.Add (new Argument (mg.CreateExpressionTree (ec)));
+ foreach (Argument a in Arguments) {
+ Expression e = a.Expr.CreateExpressionTree (ec);
+ if (e != null)
+ args.Add (new Argument (e));
}
- if (a_idx == arg_count)
- return true;
-
- if (!may_fail)
- Error_InvalidArguments (loc, a_idx, method, delegate_type, a, pd);
- return false;
+ return CreateExpressionFactoryCall ("Call", args);
}
public override Expression DoResolve (EmitContext ec)
{
+ // Don't resolve already resolved expression
+ if (eclass != ExprClass.Invalid)
+ return this;
+
Expression expr_resolved = expr.Resolve (ec, ResolveFlags.VariableOrValue | ResolveFlags.MethodGroup);
if (expr_resolved == null)
return null;
return (new DelegateInvocation (
expr_resolved, Arguments, loc)).Resolve (ec);
}
- expr.Error_UnexpectedKind (ResolveFlags.MethodGroup, loc);
- return null;
+
+ MemberExpr me = expr_resolved as MemberExpr;
+ if (me == null) {
+ expr_resolved.Error_UnexpectedKind (ResolveFlags.MethodGroup, loc);
+ return null;
+ }
+
+ mg = ec.TypeContainer.LookupExtensionMethod (me.Type, me.Name);
+ if (mg == null) {
+ Report.Error (1955, loc, "The member `{0}' cannot be used as method or delegate",
+ expr_resolved.GetSignatureForError ());
+ return null;
+ }
+
+ ((ExtensionMethodGroupExpr)mg).ExtensionExpression = me.InstanceExpression;
}
//
// Next, evaluate all the expressions in the argument list
//
- if (Arguments != null){
- foreach (Argument a in Arguments){
- if (!a.Resolve (ec, loc))
+ if (Arguments != null && !arguments_resolved) {
+ for (int i = 0; i < Arguments.Count; ++i)
+ {
+ if (!((Argument)Arguments[i]).Resolve(ec, loc))
return null;
}
}
MethodInfo method = (MethodInfo)mg;
if (method != null) {
type = TypeManager.TypeToCoreType (method.ReturnType);
+
+ // TODO: this is a copy of mg.ResolveMemberAccess method
Expression iexpr = mg.InstanceExpression;
if (method.IsStatic) {
- if (iexpr == null ||
- iexpr is This || iexpr is EmptyExpression ||
- mg.IdenticalTypeName) {
+ if (iexpr == null ||
+ iexpr is This || iexpr is EmptyExpression ||
+ mg.IdenticalTypeName) {
mg.InstanceExpression = null;
} else {
MemberExpr.error176 (loc, mg.GetSignatureForError ());
return null;
}
- } else {
- if (iexpr == null || iexpr is EmptyExpression) {
- SimpleName.Error_ObjectRefRequired (ec, loc, mg.GetSignatureForError ());
- return null;
- }
}
}
return null;
}
- if (mg.InstanceExpression != null){
- mg.InstanceExpression.CheckMarshalByRefAccess ();
-
- //
- // This is used to check that no methods are called in struct
- // constructors before all the fields on the struct have been
- // initialized.
- //
- if (!method.IsStatic){
- This mgthis = mg.InstanceExpression as This;
- if (mgthis != null){
- if (!mgthis.CheckThisUsage (ec))
- return null;
- }
- }
- }
+ if (mg.InstanceExpression != null)
+ mg.InstanceExpression.CheckMarshalByRefAccess (ec);
eclass = ExprClass.Value;
return this;
protected virtual MethodGroupExpr DoResolveOverload (EmitContext ec)
{
- return mg.OverloadResolve (ec, Arguments, false, loc);
+ return mg.OverloadResolve (ec, ref Arguments, false, loc);
}
bool IsSpecialMethodInvocation (MethodBase method)
return true;
}
- // <summary>
- // Emits the list of arguments as an array
- // </summary>
- static void EmitParams (EmitContext ec, ArrayList arguments, int idx, int count)
- {
- ILGenerator ig = ec.ig;
- Type t = null;
- for (int j = 0; j < count; j++){
- Argument a = (Argument) arguments [j + idx];
- if (j == 0) {
- t = a.Expr.Type;
- IntConstant.EmitInt (ig, count);
- ig.Emit (OpCodes.Newarr, TypeManager.TypeToCoreType (t));
- }
-
- ig.Emit (OpCodes.Dup);
- IntConstant.EmitInt (ig, j);
-
- bool is_stobj, has_type_arg;
- OpCode op = ArrayAccess.GetStoreOpcode (t, out is_stobj, out has_type_arg);
- if (is_stobj)
- ig.Emit (OpCodes.Ldelema, t);
-
- a.Emit (ec);
-
- if (has_type_arg)
- ig.Emit (op, t);
- else
- ig.Emit (op);
- }
- }
-
/// <summary>
/// Emits a list of resolved Arguments that are in the arguments
/// ArrayList.
/// which will be duplicated before any other args. Only EmitCall
/// should be using this interface.
/// </summary>
- public static void EmitArguments (EmitContext ec, MethodBase mb, ArrayList arguments, bool dup_args, LocalTemporary this_arg)
+ public static void EmitArguments (EmitContext ec, ArrayList arguments, bool dup_args, LocalTemporary this_arg)
{
- ParameterData pd = mb == null ? null : TypeManager.GetParameterData (mb);
- int top = pd.Count;
+ if (arguments == null)
+ return;
+
+ int top = arguments.Count;
LocalTemporary [] temps = null;
if (dup_args && top != 0)
int argument_index = 0;
Argument a;
- for (int i = 0; i < top; i++){
- if (pd != null){
- if (pd.ParameterModifier (i) == Parameter.Modifier.PARAMS){
- Type p_type = pd.ParameterType (i);
- int params_args_count = arguments == null ?
- 0 : arguments.Count - top + 1;
-
- // Fill not provided argument
- if (params_args_count <= 0) {
- ILGenerator ig = ec.ig;
- IntConstant.EmitInt (ig, 0);
- ig.Emit (OpCodes.Newarr, TypeManager.GetElementType (p_type));
- } else {
- //
- // Special case if we are passing the same data as the
- // params argument, we do not need to recreate an array.
- //
- a = (Argument) arguments [argument_index];
- if (params_args_count == 1 && p_type == a.Type) {
- ++argument_index;
- a.Emit (ec);
- } else {
- EmitParams (ec, arguments, i, params_args_count);
- argument_index += params_args_count;
- }
- }
-
- if (dup_args) {
- ec.ig.Emit (OpCodes.Dup);
- temps [i] = new LocalTemporary (p_type);
- temps [i].Store (ec);
- }
- continue;
- }
- }
-
+ for (int i = 0; i < top; i++) {
a = (Argument) arguments [argument_index++];
a.Emit (ec);
if (dup_args) {
/// <summary>
/// This checks the ConditionalAttribute on the method
/// </summary>
- static bool IsMethodExcluded (MethodBase method)
+ public static bool IsMethodExcluded (MethodBase method)
{
if (method.IsConstructor)
return false;
- IMethodData md = TypeManager.GetMethod (method);
- if (md != null)
- return md.IsExcluded ();
+ method = TypeManager.DropGenericMethodArguments (method);
+ if (method.DeclaringType.Module == CodeGen.Module.Builder) {
+ IMethodData md = TypeManager.GetMethod (method);
+ if (md != null)
+ return md.IsExcluded ();
- // For some methods (generated by delegate class) GetMethod returns null
- // because they are not included in builder_to_method table
- if (method.DeclaringType is TypeBuilder)
+ // For some methods (generated by delegate class) GetMethod returns null
+ // because they are not included in builder_to_method table
return false;
+ }
return AttributeTester.IsConditionalMethodExcluded (method);
}
Type decl_type = method.DeclaringType;
- if (!RootContext.StdLib) {
- // Replace any calls to the system's System.Array type with calls to
- // the newly created one.
