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)
+ protected readonly ArrayList arguments;
+ protected 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,
- Indirection, AddressOf, TOP
+ AddressOf, TOP
}
+ public static readonly string [] oper_names;
+ static Type [] [] predefined_operators;
+
public readonly Operator Oper;
public Expression Expr;
this.loc = loc;
}
- /// <summary>
- /// Returns a stringified representation of the Operator
- /// </summary>
- static public string OperName (Operator oper)
- {
- switch (oper){
- case Operator.UnaryPlus:
- return "+";
- case Operator.UnaryNegation:
- return "-";
- case Operator.LogicalNot:
- return "!";
- case Operator.OnesComplement:
- return "~";
- case Operator.AddressOf:
- return "&";
- case Operator.Indirection:
- return "*";
- }
-
- return oper.ToString ();
- }
-
- public static readonly string [] oper_names;
-
static Unary ()
{
oper_names = new string [(int)Operator.TOP];
oper_names [(int) Operator.UnaryNegation] = "op_UnaryNegation";
oper_names [(int) Operator.LogicalNot] = "op_LogicalNot";
oper_names [(int) Operator.OnesComplement] = "op_OnesComplement";
- oper_names [(int) Operator.Indirection] = "op_Indirection";
oper_names [(int) Operator.AddressOf] = "op_AddressOf";
}
- public static void Error_OperatorCannotBeApplied (Location loc, string oper, Type t)
- {
- Error_OperatorCannotBeApplied (loc, oper, TypeManager.CSharpName (t));
- }
-
- public static void Error_OperatorCannotBeApplied (Location loc, string oper, string type)
- {
- Report.Error (23, loc, "The `{0}' operator cannot be applied to operand of type `{1}'",
- oper, type);
- }
-
- void Error23 (Type t)
- {
- Error_OperatorCannotBeApplied (loc, OperName (Oper), t);
- }
-
// <summary>
// This routine will attempt to simplify the unary expression when the
// argument is a constant.
return e;
}
return null;
-
- case Operator.AddressOf:
- return e;
-
- case Operator.Indirection:
- return e;
}
throw new Exception ("Can not constant fold: " + Oper.ToString());
}
- Expression ResolveOperator (EmitContext ec)
+ Expression ResolveOperator (EmitContext ec, Expression expr)
{
- //
- // Step 1: Default operations on CLI native types.
- //
+ if (predefined_operators == null)
+ CreatePredefinedOperatorsTable ();
- // Attempt to use a constant folding operation.
- Constant cexpr = Expr as Constant;
- if (cexpr != null) {
- cexpr = TryReduceConstant (ec, cexpr);
- if (cexpr != null) {
- return cexpr;
- }
- }
+ Type expr_type = expr.Type;
+ Expression best_expr;
//
- // Step 2: Perform Operator Overload location
+ // Primitive types first
//
- 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);
-
- if (e == null){
- Error23 (expr_type);
+ if (TypeManager.IsPrimitiveType (expr_type)) {
+ best_expr = ResolvePrimitivePredefinedType (expr);
+ if (best_expr == null)
return null;
- }
-
- return e;
- }
- switch (Oper){
- case Operator.LogicalNot:
- if (expr_type != TypeManager.bool_type) {
- Expr = ResolveBoolean (ec, Expr, loc);
- if (Expr == null){
- Error23 (expr_type);
- return null;
- }
- }
-
- type = TypeManager.bool_type;
+ type = best_expr.Type;
+ Expr = best_expr;
return this;
+ }
- case Operator.OnesComplement:
- // Unary numeric promotions
- if (expr_type == TypeManager.byte_type || expr_type == TypeManager.sbyte_type ||
- expr_type == TypeManager.short_type || expr_type == TypeManager.ushort_type ||
- expr_type == TypeManager.char_type)
- {
- type = TypeManager.int32_type;
- return EmptyCast.Create (this, type);
- }
-
- // Predefined operators
- if (expr_type == TypeManager.int32_type || expr_type == TypeManager.uint32_type ||
- expr_type == TypeManager.int64_type || expr_type == TypeManager.uint64_type ||
- TypeManager.IsEnumType (expr_type))
- {
- type = expr_type;
- return this;
- }
-
- type = TypeManager.int32_type;
- Expr = Convert.ImplicitUserConversion(ec, Expr, type, loc);
- if (Expr != null)
- return this;
-
- Error23 (expr_type);
- return null;
-
- case Operator.AddressOf:
- if (!ec.InUnsafe) {
- UnsafeError (loc);
- return null;
- }
-
- if (!TypeManager.VerifyUnManaged (Expr.Type, loc)){
- return null;
- }
-
- IVariable variable = Expr as IVariable;
- bool is_fixed = variable != null && variable.VerifyFixed ();
-
- if (!ec.InFixedInitializer && !is_fixed) {
- Error (212, "You can only take the address of unfixed expression inside " +
- "of a fixed statement initializer");
- return null;
- }
-
- if (ec.InFixedInitializer && is_fixed) {
- Error (213, "You cannot use the fixed statement to take the address of an already fixed expression");
- return null;
- }
-
- LocalVariableReference lr = Expr as LocalVariableReference;
- if (lr != null){
- if (lr.local_info.IsCaptured){
- AnonymousMethod.Error_AddressOfCapturedVar (lr.Name, loc);
- return null;
- }
- lr.local_info.AddressTaken = true;
- lr.local_info.Used = true;
- }
-
- ParameterReference pr = Expr as ParameterReference;
- if ((pr != null) && pr.Parameter.IsCaptured) {
- AnonymousMethod.Error_AddressOfCapturedVar (pr.Name, loc);
+ //
+ // E operator ~(E x);
+ //
+ if (Oper == Operator.OnesComplement && TypeManager.IsEnumType (expr_type)) {
+ best_expr = ResolvePrimitivePredefinedType (EmptyCast.Create (expr, TypeManager.GetEnumUnderlyingType (expr_type)));
+ if (best_expr == null)
return null;
- }
-
- // According to the specs, a variable is considered definitely assigned if you take
- // its address.