- if (method == TypeManager.system_int_array_get_length)
- method = TypeManager.int_array_get_length;
- else if (method == TypeManager.system_int_array_get_rank)
- method = TypeManager.int_array_get_rank;
- else if (method == TypeManager.system_object_array_clone)
- method = TypeManager.object_array_clone;
- else if (method == TypeManager.system_int_array_get_length_int)
- method = TypeManager.int_array_get_length_int;
- else if (method == TypeManager.system_int_array_get_lower_bound_int)
- method = TypeManager.int_array_get_lower_bound_int;
- else if (method == TypeManager.system_int_array_get_upper_bound_int)
- method = TypeManager.int_array_get_upper_bound_int;
- else if (method == TypeManager.system_void_array_copyto_array_int)
- method = TypeManager.void_array_copyto_array_int;
- }
-
if (!ec.IsInObsoleteScope) {
//
// This checks ObsoleteAttribute on the method and on the declaring type
}
if (!omit_args)
- EmitArguments (ec, method, Arguments, dup_args, this_arg);
+ EmitArguments (ec, Arguments, dup_args, this_arg);
#if GMCS_SOURCE
if ((instance_expr != null) && (instance_expr.Type.IsGenericParameter))
// If set, the new expression is for a value_target, and
// we will not leave anything on the stack.
//
- Expression value_target;
- bool value_target_set = false;
+ protected Expression value_target;
+ protected bool value_target_set;
bool is_type_parameter = false;
public New (Expression requested_type, ArrayList arguments, Location l)
loc = l;
}
- public bool SetValueTypeVariable (Expression value)
+ public bool SetTargetVariable (Expression value)
{
value_target = value;
value_target_set = true;
if (t == TypeManager.decimal_type)
return new DecimalConstant (0, Location.Null);
if (TypeManager.IsEnumType (t))
- return new EnumConstant (Constantify (TypeManager.EnumToUnderlying (t)), t);
+ return new EnumConstant (Constantify (TypeManager.GetEnumUnderlyingType (t)), t);
return null;
}
return null;
}
+ if (TypeManager.activator_create_instance == null) {
+ Type activator_type = TypeManager.CoreLookupType ("System", "Activator", Kind.Class, true);
+ if (activator_type != null) {
+ TypeManager.activator_create_instance = TypeManager.GetPredefinedMethod (
+ activator_type, "CreateInstance", loc, Type.EmptyTypes);
+ }
+ }
+
is_type_parameter = true;
eclass = ExprClass.Value;
return this;
return null;
}
- method = method.OverloadResolve (ec, Arguments, false, loc);
+ method = method.OverloadResolve (ec, ref Arguments, false, loc);
if (method == null)
return null;
}
+ public virtual bool HasInitializer {
+ get {
+ return false;
+ }
+ }
+
public void AddressOf (EmitContext ec, AddressOp Mode)
{
if (is_type_parameter) {
{
Error (178, "Invalid rank specifier: expected `,' or `]'");
}
+
+ protected override void Error_NegativeArrayIndex (Location loc)
+ {
+ Report.Error (248, loc, "Cannot create an array with a negative size");
+ }
bool CheckIndices (EmitContext ec, ArrayList probe, int idx, bool specified_dims)
{
return true;
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ if (dimensions != 1) {
+ Report.Error (838, loc, "An expression tree cannot contain a multidimensional array initializer");
+ return null;
+ }
+
+ ArrayList args = new ArrayList (array_data == null ? 1 : array_data.Count + 1);
+ args.Add (new Argument (new TypeOf (new TypeExpression (array_element_type, loc), loc)));
+ if (array_data != null) {
+ foreach (Expression e in array_data)
+ args.Add (new Argument (e.CreateExpressionTree (ec)));
+ }
+
+ return CreateExpressionFactoryCall ("NewArrayInit", args);
+ }
public void UpdateIndices ()
{
foreach (Argument a in arguments){
if (!a.Resolve (ec, loc))
- return null;
-
- Expression real_arg = ExpressionToArrayArgument (ec, a.Expr, loc);
- if (real_arg == null)
- return null;
+ continue;
- a.Expr = real_arg;
+ a.Expr = ConvertExpressionToArrayIndex (ec, a.Expr);
}
eclass = ExprClass.Value;
byte [] element;
int count = array_data.Count;
- if (array_element_type.IsEnum)
- array_element_type = TypeManager.EnumToUnderlying (array_element_type);
+ if (TypeManager.IsEnumType (array_element_type))
+ array_element_type = TypeManager.GetEnumUnderlyingType (array_element_type);
factor = GetTypeSize (array_element_type);
if (factor == 0)
//
void EmitStaticInitializers (EmitContext ec)
{
+ // FIXME: This should go to Resolve !
+ if (TypeManager.void_initializearray_array_fieldhandle == null) {
+ TypeManager.void_initializearray_array_fieldhandle = TypeManager.GetPredefinedMethod (
+ TypeManager.runtime_helpers_type, "InitializeArray", loc,
+ TypeManager.array_type, TypeManager.runtime_field_handle_type);
+ if (TypeManager.void_initializearray_array_fieldhandle == null)
+ return;
+ }
+
//
// First, the static data
//
}
}
- void EmitArrayArguments (EmitContext ec)
- {
- foreach (Argument a in arguments)
- a.EmitArrayArgument (ec);
- }
-
public override void Emit (EmitContext ec)
{
ILGenerator ig = ec.ig;
-
- EmitArrayArguments (ec);
+
+ foreach (Argument a in arguments)
+ a.Emit (ec);
+
if (arguments.Count == 1)
ig.Emit (OpCodes.Newarr, array_element_type);
else {
}
}
- public override bool GetAttributableValue (Type valueType, out object value)
+ public override bool GetAttributableValue (Type value_type, out object value)
{
if (arguments.Count != 1) {
// Report.Error (-211, Location, "attribute can not encode multi-dimensional arrays");
if (initializers != null){
target.initializers = new ArrayList (initializers.Count);
- foreach (Expression initializer in initializers)
- target.initializers.Add (initializer.Clone (clonectx));
+ foreach (object initializer in initializers)
+ if (initializer is ArrayList) {
+ ArrayList this_al = (ArrayList)initializer;
+ ArrayList al = new ArrayList (this_al.Count);
+ target.initializers.Add (al);
+ foreach (Expression e in this_al)
+ al.Add (e.Clone (clonectx));
+ } else {
+ target.initializers.Add (((Expression)initializer).Clone (clonectx));
+ }
}
}
}
public ImplicitlyTypedArrayCreation (string rank, ArrayList initializers, Location loc)
: base (null, rank, initializers, loc)
{
+ if (RootContext.Version <= LanguageVersion.ISO_2)
+ Report.FeatureIsNotAvailable (loc, "implicitly typed arrays");
+
if (rank.Length > 2) {
while (rank [++dimensions] == ',');
} else {
"Consider copying `this' to a local variable " +
"outside the anonymous method and using the " +
"local instead.");
- return false;
}
RootScopeInfo host = block.Toplevel.RootScope;
//
// Called from Invocation to check if the invocation is correct
//
- public bool CheckThisUsage (EmitContext ec)
+ public override void CheckMarshalByRefAccess (EmitContext ec)
{
if ((variable_info != null) && !(type.IsValueType && ec.OmitStructFlowAnalysis) &&
!variable_info.IsAssigned (ec)) {
Error (188, "The `this' object cannot be used before all of its " +
"fields are assigned to");
variable_info.SetAssigned (ec);
- return false;
}
+ }
- return true;
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (this));
+ args.Add (new Argument (new TypeOf (new TypeExpression (type, loc), loc)));
+ return CreateExpressionFactoryCall ("Constant", args);
}
public override Expression DoResolve (EmitContext ec)
Error (27, "Keyword `this' is not available in the current context");
return null;
}
-
+
return this;
}
return retval;
}
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ Report.Error (1952, loc, "An expression tree cannot contain a method with variable arguments");
+ return null;
+ }
public override Expression DoResolve (EmitContext ec)
{
}
type = TypeManager.type_type;
+
+ return DoResolveBase ();
+ }
+
+ protected Expression DoResolveBase ()
+ {
+ if (TypeManager.system_type_get_type_from_handle == null) {
+ TypeManager.system_type_get_type_from_handle = TypeManager.GetPredefinedMethod (
+ TypeManager.type_type, "GetTypeFromHandle", loc, TypeManager.runtime_handle_type);
+ }
+
// Even though what is returned is a type object, it's treated as a value by the compiler.
// In particular, 'typeof (Foo).X' is something totally different from 'Foo.X'.
eclass = ExprClass.Value;
ec.ig.Emit (OpCodes.Call, TypeManager.system_type_get_type_from_handle);
}
- public override bool GetAttributableValue (Type valueType, out object value)
+ public override bool GetAttributableValue (Type value_type, out object value)
{
if (TypeManager.ContainsGenericParameters (typearg) &&
!TypeManager.IsGenericTypeDefinition (typearg)) {
return false;
}
- if (valueType == TypeManager.object_type) {
+ if (value_type == TypeManager.object_type) {
value = (object)typearg;
return true;
}
{
type = TypeManager.type_type;
typearg = TypeManager.void_type;
- // See description in TypeOf.
+
+ return DoResolveBase ();
+ }
+ }
+
+ internal class TypeOfMethod : Expression
+ {
+ readonly MethodInfo method;
+
+ public TypeOfMethod (MethodInfo method, Location loc)
+ {
+ this.method = method;
+ this.loc = loc;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ if (TypeManager.methodbase_get_type_from_handle == null) {
+ Type t = TypeManager.CoreLookupType ("System.Reflection", "MethodBase", Kind.Class, true);
+ Type handle_type = TypeManager.CoreLookupType ("System", "RuntimeMethodHandle", Kind.Class, true);
+
+ if (t != null && handle_type != null)
+ TypeManager.methodbase_get_type_from_handle = TypeManager.GetPredefinedMethod (t,
+ "GetMethodFromHandle", loc, handle_type);
+ }
+
+ type = typeof (MethodBase);
eclass = ExprClass.Value;
return this;
}
+
+ public override void Emit (EmitContext ec)
+ {
+ ec.ig.Emit (OpCodes.Ldtoken, method);
+ ec.ig.Emit (OpCodes.Call, TypeManager.methodbase_get_type_from_handle);
+ }
}
/// <summary>
#endif
type_queried = texpr.Type;
- if (type_queried.IsEnum)
- type_queried = TypeManager.EnumToUnderlying (type_queried);
+ if (TypeManager.IsEnumType (type_queried))
+ type_queried = TypeManager.GetEnumUnderlyingType (type_queried);
if (type_queried == TypeManager.void_type) {
Expression.Error_VoidInvalidInTheContext (loc);
public QualifiedAliasMember (string alias, string identifier, Location l)
{
- if (RootContext.Version == LanguageVersion.ISO_1)
- Report.FeatureIsNotISO1 (l, "namespace alias qualifier");
-
this.alias = alias;
this.identifier = identifier;
loc = l;
"System.NullReferenceException");
}
+ if (args != null) {
+ if (!args.Resolve (ec))
+ return null;
+ }
+
Expression member_lookup;
member_lookup = MemberLookup (
ec.ContainerType, expr_type, expr_type, Identifier, loc);
}
#endif
if (member_lookup == null) {
- ExtensionMethodGroupExpr ex_method_lookup = ec.TypeContainer.LookupExtensionMethod (expr_type, Identifier);
- if (ex_method_lookup != null) {
- ex_method_lookup.ExtensionExpression = expr_resolved;
+ ExprClass expr_eclass = expr_resolved.eclass;
- if (args != null)
- return ex_method_lookup.ResolveGeneric (ec, args);
+ //
+ // Extension methods are not allowed on all expression types
+ //
+ if (expr_eclass == ExprClass.Value || expr_eclass == ExprClass.Variable ||
+ expr_eclass == ExprClass.IndexerAccess || expr_eclass == ExprClass.PropertyAccess ||
+ expr_eclass == ExprClass.EventAccess) {
+ ExtensionMethodGroupExpr ex_method_lookup = ec.TypeContainer.LookupExtensionMethod (expr_type, Identifier);
+ if (ex_method_lookup != null) {
+ ex_method_lookup.ExtensionExpression = expr_resolved;
+
+ if (args != null) {
+ ex_method_lookup.SetTypeArguments (args);
+ }
- return ex_method_lookup.DoResolve (ec);
+ return ex_method_lookup.DoResolve (ec);
+ }
}
- if (!ec.IsInProbingMode)
- Error_MemberLookupFailed (
- ec.ContainerType, expr_type, expr_type, Identifier, null,
- AllMemberTypes, AllBindingFlags);
+ expr = expr_resolved;
+ Error_MemberLookupFailed (
+ ec.ContainerType, expr_type, expr_type, Identifier, null,
+ AllMemberTypes, AllBindingFlags);
return null;
}
}
MemberExpr me = (MemberExpr) member_lookup;
- member_lookup = me.ResolveMemberAccess (ec, expr_resolved, loc, original);
- if (member_lookup == null)
- return me;
+ me = me.ResolveMemberAccess (ec, expr_resolved, loc, original);
+ if (me == null)
+ return null;
if (args != null) {
- MethodGroupExpr mg = member_lookup as MethodGroupExpr;
- if (mg == null)
- throw new InternalErrorException ();
-
- return mg.ResolveGeneric (ec, args);
+ me.SetTypeArguments (args);
}
if (original != null && !TypeManager.IsValueType (expr_type)) {
- me = member_lookup as MemberExpr;
- if (me != null && me.IsInstance) {
+ if (me.IsInstance) {
LocalVariableReference var = expr_resolved as LocalVariableReference;
if (var != null && !var.VerifyAssigned (ec))
return null;
// check.