- if ((variable != null) && (variable.VariableInfo != null)){
- variable.VariableInfo.SetAssigned (ec);
- }
- type = TypeManager.GetPointerType (Expr.Type);
+ Expr = EmptyCast.Create (best_expr, expr_type);
+ type = Expr.Type;
return this;
+ }
- case Operator.Indirection:
- if (!ec.InUnsafe){
- UnsafeError (loc);
- return null;
- }
-
- if (!expr_type.IsPointer){
- Error (193, "The * or -> operator must be applied to a pointer");
- return null;
- }
-
- //
- // We create an Indirection expression, because
- // it can implement the IMemoryLocation.
- //
- return new Indirection (Expr, loc);
-
- case Operator.UnaryPlus:
- // Unary numeric promotions
- if (expr_type == TypeManager.byte_type || expr_type == TypeManager.sbyte_type ||
- expr_type == TypeManager.short_type || expr_type == TypeManager.ushort_type ||
- expr_type == TypeManager.char_type)
- {
- return EmptyCast.Create (Expr, TypeManager.int32_type);
- }
+ return ResolveUserType (ec, expr);
+ }
- // Predefined operators
- if (expr_type == TypeManager.int32_type || expr_type == TypeManager.uint32_type ||
- expr_type == TypeManager.int64_type || expr_type == TypeManager.uint64_type ||
- expr_type == TypeManager.float_type || expr_type == TypeManager.double_type ||
- expr_type == TypeManager.decimal_type)
- {
- return Expr;
- }
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ return CreateExpressionTree (ec, null);
+ }
- Expr = Convert.ImplicitUserConversion(ec, Expr, TypeManager.int32_type, loc);
- if (Expr != null) {
- // Because we can completely ignore unary +
- return Expr;
- }
+ 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 ());
+ }
- Error23 (expr_type);
- return null;
+ 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);
+ }
- case Operator.UnaryNegation:
- //
- // transform - - expr into expr
- //
- Unary u = Expr as Unary;
- if (u != null && u.Oper == Operator.UnaryNegation) {
- return u.Expr;
- }
+ static void CreatePredefinedOperatorsTable ()
+ {
+ predefined_operators = new Type [(int) Operator.TOP] [];
- // Unary numeric promotions
- if (expr_type == TypeManager.byte_type || expr_type == TypeManager.sbyte_type ||
- expr_type == TypeManager.short_type || expr_type == TypeManager.ushort_type ||
- expr_type == TypeManager.char_type)
- {
- type = TypeManager.int32_type;
- return EmptyCast.Create (this, type);
- }
+ //
+ // 7.6.1 Unary plus operator
+ //
+ predefined_operators [(int) Operator.UnaryPlus] = new Type [] {
+ TypeManager.int32_type, TypeManager.uint32_type,
+ TypeManager.int64_type, TypeManager.uint64_type,
+ TypeManager.float_type, TypeManager.double_type,
+ TypeManager.decimal_type
+ };
- //
- // Predefined operators
- //
- if (expr_type == TypeManager.uint32_type) {
- type = TypeManager.int64_type;
- Expr = Convert.ImplicitNumericConversion (Expr, type);
- return this;
- }
+ //
+ // 7.6.2 Unary minus operator
+ //
+ predefined_operators [(int) Operator.UnaryNegation] = new Type [] {
+ TypeManager.int32_type,
+ TypeManager.int64_type,
+ TypeManager.float_type, TypeManager.double_type,
+ TypeManager.decimal_type
+ };
- if (expr_type == TypeManager.int32_type || expr_type == TypeManager.int64_type ||
- expr_type == TypeManager.float_type || expr_type == TypeManager.double_type ||
- expr_type == TypeManager.decimal_type)
- {
- type = expr_type;
- return this;
- }
+ //
+ // 7.6.3 Logical negation operator
+ //
+ predefined_operators [(int) Operator.LogicalNot] = new Type [] {
+ TypeManager.bool_type
+ };
- //
- // User conversion
+ //
+ // 7.6.4 Bitwise complement operator
+ //
+ predefined_operators [(int) Operator.OnesComplement] = new Type [] {
+ TypeManager.int32_type, TypeManager.uint32_type,
+ TypeManager.int64_type, TypeManager.uint64_type
+ };
+ }
- type = TypeManager.int32_type;
- Expr = Convert.ImplicitUserConversion(ec, Expr, type, loc);
- if (Expr != null)
- return this;
+ //
+ // Unary numeric promotions
+ //
+ static Expression DoNumericPromotion (Operator op, Expression expr)
+ {
+ Type expr_type = expr.Type;
+ if ((op == Operator.UnaryPlus || op == Operator.UnaryNegation || op == Operator.OnesComplement) &&
+ expr_type == TypeManager.byte_type || expr_type == TypeManager.sbyte_type ||
+ expr_type == TypeManager.short_type || expr_type == TypeManager.ushort_type ||
+ expr_type == TypeManager.char_type)
+ return Convert.ImplicitNumericConversion (expr, TypeManager.int32_type);
- Error23 (expr_type);
- return null;
- }
+ if (op == Operator.UnaryNegation && expr_type == TypeManager.uint32_type)
+ return Convert.ImplicitNumericConversion (expr, TypeManager.int64_type);
- Error (187, "No such operator '" + OperName (Oper) + "' defined for type '" +
- TypeManager.CSharpName (expr_type) + "'");
- return null;
+ return expr;
}
public override Expression DoResolve (EmitContext ec)
{
+ eclass = ExprClass.Value;
+
if (Oper == Operator.AddressOf) {
Expr = Expr.DoResolveLValue (ec, new EmptyExpression ());
Error (211, "Cannot take the address of the given expression");
return null;
}
+
+ return ResolveAddressOf (ec);
}
- else
- Expr = Expr.Resolve (ec);
+ Expr = Expr.Resolve (ec);
if (Expr == null)
return null;
return new Nullable.LiftedUnaryOperator (Oper, Expr, loc).Resolve (ec);
#endif
- eclass = ExprClass.Value;
- return ResolveOperator (ec);
+ //
+ // Attempt to use a constant folding operation.
+ //
+ Constant cexpr = Expr as Constant;
+ if (cexpr != null) {
+ cexpr = TryReduceConstant (ec, cexpr);
+ if (cexpr != null)
+ return cexpr;
+ }
+
+ Expression expr = ResolveOperator (ec, Expr);
+ if (expr == null)
+ Error_OperatorCannotBeApplied (loc, OperName (Oper), Expr.Type);
+
+ //
+ // Reduce unary operator on predefined types
+ //
+ if (expr == this && Oper == Operator.UnaryPlus)
+ return Expr;
+
+ return expr;
}
public override Expression DoResolveLValue (EmitContext ec, Expression right)
{
- if (Oper == Operator.Indirection)
- return DoResolve (ec);
-
return null;
}
public override void Emit (EmitContext ec)
{
ILGenerator ig = ec.ig;
-
+
switch (Oper) {
case Operator.UnaryPlus:
throw new Exception ("This should be caught by Resolve");
base.EmitBranchable (ec, target, on_true);
}
- public override string ToString ()
+ public static void Error_OperatorCannotBeApplied (Location loc, string oper, Type t)
{
- return "Unary (" + Oper + ", " + Expr + ")";
+ Report.Error (23, loc, "The `{0}' operator cannot be applied to operand of type `{1}'",
+ oper, TypeManager.CSharpName (t));
}
- protected override void CloneTo (CloneContext clonectx, Expression t)
+ //
+ // Returns a stringified representation of the Operator
+ //
+ public static string OperName (Operator oper)
{
- Unary target = (Unary) t;
+ switch (oper) {
+ case Operator.UnaryPlus:
+ return "+";
+ case Operator.UnaryNegation:
+ return "-";
+ case Operator.LogicalNot:
+ return "!";
+ case Operator.OnesComplement:
+ return "~";
+ case Operator.AddressOf:
+ return "&";
+ }
- target.Expr = Expr.Clone (clonectx);
+ throw new NotImplementedException (oper.ToString ());
}
- }
- //
- // Unary operators are turned into Indirection expressions
- // after semantic analysis (this is so we can take the address
- // of an indirection).
- //
- public class Indirection : Expression, IMemoryLocation, IAssignMethod, IVariable {
- Expression expr;
- LocalTemporary temporary;
- bool prepared;
-
- public Indirection (Expression expr, Location l)
+ Expression ResolveAddressOf (EmitContext ec)
+ {
+ if (!ec.InUnsafe) {
+ UnsafeError (loc);
+ return null;
+ }
+
+ if (!TypeManager.VerifyUnManaged (Expr.Type, loc)) {
+ return null;
+ }
+
+ IVariable variable = Expr as IVariable;
+ bool is_fixed = variable != null && variable.VerifyFixed ();
+
+ if (!ec.InFixedInitializer && !is_fixed) {
+ Error (212, "You can only take the address of unfixed expression inside " +
+ "of a fixed statement initializer");
+ return null;
+ }
+
+ if (ec.InFixedInitializer && is_fixed) {
+ Error (213, "You cannot use the fixed statement to take the address of an already fixed expression");
+ return null;
+ }
+
+ LocalVariableReference lr = Expr as LocalVariableReference;
+ if (lr != null) {
+ if (lr.local_info.IsCaptured) {
+ AnonymousMethod.Error_AddressOfCapturedVar (lr.Name, loc);
+ return null;
+ }
+ lr.local_info.AddressTaken = true;
+ lr.local_info.Used = true;
+ }
+
+ ParameterReference pr = Expr as ParameterReference;
+ if ((pr != null) && pr.Parameter.IsCaptured) {
+ AnonymousMethod.Error_AddressOfCapturedVar (pr.Name, loc);
+ return null;
+ }
+
+ // According to the specs, a variable is considered definitely assigned if you take
+ // its address.