if (right_side != null)
- return member_lookup.DoResolveLValue (ec, right_side);
+ return me.DoResolveLValue (ec, right_side);
else
- return member_lookup.DoResolve (ec);
+ return me.DoResolve (ec);
}
public override Expression DoResolve (EmitContext ec)
if (silent)
return null;
- member_lookup = MemberLookup(
- rc.DeclContainer.TypeBuilder, expr_type, expr_type, LookupIdentifier,
- MemberTypes.All, BindingFlags.Public | BindingFlags.NonPublic, loc);
+ member_lookup = MemberLookup (
+ rc.DeclContainer.TypeBuilder, expr_type, expr_type, SimpleName.RemoveGenericArity (LookupIdentifier),
+ MemberTypes.NestedType, BindingFlags.Public | BindingFlags.NonPublic, loc);
+
+ if (member_lookup != null) {
+ tnew_expr = member_lookup.ResolveAsTypeTerminal (rc, false);
+ if (tnew_expr == null)
+ return null;
+
+ Namespace.Error_TypeArgumentsCannotBeUsed (tnew_expr.Type, loc);
+ return null;
+ }
+
+ member_lookup = MemberLookup (
+ rc.DeclContainer.TypeBuilder, expr_type, expr_type, LookupIdentifier,
+ MemberTypes.All, BindingFlags.Public | BindingFlags.NonPublic, loc);
- if (member_lookup == null) {
+ if (member_lookup == null) {
Report.Error (426, loc, "The nested type `{0}' does not exist in the type `{1}'",
- Identifier, new_expr.GetSignatureForError ());
+ Identifier, new_expr.GetSignatureForError ());
} else {
- // TODO: Report.SymbolRelatedToPreviousError
- member_lookup.Error_UnexpectedKind (null, "type", loc);
- }
+ // TODO: Report.SymbolRelatedToPreviousError
+ member_lookup.Error_UnexpectedKind (null, "type", loc);
+ }
return null;
}
#if GMCS_SOURCE
TypeArguments the_args = args;
- if (TypeManager.HasGenericArguments (expr_type)) {
- Type[] decl_args = TypeManager.GetTypeArguments (expr_type);
-
+ Type declaring_type = texpr.Type.DeclaringType;
+ if (TypeManager.HasGenericArguments (declaring_type)) {
+ while (!TypeManager.IsEqual (TypeManager.DropGenericTypeArguments (expr_type), declaring_type)) {
+ expr_type = expr_type.BaseType;
+ }
+
TypeArguments new_args = new TypeArguments (loc);
- foreach (Type decl in decl_args)
+ foreach (Type decl in TypeManager.GetTypeArguments (expr_type))
new_args.Add (new TypeExpression (decl, loc));
if (args != null)
throw new Exception ("Should not happen");
}
+ protected override void Error_TypeDoesNotContainDefinition (Type type, string name)
+ {
+ if (RootContext.Version > LanguageVersion.ISO_2 &&
+ ((expr.eclass & (ExprClass.Value | ExprClass.Variable)) != 0)) {
+ Report.Error (1061, loc, "Type `{0}' does not contain a definition for `{1}' and no " +
+ "extension method `{1}' of type `{0}' could be found " +
+ "(are you missing a using directive or an assembly reference?)",
+ TypeManager.CSharpName (type), name);
+ return;
+ }
+
+ base.Error_TypeDoesNotContainDefinition (type, name);
+ }
+
public override string ToString ()
{
return expr + "." + MemberName.MakeName (Identifier, args);
Expr = e;
loc = l;
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ using (ec.With (EmitContext.Flags.AllCheckStateFlags, true))
+ return Expr.CreateExpressionTree (ec);
+ }
public override Expression DoResolve (EmitContext ec)
{
Expr.Emit (ec);
}
- public override void EmitBranchable (EmitContext ec, Label target, bool onTrue)
+ public override void EmitBranchable (EmitContext ec, Label target, bool on_true)
{
using (ec.With (EmitContext.Flags.AllCheckStateFlags, true))
- Expr.EmitBranchable (ec, target, onTrue);
+ Expr.EmitBranchable (ec, target, on_true);
}
protected override void CloneTo (CloneContext clonectx, Expression t)
Expr = e;
loc = l;
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ using (ec.With (EmitContext.Flags.AllCheckStateFlags, false))
+ return Expr.CreateExpressionTree (ec);
+ }
public override Expression DoResolve (EmitContext ec)
{
Expr.Emit (ec);
}
- public override void EmitBranchable (EmitContext ec, Label target, bool onTrue)
+ public override void EmitBranchable (EmitContext ec, Label target, bool on_true)
{
using (ec.With (EmitContext.Flags.AllCheckStateFlags, false))
- Expr.EmitBranchable (ec, target, onTrue);
+ Expr.EmitBranchable (ec, target, on_true);
}
protected override void CloneTo (CloneContext clonectx, Expression t)
return Expr != null;
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args = new ArrayList (Arguments.Count + 1);
+ args.Add (new Argument (Expr.CreateExpressionTree (ec)));
+ foreach (Argument a in Arguments)
+ args.Add (new Argument (a.Expr.CreateExpressionTree (ec)));
+
+ return CreateExpressionFactoryCall ("ArrayIndex", args);
+ }
+
Expression MakePointerAccess (EmitContext ec, Type t)
{
if (t == TypeManager.void_ptr_type){
if (!CommonResolve (ec))
return null;
- Type t = Expr.Type;
- if (t.IsArray)
+ type = Expr.Type;
+ if (type.IsArray)
return (new ArrayAccess (this, loc)).DoResolveLValue (ec, right_side);
- if (t.IsPointer)
- return MakePointerAccess (ec, t);
+ if (type.IsPointer)
+ return MakePointerAccess (ec, type);
+
+ if (Expr.eclass != ExprClass.Variable && type.IsValueType)
+ Error_CannotModifyIntermediateExpressionValue (ec);
return (new IndexerAccess (this, loc)).DoResolveLValue (ec, right_side);
}
throw new Exception ("Should never be reached");
}
+ public override string GetSignatureForError ()
+ {
+ return Expr.GetSignatureForError ();
+ }
+
protected override void CloneTo (CloneContext clonectx, Expression t)
{
ElementAccess target = (ElementAccess) t;
loc = l;
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ return ea.CreateExpressionTree (ec);
+ }
+
public override Expression DoResolveLValue (EmitContext ec, Expression right_side)
{
return DoResolve (ec);
#endif
Type t = ea.Expr.Type;
- if (t.GetArrayRank () != ea.Arguments.Count){
+ int rank = ea.Arguments.Count;
+ if (t.GetArrayRank () != rank) {
Report.Error (22, ea.Location, "Wrong number of indexes `{0}' inside [], expected `{1}'",
ea.Arguments.Count.ToString (), t.GetArrayRank ().ToString ());
return null;
}
- type = TypeManager.GetElementType (t);
- if (type.IsPointer && !ec.InUnsafe){
- UnsafeError (ea.Location);
- return null;
+ if (rank != 1 && TypeManager.int_getlength_int == null) {
+ TypeManager.int_getlength_int = TypeManager.GetPredefinedMethod (
+ TypeManager.array_type, "GetLength", loc, TypeManager.int32_type);
}
- foreach (Argument a in ea.Arguments){
- Type argtype = a.Type;
-
- if (argtype == TypeManager.int32_type ||
- argtype == TypeManager.uint32_type ||
- argtype == TypeManager.int64_type ||
- argtype == TypeManager.uint64_type) {
- Constant c = a.Expr as Constant;
- if (c != null && c.IsNegative) {
- Report.Warning (251, 2, ea.Location, "Indexing an array with a negative index (array indices always start at zero)");
- }
- continue;
- }
-
- //
- // Mhm. This is strage, because the Argument.Type is not the same as
- // Argument.Expr.Type: the value changes depending on the ref/out setting.