+ if ((variable != null) && (variable.VariableInfo != null)) {
+ variable.VariableInfo.SetAssigned (ec);
+ }
+
+ type = TypeManager.GetPointerType (Expr.Type);
+ return this;
+ }
+
+ Expression ResolvePrimitivePredefinedType (Expression expr)
+ {
+ expr = DoNumericPromotion (Oper, expr);
+ Type expr_type = expr.Type;
+ Type[] predefined = predefined_operators [(int) Oper];
+ foreach (Type t in predefined) {
+ if (t == expr_type)
+ return expr;
+ }
+ return null;
+ }
+
+ //
+ // Unary user type overload resolution
+ //
+ Expression ResolveUserType (EmitContext ec, Expression expr)
+ {
+ //
+ // Perform user-operator overload resolution
+ //
+ string op_name = oper_names [(int) Oper];
+ MethodGroupExpr user_op = MemberLookup (ec.ContainerType, expr.Type, op_name, MemberTypes.Method, AllBindingFlags, expr.Location) 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, expr.Location);
+
+ if (user_op != null) {
+ Expr = ((Argument) args [0]).Expr;
+ return new UserOperatorCall (user_op, args, CreateExpressionTree, expr.Location);
+ }
+ }
+
+ Type[] predefined = predefined_operators [(int) Oper];
+ Expression best_expr = null;
+ foreach (Type t in predefined) {
+ Expression oper_expr = Convert.UserDefinedConversion (ec, expr, t, expr.Location, false);
+ if (oper_expr == null)
+ continue;
+
+ //
+ // decimal type is predefined but has user-operators
+ //
+ if (oper_expr.Type == TypeManager.decimal_type)
+ oper_expr = ResolveUserType (ec, oper_expr);
+ else
+ oper_expr = ResolvePrimitivePredefinedType (oper_expr);
+
+ if (oper_expr == null)
+ continue;
+
+ if (best_expr == null) {
+ best_expr = oper_expr;
+ continue;
+ }
+
+ int result = MethodGroupExpr.BetterTypeConversion (ec, best_expr.Type, t);
+ if (result == 0) {
+ Report.Error (35, loc, "Operator `{0}' is ambiguous on an operand of type `{1}'",
+ OperName (Oper), TypeManager.CSharpName (expr.Type));
+ break;
+ }
+
+ if (result == 2)
+ best_expr = oper_expr;
+ }
+
+ if (best_expr == null)
+ return null;
+
+ //
+ // HACK: Decimal user-operator is included in standard operators
+ //
+ if (best_expr.Type == TypeManager.decimal_type)
+ return best_expr;
+
+ Expr = best_expr;
+ type = best_expr.Type;
+ return this;
+ }
+
+ protected override void CloneTo (CloneContext clonectx, Expression t)
+ {
+ Unary target = (Unary) t;
+
+ target.Expr = Expr.Clone (clonectx);
+ }
+ }
+
+ //
+ // Unary operators are turned into Indirection expressions
+ // after semantic analysis (this is so we can take the address
+ // of an indirection).
+ //
+ public class Indirection : Expression, IMemoryLocation, IAssignMethod, IVariable {
+ Expression expr;
+ LocalTemporary temporary;
+ bool prepared;
+
+ public Indirection (Expression expr, Location l)
{
this.expr = expr;
- type = TypeManager.HasElementType (expr.Type) ? TypeManager.GetElementType (expr.Type) : expr.Type;
- eclass = ExprClass.Variable;
loc = l;
}
public override Expression DoResolve (EmitContext ec)
{
- //
- // Born fully resolved
- //
+ expr = expr.Resolve (ec);
+ if (expr == null)
+ return null;
+
+ if (!ec.InUnsafe)
+ UnsafeError (loc);
+
+ if (!expr.Type.IsPointer) {
+ Error (193, "The * or -> operator must be applied to a pointer");
+ return null;
+ }
+
+ type = TypeManager.GetElementType (expr.Type);
+ eclass = ExprClass.Variable;
return this;
}
//
// 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;
return this;
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ return new Assign (this, this).CreateExpressionTree (ec);
+ }
+
public override Expression DoResolve (EmitContext ec)
{
expr = expr.Resolve (ec);
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;
}
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));
+ return Nullable.LiftedNull.CreateFromExpression (this);
}
Expression e = Convert.ImplicitConversion (ec, expr, type, loc);
this.loc = loc;
}
+ 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)
{
TypeExpr texpr = expr.ResolveAsTypeTerminal (ec, false);
return null;
}
- if (TypeManager.IsGenericParameter (type))
- {
+ if (TypeManager.IsGenericParameter (type)) {
GenericConstraints constraints = TypeManager.GetTypeParameterConstraints(type);
if (constraints != null && constraints.IsReferenceType)
- return new NullDefault (new NullLiteral (Location), type);
- }
- else
- {
- Constant c = New.Constantify(type);
+ return new EmptyConstantCast (new NullLiteral (Location), type);
+ } else {
+ Constant c = New.Constantify (type);
if (c != null)
- return new NullDefault (c, type);
+ return new EmptyConstantCast (c, type);
if (!TypeManager.IsValueType (type))
- return new NullDefault (new NullLiteral (Location), type);
+ return new EmptyConstantCast (new NullLiteral (Location), type);
}
eclass = ExprClass.Variable;
return this;
/// 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
+
+ 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)
+ {
+ }
+
+ public PredefinedOperator (Type type, Operator op_mask, Type return_type)
+ : this (type, type, op_mask, return_type)
+ {
+ }
+
+ public PredefinedOperator (Type type, Operator op_mask)
+ : this (type, type, op_mask, type)
+ {
+ }
+
+ 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)
+ {
+ 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;
+ }
+ }
+
+ 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);
+ }
+ }
+
+ 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;
+ }
+ }
+
+ 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)
+ {
+ 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);
+ }
+ }
+
+ [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
}
readonly Operator oper;
// 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 [(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";
+ 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";
}
public Binary (Operator oper, Expression left, Expression right, bool isCompound)
return s;
}
- public override string ToString ()
+ static public void Error_OperatorCannotBeApplied (Location loc, string name, Type l, Type r)
+ {
+ Error_OperatorCannotBeApplied (loc, name, TypeManager.CSharpName (l), TypeManager.CSharpName (r));
+ }
+
+ public static void Error_OperatorCannotBeApplied (Location loc, string name, string left, string right)
{
- return "operator " + OperName (oper) + "(" + left.ToString () + ", " +
- right.ToString () + ")";
+ Report.Error (19, loc, "Operator `{0}' cannot be applied to operands of type `{1}' and `{2}'",
+ name, left, right);
}
- Expression ForceConversion (EmitContext ec, Expression expr, Type target_type)
+ protected void Error_OperatorCannotBeApplied (Expression left, Expression right)
{
- if (expr.Type == target_type)
- return expr;
+ 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);
- return Convert.ImplicitConversion (ec, expr, target_type, loc);
- }
+ if (right.eclass == ExprClass.MethodGroup)
+ r = right.ExprClassName;
+ else
+ r = TypeManager.CSharpName (right.Type);
- 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)
- + "'");
+ Error_OperatorCannotBeApplied (Location, OperName (oper), l, r);
}
- bool IsConvertible (EmitContext ec, Expression le, Expression re, Type t)
+ public static string GetOperatorMetadataName (Operator op)
{
- return Convert.ImplicitConversionExists (ec, le, t) && Convert.ImplicitConversionExists (ec, re, t);
+ return oper_names [(int)(op & Operator.ValuesOnlyMask)];
}
- bool VerifyApplicable_Predefined (EmitContext ec, Type t)
+ static bool IsUnsigned (Type t)
{
- if (!IsConvertible (ec, left, right, t))
- return false;
- left = ForceConversion (ec, left, t);
- right = ForceConversion (ec, right, t);
- type = t;
- return true;
+ while (t.IsPointer)
+ t = TypeManager.GetElementType (t);
+
+ return (t == TypeManager.uint32_type || t == TypeManager.uint64_type ||
+ t == TypeManager.ushort_type || t == TypeManager.byte_type);
}
- bool IsApplicable_String (EmitContext ec, Expression le, Expression re, Operator oper)
+ static bool IsFloat (Type t)
{
- bool l = Convert.ImplicitConversionExists (ec, le, TypeManager.string_type);
- bool r = Convert.ImplicitConversionExists (ec, re, TypeManager.string_type);
-
- if (oper == Operator.Equality || oper == Operator.Inequality)
- return l && r;
- if (oper == Operator.Addition)
- return l || r;
- return false;
+ return t == TypeManager.float_type || t == TypeManager.double_type;
}
- bool OverloadResolve_PredefinedString (EmitContext ec, Operator oper)
+ Expression ResolveOperator (EmitContext ec)
{
- if (!IsApplicable_String (ec, left, right, oper))
- return false;
-
Type l = left.Type;
Type r = right.Type;
- if (OverloadResolve_PredefinedIntegral (ec) ||
- OverloadResolve_PredefinedFloating (ec)) {
- Error_OperatorAmbiguous (loc, oper, l, r);
- }
-
- 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;
- }
+ Expression expr;
+ bool primitives_only = false;
- bool OverloadResolve_PredefinedIntegral (EmitContext ec)
- {
- 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;
- }
+ //
+ // 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;
- bool OverloadResolve_PredefinedFloating (EmitContext ec)
- {
- return VerifyApplicable_Predefined (ec, TypeManager.float_type) ||