- //
- // Wonder if I will run into trouble for this.
- //
- a.Expr = ExpressionToArrayArgument (ec, a.Expr, ea.Location);
- if (a.Expr == null)
- return null;
+ type = TypeManager.GetElementType (t);
+ if (type.IsPointer && !ec.InUnsafe) {
+ UnsafeError (ea.Location);
+ return null;
+ }
+
+ foreach (Argument a in ea.Arguments) {
+ a.Expr = ConvertExpressionToArrayIndex (ec, a.Expr);
}
eclass = ExprClass.Variable;
else if (type == TypeManager.intptr_type)
ig.Emit (OpCodes.Ldelem_I);
else if (TypeManager.IsEnumType (type)){
- EmitLoadOpcode (ig, TypeManager.EnumToUnderlying (type), rank);
+ EmitLoadOpcode (ig, TypeManager.GetEnumUnderlyingType (type), rank);
} else if (type.IsValueType){
ig.Emit (OpCodes.Ldelema, type);
ig.Emit (OpCodes.Ldobj, type);
ig.Emit (OpCodes.Ldelem_Ref);
}
+ protected override void Error_NegativeArrayIndex (Location loc)
+ {
+ Report.Warning (251, 2, loc, "Indexing an array with a negative index (array indices always start at zero)");
+ }
+
/// <summary>
/// Returns the right opcode to store an object of Type `t'
/// from an array of T.
has_type_arg = false; is_stobj = false;
t = TypeManager.TypeToCoreType (t);
if (TypeManager.IsEnumType (t))
- t = TypeManager.EnumToUnderlying (t);
+ t = TypeManager.GetEnumUnderlyingType (t);
if (t == TypeManager.byte_type || t == TypeManager.sbyte_type ||
t == TypeManager.bool_type)
return OpCodes.Stelem_I1;
// initialized), then load the arguments the first time and store them
// in locals. otherwise load from local variables.
//
- // prepareForLoad is used in compound assignments to cache original index
+ // prepare_for_load is used in compound assignments to cache original index
// values ( label[idx++] += s )
//
- LocalTemporary [] LoadArrayAndArguments (EmitContext ec, bool prepareForLoad)
+ LocalTemporary [] LoadArrayAndArguments (EmitContext ec, bool prepare_for_load)
{
ea.Expr.Emit (ec);
LocalTemporary[] indexes = null;
- if (prepareForLoad) {
+ if (prepare_for_load) {
ec.ig.Emit (OpCodes.Dup);
indexes = new LocalTemporary [ea.Arguments.Count];
}
for (int i = 0; i < ea.Arguments.Count; ++i) {
- ((Argument)ea.Arguments [i]).EmitArrayArgument (ec);
- if (!prepareForLoad)
+ ((Argument)ea.Arguments [i]).Emit (ec);
+ if (!prepare_for_load)
continue;
// Keep original array index value on the stack
}
}
}
-
- class Indexers {
- // note that the ArrayList itself in mutable. We just can't assign to 'Properties' again.
- public readonly ArrayList Properties;
- static Indexers empty;
-
- public struct Indexer {
- public readonly PropertyInfo PropertyInfo;
- public readonly MethodInfo Getter, Setter;
- public Indexer (PropertyInfo property_info, MethodInfo get, MethodInfo set)
+ /// <summary>
+ /// Expressions that represent an indexer call.
+ /// </summary>
+ public class IndexerAccess : Expression, IAssignMethod
+ {
+ class IndexerMethodGroupExpr : MethodGroupExpr
+ {
+ public IndexerMethodGroupExpr (Indexers indexers, Location loc)
+ : base (null, loc)
{
- this.PropertyInfo = property_info;
- this.Getter = get;
- this.Setter = set;
+ Methods = (MethodBase []) indexers.Methods.ToArray (typeof (MethodBase));
}
- }
-
- static Indexers ()
- {
- empty = new Indexers (null);
- }
- Indexers (ArrayList array)
- {
- Properties = array;
- }
+ public override string Name {
+ get {
+ return "this";
+ }
+ }
- static void Append (ref Indexers ix, Type caller_type, MemberInfo [] mi)
- {
- bool dummy;
- if (mi == null)
- return;
- foreach (PropertyInfo property in mi){
- MethodInfo get, set;
+ protected override int GetApplicableParametersCount (MethodBase method, ParameterData parameters)
+ {
+ //
+ // Here is the trick, decrease number of arguments by 1 when only
+ // available property method is setter. This makes overload resolution
+ // work correctly for indexers.
+ //
- get = property.GetGetMethod (true);
- set = property.GetSetMethod (true);
- if (get != null && !Expression.IsAccessorAccessible (caller_type, get, out dummy))
- get = null;
- if (set != null && !Expression.IsAccessorAccessible (caller_type, set, out dummy))
- set = null;
- if (get != null || set != null) {
- if (ix == empty)
- ix = new Indexers (new ArrayList ());
- ix.Properties.Add (new Indexer (property, get, set));
- }
+ if (method.Name [0] == 'g')
+ return parameters.Count;
+
+ return parameters.Count - 1;
}
}
- static private MemberInfo [] GetIndexersForTypeOrInterface (Type caller_type, Type lookup_type)
+ class Indexers
{
- string p_name = TypeManager.IndexerPropertyName (lookup_type);
+ // Contains either property getter or setter
+ public ArrayList Methods;
+ public ArrayList Properties;
- return TypeManager.MemberLookup (
- caller_type, caller_type, lookup_type, MemberTypes.Property,
- BindingFlags.Public | BindingFlags.Instance |
- BindingFlags.DeclaredOnly, p_name, null);
- }
-
- static public Indexers GetIndexersForType (Type caller_type, Type lookup_type)
- {
- Indexers ix = empty;
+ Indexers ()
+ {
+ }
-#if GMCS_SOURCE
- if (lookup_type.IsGenericParameter) {
- GenericConstraints gc = TypeManager.GetTypeParameterConstraints (lookup_type);
- if (gc == null)
- return empty;
+ void Append (Type caller_type, MemberInfo [] mi)
+ {
+ if (mi == null)
+ return;
- if (gc.HasClassConstraint)
- Append (ref ix, caller_type, GetIndexersForTypeOrInterface (caller_type, gc.ClassConstraint));
+ foreach (PropertyInfo property in mi) {
+ MethodInfo accessor = property.GetGetMethod (true);
+ if (accessor == null)
+ accessor = property.GetSetMethod (true);
- Type[] ifaces = gc.InterfaceConstraints;
- foreach (Type itype in ifaces)
- Append (ref ix, caller_type, GetIndexersForTypeOrInterface (caller_type, itype));
+ if (Methods == null) {
+ Methods = new ArrayList ();
+ Properties = new ArrayList ();
+ }
- return ix;
+ Methods.Add (accessor);
+ Properties.Add (property);
+ }
}
-#endif
- Type copy = lookup_type;
- while (copy != TypeManager.object_type && copy != null){
- Append (ref ix, caller_type, GetIndexersForTypeOrInterface (caller_type, copy));
- copy = copy.BaseType;
+ static MemberInfo [] GetIndexersForTypeOrInterface (Type caller_type, Type lookup_type)
+ {
+ string p_name = TypeManager.IndexerPropertyName (lookup_type);
+
+ return TypeManager.MemberLookup (
+ caller_type, caller_type, lookup_type, MemberTypes.Property,
+ BindingFlags.Public | BindingFlags.Instance |
+ BindingFlags.DeclaredOnly, p_name, null);
}
+
+ public static Indexers GetIndexersForType (Type caller_type, Type lookup_type)
+ {
+ Indexers ix = new Indexers ();
- if (lookup_type.IsInterface) {
- Type [] ifaces = TypeManager.GetInterfaces (lookup_type);
- if (ifaces != null) {
+ #if GMCS_SOURCE
+ if (lookup_type.IsGenericParameter) {
+ GenericConstraints gc = TypeManager.GetTypeParameterConstraints (lookup_type);
+ if (gc == null)
+ return ix;
+
+ if (gc.HasClassConstraint)
+ ix.Append (caller_type, GetIndexersForTypeOrInterface (caller_type, gc.ClassConstraint));
+
+ Type[] ifaces = gc.InterfaceConstraints;
foreach (Type itype in ifaces)
- Append (ref ix, caller_type, GetIndexersForTypeOrInterface (caller_type, itype));
+ ix.Append (caller_type, GetIndexersForTypeOrInterface (caller_type, itype));
+
+ return ix;
+ }
+ #endif
+
+ Type copy = lookup_type;
+ while (copy != TypeManager.object_type && copy != null){
+ ix.Append (caller_type, GetIndexersForTypeOrInterface (caller_type, copy));
+ copy = copy.BaseType;
+ }
+
+ if (lookup_type.IsInterface) {
+ Type [] ifaces = TypeManager.GetInterfaces (lookup_type);
+ if (ifaces != null) {
+ foreach (Type itype in ifaces)
+ ix.Append (caller_type, GetIndexersForTypeOrInterface (caller_type, itype));
+ }
}
+
+ return ix;
}
+ }
- return ix;
+ enum AccessorType
+ {
+ Get,
+ Set
}
- }
- /// <summary>
- /// Expressions that represent an indexer call.
- /// </summary>
- public class IndexerAccess : Expression, IAssignMethod {
//
// Points to our "data" repository
//
MethodInfo get, set;
- ArrayList set_arguments;
bool is_base_indexer;
bool prepared;
LocalTemporary temp;
LocalTemporary prepared_value;
+ Expression set_expr;
protected Type indexer_type;
protected Type current_type;
this.loc = loc;
}
+ static string GetAccessorName (AccessorType at)
+ {
+ if (at == AccessorType.Set)
+ return "set";
+
+ if (at == AccessorType.Get)
+ return "get";
+
+ throw new NotImplementedException (at.ToString ());
+ }
+
protected virtual bool CommonResolve (EmitContext ec)
{
indexer_type = instance_expr.Type;
public override Expression DoResolve (EmitContext ec)
{
- if (!CommonResolve (ec))
- return null;
-
- //
- // Step 1: Query for all `Item' *properties*. Notice
- // that the actual methods are pointed from here.
- //
- // This is a group of properties, piles of them.
-
- ArrayList AllGetters = null;
-
- Indexers ilist = Indexers.GetIndexersForType (current_type, indexer_type);
- if (ilist.Properties != null) {
- AllGetters = new ArrayList(ilist.Properties.Count);
- foreach (Indexers.Indexer ix in ilist.Properties) {
- if (ix.Getter != null)
- AllGetters.Add (ix.Getter);
- }
- }
-
- if (AllGetters == null) {
- Report.Error (21, loc, "Cannot apply indexing with [] to an expression of type `{0}'",
- TypeManager.CSharpName (indexer_type));
- return null;
- }
-
- if (AllGetters.Count == 0) {
- // FIXME: we cannot simply select first one as the error message is missleading when
- // multiple indexers exist
- Indexers.Indexer first_indexer = (Indexers.Indexer)ilist.Properties[ilist.Properties.Count - 1];
- Report.Error (154, loc, "The property or indexer `{0}' cannot be used in this context because it lacks the `get' accessor",
- TypeManager.GetFullNameSignature (first_indexer.PropertyInfo));
- return null;
- }
-
- get = (MethodInfo)new MethodGroupExpr (AllGetters, type, loc).OverloadResolve (ec,
- arguments, false, loc);
-
- if (get == null) {
- Invocation.Error_WrongNumArguments (loc, "this", arguments.Count);
- return null;
- }
-
- //
- // Only base will allow this invocation to happen.