- VerifyApplicable_Predefined (ec, TypeManager.double_type) ||
- false;
- }
+ primitives_only = true;
+ }
+ } else {
+ // Pointers
+ if (l.IsPointer || r.IsPointer)
+ return ResolveOperatorPointer (ec, l, r);
- static public void Error_OperatorCannotBeApplied (Location loc, string name, Type l, Type r)
- {
- Error_OperatorCannotBeApplied (loc, name, TypeManager.CSharpName (l), TypeManager.CSharpName (r));
- }
+ // Enums
+ bool lenum = TypeManager.IsEnumType (l);
+ bool renum = TypeManager.IsEnumType (r);
+ if (lenum || renum) {
+ expr = ResolveOperatorEnum (ec, lenum, renum, l, r);
- public static void Error_OperatorCannotBeApplied (Location loc, string name, string left, string right)
- {
- Report.Error (19, loc, "Operator `{0}' cannot be applied to operands of type `{1}' and `{2}'",
- name, left, right);
- }
-
- protected void Error_OperatorCannotBeApplied ()
- {
- Error_OperatorCannotBeApplied (Location, OperName (oper), TypeManager.CSharpName (left.Type),
- TypeManager.CSharpName(right.Type));
- }
+ // TODO: Can this be ambiguous
+ if (expr != null)
+ return expr;
+ }
- static bool IsUnsigned (Type t)
- {
- if (t.IsPointer)
- return IsUnsigned (t.GetElementType ());
-
- return (t == TypeManager.uint32_type || t == TypeManager.uint64_type ||
- t == TypeManager.short_type || t == TypeManager.byte_type);
- }
+ // Delegates
+ if (oper == Operator.Addition || oper == Operator.Subtraction) {
+ if (TypeManager.IsDelegateType (l))
+ return ResolveOperatorDelegateBinary (ec, l, r);
+ }
- 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;
+ // User operators
+ expr = ResolveUserOperator (ec, l, r);
+ if (expr != null)
+ return expr;
+
+ // Predefined reference types equality
+ if ((oper & Operator.EqualityMask) != 0) {
+ expr = ResolveOperatorEqualityRerefence (ec, l, r);
+ if (expr != null)
+ return expr;
+ }
+ }
+
+ if (standard_operators == null)
+ CreateStandardOperatorsTable ();
+
+ return ResolveOperatorPredefined (ec, standard_operators, primitives_only);
}
-
- Expression CheckShiftArguments (EmitContext ec)
+
+ Constant EnumLiftUp (Constant left, Constant right)
{
- 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;
+ 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;
}
- 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 (this.left, this.right);
+ return null;
}
//
- // This is used to check if a test 'x == null' can be optimized to a reference equals,
- // i.e., not invoke op_Equality.
+ // The `|' operator used on types which were extended is dangerous
//
- static bool EqualsNullIsReferenceEquals (Type t)
+ void CheckBitwiseOrOnSignExtended ()
{
- return t == TypeManager.object_type || t == TypeManager.string_type ||
- t == TypeManager.delegate_type || t.IsSubclassOf (TypeManager.delegate_type);
+ 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 Warning_UnintendedReferenceComparison (Location loc, string side, Type type)
+ static void CreatePointerOperatorsTable ()
{
- 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));
+ ArrayList temp = new ArrayList ();
+
+ //
+ // Pointer arithmetic:
+ //
+ // 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));
+
+ pointer_operators = (PredefinedOperator []) temp.ToArray (typeof (PredefinedOperator));
}
- static void Warning_Constant_Result (Location loc, bool result, Type type)
+ static void CreateStandardOperatorsTable ()
{
- 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");
+ ArrayList temp = new ArrayList ();
+ Type bool_type = TypeManager.bool_type;
+
+ 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));
+
+ 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));
}
-
- Expression ResolveOperator (EmitContext ec)
- {
- Type l = left.Type;
- Type r = right.Type;
- 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;
- }
+ //
+ // Rules used during binary numeric promotion
+ //
+ static bool DoNumericPromotion (ref Expression prim_expr, ref Expression second_expr, Type type)
+ {
+ Expression temp;
+ Type etype;
- //
- // 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);
- }
+ Constant c = prim_expr as Constant;
+ if (c != null) {
+ temp = c.ConvertImplicitly (type);
+ if (temp != null) {
+ prim_expr = temp;
+ return true;
}
+ }
- 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;
- }
+ 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;
- //
- // 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);
+ 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) {
//
- // Optimize out call to op_Equality in a few cases.
+ // A compile-time error occurs if the other operand is of type sbyte, short, int, or long
//
- if ((l == TypeManager.null_type && EqualsNullIsReferenceEquals (r)) ||
- (r == TypeManager.null_type && EqualsNullIsReferenceEquals (l))) {
- Type = TypeManager.bool_type;
- return this;
- }
-
- // IntPtr equality
- if (l == TypeManager.intptr_type && r == TypeManager.intptr_type) {
- Type = TypeManager.bool_type;
- return this;
- }
+ if (type == TypeManager.int32_type || type == TypeManager.int64_type ||
+ type == TypeManager.sbyte_type || type == TypeManager.sbyte_type)
+ return false;
+ }
-#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;
- }
+ temp = Convert.ImplicitNumericConversion (prim_expr, type);
+ if (temp == null)
+ return false;
- if (mg != null) {
- Expression e = ImplicitDelegateCreation.Create (ec, mg, delegate_type, loc);
- if (e == null)
- return null;
+ prim_expr = temp;
+ return true;
+ }
- // Find operator method
- string op = oper_names[(int)oper];
- MemberInfo[] mi = TypeManager.MemberLookup(ec.ContainerType, null,
- TypeManager.delegate_type, MemberTypes.Method, AllBindingFlags, op, null);
+ //
+ // 7.2.6.2 Binary numeric promotions
+ //
+ public bool DoBinaryOperatorPromotion (EmitContext ec)
+ {
+ Type ltype = left.Type;
+ Type rtype = right.Type;
+ Expression temp;
- 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));
+ foreach (Type t in ConstantFold.binary_promotions) {
+ if (t == ltype)
+ return t == rtype || DoNumericPromotion (ref right, ref left, t);
- 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;
- }
+ if (t == rtype)
+ return t == ltype || DoNumericPromotion (ref left, ref right, t);
}
+ 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);
- //
- // Do not perform operator overload resolution when both sides are
- // built-in types
- //
- 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;
-
- if (union != null) {
- ArrayList args = new ArrayList (2);
- args.Add (new Argument (left, Argument.AType.Expression));
- args.Add (new Argument (right, Argument.AType.Expression));
+ if (temp == null)
+ return false;
+ left = temp;
+ }
- union = union.OverloadResolve (ec, args, true, Location.Null);
+ if (rtype != int32) {
+ Constant c = right as Constant;
+ if (c != null)
+ temp = c.ImplicitConversionRequired (int32, loc);
+ else
+ temp = Convert.ImplicitNumericConversion (right, int32);
- if (union != null) {
- MethodInfo mi = (MethodInfo) union;
- return new BinaryMethod (mi.ReturnType, mi, args);
- }
- }
+ if (temp == null)
+ return false;
+ right = temp;
}
- //
- // String concatenation
- //
- // string operator + (string x, string y);
- // string operator + (string x, object y);
- // string operator + (object x, string y);
- //
- if (oper == Operator.Addition && !TypeManager.IsDelegateType (l)) {
- //
- // Either left or right expression is implicitly convertible to string
- //
- if (OverloadResolve_PredefinedString (ec, oper)) {
- if (r == TypeManager.void_type || l == TypeManager.void_type) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ return true;
+ }
- //
- // Constants folding for strings and nulls
- //
- if (left.Type == TypeManager.string_type && right.Type == TypeManager.string_type &&
- left is Constant && right is Constant) {
- string lvalue = (string)((Constant) left).GetValue ();
- string rvalue = (string)((Constant) right).GetValue ();
- return new StringConstant (lvalue + rvalue, left.Location);
- }
+ public override Expression DoResolve (EmitContext ec)
+ {
+ if (left == null)
+ return null;
- //
- // Append to existing string concatenation
- //
- if (left is StringConcat) {
- ((StringConcat) left).Append (ec, right);
- return left;
- }
+ if ((oper == Operator.Subtraction) && (left is ParenthesizedExpression)) {
+ left = ((ParenthesizedExpression) left).Expr;
+ left = left.Resolve (ec, ResolveFlags.VariableOrValue | ResolveFlags.Type);
+ if (left == null)
+ return null;
- //
- // Otherwise, start a new concat expression using converted expression
- //
- return new StringConcat (ec, loc, left, right).Resolve (ec);
+ 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);
- //
- // Transform a + ( - b) into a - b
- //
- if (right is Unary){
- Unary right_unary = (Unary) right;
+ if (left == null)
+ return null;
- if (right_unary.Oper == Unary.Operator.UnaryNegation){
- return new Binary (Operator.Subtraction, left, right_unary.Expr).Resolve (ec);
- }
- }
- }
+ Constant lc = left as Constant;
- 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 (lc != null && lc.Type == TypeManager.bool_type &&
+ ((oper == Operator.LogicalAnd && lc.IsDefaultValue) ||
+ (oper == Operator.LogicalOr && !lc.IsDefaultValue))) {
- type = TypeManager.bool_type;
- return this;
- }
+ // FIXME: resolve right expression as unreachable
+ // right.Resolve (ec);
- if (l.IsPointer || r.IsPointer) {
- if (l.IsPointer && r.IsPointer) {
- type = TypeManager.bool_type;
- return this;
- }
+ Report.Warning (429, 4, loc, "Unreachable expression code detected");
+ return left;
+ }
- if (l.IsPointer && r == TypeManager.null_type) {
- right = new EmptyConstantCast (NullPointer.Null, l);
- type = TypeManager.bool_type;
- return this;
- }
+ right = right.Resolve (ec);
+ if (right == null)
+ return null;
- if (r.IsPointer && l == TypeManager.null_type) {
- left = new EmptyConstantCast (NullPointer.Null, r);
- type = TypeManager.bool_type;
- return this;
- }
- }
+ eclass = ExprClass.Value;
+ Constant rc = right as Constant;
-#if GMCS_SOURCE
- if (l.IsGenericParameter && r.IsGenericParameter) {
- GenericConstraints l_gc, r_gc;
+ // 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;
- l_gc = TypeManager.GetTypeParameterConstraints (l);