- //
- if (get.IsAbstract && this is BaseIndexerAccess){
- Error_CannotCallAbstractBase (TypeManager.CSharpSignature (get));
- return null;
- }
-
- type = get.ReturnType;
- if (type.IsPointer && !ec.InUnsafe){
- UnsafeError (loc);
- return null;
- }
-
- instance_expr.CheckMarshalByRefAccess ();
-
- eclass = ExprClass.IndexerAccess;
- return this;
+ return ResolveAccessor (ec, AccessorType.Get);
}
public override Expression DoResolveLValue (EmitContext ec, Expression right_side)
// if the indexer returns a value type, and we try to set a field in it
if (right_side == EmptyExpression.LValueMemberAccess || right_side == EmptyExpression.LValueMemberOutAccess) {
- Report.Error (1612, loc, "Cannot modify the return value of `{0}' because it is not a variable",
- GetSignatureForError ());
- return null;
+ Error_CannotModifyIntermediateExpressionValue (ec);
}
- ArrayList AllSetters = new ArrayList();
- if (!CommonResolve (ec))
+ Expression e = ResolveAccessor (ec, AccessorType.Set);
+ if (e == null)
return null;
- bool found_any = false, found_any_setters = false;
+ set_expr = Convert.ImplicitConversion (ec, right_side, type, loc);
+ return e;
+ }
- Indexers ilist = Indexers.GetIndexersForType (current_type, indexer_type);
- if (ilist.Properties != null) {
- found_any = true;
- foreach (Indexers.Indexer ix in ilist.Properties) {
- if (ix.Setter != null)
- AllSetters.Add (ix.Setter);
- }
- }
- if (AllSetters.Count > 0) {
- found_any_setters = true;
- set_arguments = (ArrayList) arguments.Clone ();
- set_arguments.Add (new Argument (right_side, Argument.AType.Expression));
- set = (MethodInfo)(new MethodGroupExpr (AllSetters, type, loc)).OverloadResolve (
- ec,
- set_arguments, false, loc);
- }
+ Expression ResolveAccessor (EmitContext ec, AccessorType accessorType)
+ {
+ if (!CommonResolve (ec))
+ return null;
- if (!found_any) {
+ Indexers ilist = Indexers.GetIndexersForType (current_type, indexer_type);
+ if (ilist.Methods == null) {
Report.Error (21, loc, "Cannot apply indexing with [] to an expression of type `{0}'",
- TypeManager.CSharpName (indexer_type));
+ TypeManager.CSharpName (indexer_type));
return null;
}
- if (!found_any_setters) {
- Error (154, "indexer can not be used in this context, because " +
- "it lacks a `set' accessor");
+ MethodGroupExpr mg = new IndexerMethodGroupExpr (ilist, loc);
+ mg = mg.OverloadResolve (ec, ref arguments, false, loc);
+ if (mg == null)
return null;
+
+ MethodInfo mi = (MethodInfo) mg;
+ PropertyInfo pi = null;
+ for (int i = 0; i < ilist.Methods.Count; ++i) {
+ if (ilist.Methods [i] == mi) {
+ pi = (PropertyInfo) ilist.Properties [i];
+ break;
+ }
+ }
+
+ type = TypeManager.TypeToCoreType (pi.PropertyType);
+ if (type.IsPointer && !ec.InUnsafe)
+ UnsafeError (loc);
+
+ MethodInfo accessor;
+ if (accessorType == AccessorType.Get) {
+ accessor = get = pi.GetGetMethod (true);
+ } else {
+ accessor = set = pi.GetSetMethod (true);
+ if (accessor == null && pi.GetGetMethod (true) != null) {
+ Report.SymbolRelatedToPreviousError (pi);
+ Report.Error (200, loc, "The read only property or indexer `{0}' cannot be assigned to",
+ TypeManager.GetFullNameSignature (pi));
+ return null;
+ }
}
- if (set == null) {
- Invocation.Error_WrongNumArguments (loc, "this", arguments.Count);
+ if (accessor == null) {
+ Report.SymbolRelatedToPreviousError (pi);
+ Report.Error (154, loc, "The property or indexer `{0}' cannot be used in this context because it lacks a `{1}' accessor",
+ TypeManager.GetFullNameSignature (pi), GetAccessorName (accessorType));
return null;
}
//
// Only base will allow this invocation to happen.
//
- if (set.IsAbstract && this is BaseIndexerAccess){
- Error_CannotCallAbstractBase (TypeManager.CSharpSignature (set));
- return null;
+ if (accessor.IsAbstract && this is BaseIndexerAccess) {
+ Error_CannotCallAbstractBase (TypeManager.GetFullNameSignature (pi));
}
- //
- // Now look for the actual match in the list of indexers to set our "return" type
- //
- type = TypeManager.void_type; // default value
- foreach (Indexers.Indexer ix in ilist.Properties){
- if (ix.Setter == set){
- type = ix.PropertyInfo.PropertyType;
- break;
+ bool must_do_cs1540_check;
+ if (!IsAccessorAccessible (ec.ContainerType, accessor, out must_do_cs1540_check)) {
+ if (set == null)
+ set = pi.GetSetMethod (true);
+ else
+ get = pi.GetGetMethod (true);
+
+ if (set != null && get != null &&
+ (set.Attributes & MethodAttributes.MemberAccessMask) != (get.Attributes & MethodAttributes.MemberAccessMask)) {
+ Report.SymbolRelatedToPreviousError (accessor);
+ Report.Error (271, loc, "The property or indexer `{0}' cannot be used in this context because a `{1}' accessor is inaccessible",
+ TypeManager.GetFullNameSignature (pi), GetAccessorName (accessorType));
+ } else {
+ Report.SymbolRelatedToPreviousError (pi);
+ ErrorIsInaccesible (loc, TypeManager.GetFullNameSignature (pi));
}
}
- instance_expr.CheckMarshalByRefAccess ();
-
+ instance_expr.CheckMarshalByRefAccess (ec);
eclass = ExprClass.IndexerAccess;
return this;
}
public void EmitAssign (EmitContext ec, Expression source, bool leave_copy, bool prepare_for_load)
{
prepared = prepare_for_load;
- Argument a = (Argument) set_arguments [set_arguments.Count - 1];
-
+ Expression value = set_expr;
+
if (prepared) {
Invocation.EmitCall (ec, is_base_indexer, instance_expr, get,
arguments, loc, true, false);
temp = new LocalTemporary (Type);
source.Emit (ec);
temp.Store (ec);
- a.Expr = temp;
+ value = temp;
}
- Invocation.EmitCall (ec, is_base_indexer, instance_expr, set, set_arguments, loc, false, prepared);
+ arguments.Add (new Argument (value, Argument.AType.Expression));
+ Invocation.EmitCall (ec, is_base_indexer, instance_expr, set, arguments, loc, false, prepared);
if (temp != null) {
temp.Emit (ec);
}
}
-
public override void Emit (EmitContext ec)
{
Emit (ec, false);
public override string GetSignatureForError ()
{
- // FIXME: print the argument list of the indexer
- return instance_expr.GetSignatureForError () + ".this[...]";
+ return TypeManager.CSharpSignature (get != null ? get : set, false);
}
protected override void CloneTo (CloneContext clonectx, Expression t)
left = ec.GetThis (loc);
MemberExpr me = (MemberExpr) member_lookup;
-
- Expression e = me.ResolveMemberAccess (ec, left, loc, null);
-
- if (e is PropertyExpr) {
- PropertyExpr pe = (PropertyExpr) e;
- pe.IsBase = true;
- } else if (e is EventExpr) {
- EventExpr ee = (EventExpr) e;
- ee.IsBase = true;
- }
-
- MethodGroupExpr mg = e as MethodGroupExpr;
- if (mg != null)
- mg.IsBase = true;
+ me = me.ResolveMemberAccess (ec, left, loc, null);
+ if (me == null)
+ return null;
+ me.IsBase = true;
if (args != null) {
- if (mg != null)
- return mg.ResolveGeneric (ec, args);
-
- Report.Error (307, loc, "`{0}' cannot be used with type arguments",
- Identifier);
- return null;
+ args.Resolve (ec);
+ me.SetTypeArguments (args);
}
- return e;
+ return me;
}
public override void Emit (EmitContext ec)
{
BaseAccess target = (BaseAccess) t;
- target.args = args.Clone ();
+ if (args != null)
+ target.args = args.Clone ();
}
}
}
public class UserCast : Expression {
- MethodBase method;
+ MethodInfo method;
Expression source;
public UserCast (MethodInfo method, Expression source, Location l)
{
this.method = method;
this.source = source;
- type = method.ReturnType;
+ type = TypeManager.TypeToCoreType (method.ReturnType);
eclass = ExprClass.Value;
loc = l;
}
return source;
}
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (source.CreateExpressionTree (ec)));
+ args.Add (new Argument (new TypeOf (new TypeExpression (type, loc), loc)));
+ args.Add (new Argument (new Cast (new TypeExpression (typeof (MethodInfo), loc),
+ new TypeOfMethod (method, loc))));
+ return CreateExpressionFactoryCall ("Convert", args);
+ }
public override Expression DoResolve (EmitContext ec)
{
public override void Emit (EmitContext ec)
{
- ILGenerator ig = ec.ig;
-
source.Emit (ec);
-
- if (method is MethodInfo)
- ig.Emit (OpCodes.Call, (MethodInfo) method);
- else
- ig.Emit (OpCodes.Call, (ConstructorInfo) method);
-
+ ec.ig.Emit (OpCodes.Call, method);
}
}
loc = l;
}
-#if GMCS_SOURCE
public Expression RemoveNullable ()
{
if (dim.EndsWith ("?")) {
dim = dim.Substring (0, dim.Length - 1);
- if (dim == "")
+ if (dim.Length == 0)
return left;
}
return this;
}
-#endif
protected override TypeExpr DoResolveAsTypeStep (IResolveContext ec)
{
}
}
+ //
+ // Encapsulates a conversion rules required for array indexes
+ //
+ public class ArrayIndexCast : Expression
+ {
+ Expression expr;
+
+ public ArrayIndexCast (Expression expr)
+ {
+ this.expr = expr;
+ this.loc = expr.Location;
+ }
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (expr.CreateExpressionTree (ec)));
+ args.Add (new Argument (new TypeOf (new TypeExpression (TypeManager.int32_type, loc), loc)));
+ return CreateExpressionFactoryCall ("ConvertChecked", args);
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ type = expr.Type;
+ eclass = expr.eclass;
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ expr.Emit (ec);
+
+ if (type == TypeManager.int32_type)
+ return;
+
+ if (type == TypeManager.uint32_type)
+ ec.ig.Emit (OpCodes.Conv_U);
+ else if (type == TypeManager.int64_type)
+ ec.ig.Emit (OpCodes.Conv_Ovf_I);
+ else if (type == TypeManager.uint64_type)
+ ec.ig.Emit (OpCodes.Conv_Ovf_I_Un);
+ else
+ throw new InternalErrorException ("Cannot emit cast to unknown array element type", type);
+ }
+ }
+
//
// Used by the fixed statement
//
public override void Emit (EmitContext ec)
{
+ if (TypeManager.int_get_offset_to_string_data == null) {
+ // TODO: Move to resolve !!
+ TypeManager.int_get_offset_to_string_data = TypeManager.GetPredefinedMethod (
+ TypeManager.runtime_helpers_type, "get_OffsetToStringData", loc, Type.EmptyTypes);
+ }
+
ILGenerator ig = ec.ig;
ig.Emit (OpCodes.Ldloc, b);
return initializer;
}
- return new Assign (element_member, initializer, loc).Resolve (ec);
+ Assign a = new Assign (element_member, initializer, loc);
+ if (a.Resolve (ec) == null)
+ return null;
+
+ //
+ // Ignore field initializers with default value
+ //
+ Constant c = a.Source as Constant;
+ if (c != null && c.IsDefaultInitializer (a.Type) && a.Target.eclass == ExprClass.Variable)
+ return EmptyExpressionStatement.Instance;
+
+ return a;
}
protected override Expression Error_MemberLookupFailed (MemberInfo[] members)
}
}
- initializers [i] = initializer.Resolve (ec);
+ Expression e = initializer.Resolve (ec);
+ if (e == EmptyExpressionStatement.Instance)
+ initializers.RemoveAt (i--);
+ else
+ initializers [i] = e;
}
type = typeof (CollectionOrObjectInitializers);
//
public class NewInitialize : New
{
+ //
+ // This class serves as a proxy for variable initializer target instances.
+ // A real variable is assigned later when we resolve left side of an
+ // assignment
+ //
+ sealed class InitializerTargetExpression : Expression, IMemoryLocation
+ {
+ NewInitialize new_instance;
+
+ public InitializerTargetExpression (NewInitialize newInstance)
+ {
+ this.type = newInstance.type;
+ this.loc = newInstance.loc;
+ this.eclass = newInstance.eclass;
+ this.new_instance = newInstance;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ return this;
+ }
+
+ public override Expression DoResolveLValue (EmitContext ec, Expression right_side)
+ {
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ new_instance.value_target.Emit (ec);
+ }
+
+ #region IMemoryLocation Members
+
+ public void AddressOf (EmitContext ec, AddressOp mode)
+ {
+ ((IMemoryLocation)new_instance.value_target).AddressOf (ec, mode);
+ }
+
+ #endregion
+ }
+
CollectionOrObjectInitializers initializers;
- TemporaryVariable type_instance;
public NewInitialize (Expression requested_type, ArrayList arguments, CollectionOrObjectInitializers initializers, Location l)
: base (requested_type, arguments, l)
base.CloneTo (clonectx, t);
NewInitialize target = (NewInitialize) t;
- target.initializers = (CollectionOrObjectInitializers)initializers.Clone (clonectx);
+ target.initializers = (CollectionOrObjectInitializers) initializers.Clone (clonectx);
}
public override Expression DoResolve (EmitContext ec)
{
+ if (eclass != ExprClass.Invalid)
+ return this;
+
Expression e = base.DoResolve (ec);
if (type == null)
return null;
if (initializers.IsEmpty)
return e;
- type_instance = new TemporaryVariable (type, loc);
- type_instance = (TemporaryVariable)type_instance.Resolve (ec);
-
Expression previous = ec.CurrentInitializerVariable;
- ec.CurrentInitializerVariable = type_instance;
+ ec.CurrentInitializerVariable = new InitializerTargetExpression (this);
initializers.Resolve (ec);
ec.CurrentInitializerVariable = previous;
return this;
{
base.Emit (ec);
- type_instance.EmitStore (ec);
+ //
+ // If target is a value, let's use it
+ //
+ VariableReference variable = value_target as VariableReference;
+ if (variable != null) {
+ if (variable.IsRef)
+ StoreFromPtr (ec.ig, type);
+ else
+ variable.Variable.EmitAssign (ec);
+ } else {
+ if (value_target == null || value_target_set)
+ value_target = new LocalTemporary (type);
+
+ ((LocalTemporary) value_target).Store (ec);
+ }
+
initializers.Emit (ec);
- type_instance.Emit (ec);
+
+ if (variable == null)
+ value_target.Emit (ec);
+ }
+
+ public override void EmitStatement (EmitContext ec)
+ {
+ if (initializers.IsEmpty) {
+ base.EmitStatement (ec);
+ return;
+ }
+
+ base.Emit (ec);
+
+ if (value_target == null) {
+ LocalTemporary variable = new LocalTemporary (type);
+ variable.Store (ec);
+ value_target = variable;
+ }
+
+ initializers.EmitStatement (ec);
+ }
+
+ public override bool HasInitializer {
+ get {
+ return !initializers.IsEmpty;
+ }
}
}
type = e.Type;
if (type == TypeManager.void_type || type == TypeManager.null_type ||
type == TypeManager.anonymous_method_type || type.IsPointer) {
- Report.Error (828, loc, "An anonymous type property `{0}' cannot be initialized with `{1}'",
- Name, e.GetSignatureForError ());
+ Error_InvalidInitializer (e);
return null;
}
return e;
}
+ protected virtual void Error_InvalidInitializer (Expression initializer)
+ {
+ Report.Error (828, loc, "An anonymous type property `{0}' cannot be initialized with `{1}'",
+ Name, initializer.GetSignatureForError ());
+ }
+
public override void Emit (EmitContext ec)
{
throw new InternalErrorException ("Should not be reached");
projects / mono.git / blobdiff