- r_gc = TypeManager.GetTypeParameterConstraints (r);
+ 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 ((l_gc == null) || (r_gc == null) ||
- !(l_gc.HasReferenceTypeConstraint || l_gc.HasClassConstraint) ||
- !(r_gc.HasReferenceTypeConstraint || r_gc.HasClassConstraint)) {
- Error_OperatorCannotBeApplied ();
+ if ((ResolveOperator (ec)) == null) {
+ Error_OperatorCannotBeApplied (left, right);
return null;
}
+ 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;
+
+ // The result is a constant with side-effect
+ return new SideEffectConstant (lc, right, loc);
}
-#endif
+ }
- //
- // 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;
+ // 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);
+ }
- 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);
+ if ((TypeManager.IsNullableType (left.Type) || TypeManager.IsNullableType (right.Type) ||
+ (left is NullLiteral && right.Type.IsValueType) || (right is NullLiteral && left.Type.IsValueType)))
+ return new Nullable.LiftedBinaryOperator (oper, left, right, loc).Resolve (ec);
- if (!left_to_right && !right_to_left) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ return DoResolveCore (ec, left, right);
+ }
- 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);
- }
+ 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 (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 (left == null || right == null)
+ throw new InternalErrorException ("Invalid conversion");
- //
- // 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);
+ if (oper == Operator.BitwiseOr)
+ CheckBitwiseOrOnSignExtended ();
- return this;
+ 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;
}
- // 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;
- }
- }
+ MethodInfo method;
+ ArrayList args = new ArrayList (2);
- 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;
+ args = new ArrayList (2);
+ args.Add (new Argument (left, Argument.AType.Expression));
+ args.Add (new Argument (right, Argument.AType.Expression));
- if (!TypeManager.IsEqual (l, r) && !(right is NullLiteral)) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ 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);
+ }
- return new BinaryDelegate (l, method, args);
- }
+ 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;
+ }
+
+ 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) {
//
- // 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)
+ // 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 (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);
+ if ((oper & Operator.ComparisonMask) != 0) {
+ type = TypeManager.bool_type;
+ } else if ((oper & Operator.BitwiseMask) != 0) {
+ type = ltype;
}
- }
-
- //
- // 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;
+ 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;
}
+
+ return this;
}
-
+ }
+
+ Type underlying_type;
+ if (lenum && !renum) {
//
- // operator + (E e, U x)
- // operator - (E e, U x)
+ // E operator + (E e, U x)
+ // E operator - (E e, U x)
//
- 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;
- }
-
- Error_OperatorCannotBeApplied ();
+ 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 = enum_type;
+ right = temp;
+ type = ltype;
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 ();
- return null;
- }
- type = TypeManager.bool_type;
- return this;
- }
+ return null;
+ }
- if (oper == Operator.BitwiseAnd ||
- oper == Operator.BitwiseOr ||
- oper == Operator.ExclusiveOr){
- if (left.Type != right.Type){
- Error_OperatorCannotBeApplied ();
+ 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;
- }
- type = l;
+
+ left = temp;
+ type = rtype;
return this;
}
- Error_OperatorCannotBeApplied ();
+ }
+
+ //
+ // U operator - (E e, E f)
+ //
+ if (oper == Operator.Subtraction) {
+ if (!TypeManager.IsEqual (ltype, rtype))
+ return null;
+
+ type = TypeManager.GetEnumUnderlyingType (ltype);
+ return this;
+ }
+
+ return null;
+ }
+
+ //
+ // 7.9.6 Reference type equality operators
+ //
+ Binary ResolveOperatorEqualityRerefence (EmitContext ec, Type l, Type r)
+ {
+ //
+ // operator != (object a, object b)
+ // operator == (object a, object b)
+ //
+
+ // TODO: this method is almost equivalent to Convert.ImplicitReferenceConversion
+
+ if (left.eclass == ExprClass.MethodGroup || right.eclass == ExprClass.MethodGroup)
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;
- }
+ type = TypeManager.bool_type;
+ GenericConstraints constraints;
- 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);
+ bool lgen = TypeManager.IsGenericParameter (l);
- if (left_operators_e != null && right_operators_e != null) {
- left = left_operators_e;
- right = right_operators_e;
- type = TypeManager.bool_type;
- return this;
+ 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;
}
- Expression e = new ConditionalLogicalOperator (
- oper == Operator.LogicalAnd, left, right, l, loc);
- return e.Resolve (ec);
- }
+ if (l == TypeManager.anonymous_method_type)
+ return null;
+
+ if (TypeManager.IsValueType (l))
+ return null;
+
+ return this;
+ }
- Expression orig_left = left;
- Expression orig_right = right;
+ bool rgen = TypeManager.IsGenericParameter (r);
//
- // operator & (bool x, bool y)
- // operator | (bool x, bool y)
- // operator ^ (bool x, bool y)
+ // 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 (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);
+ if (left is NullLiteral || right is NullLiteral) {
+ if (lgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (l);
+ if (constraints != null && constraints.HasValueTypeConstraint)
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 ();
- return null;
+ left = new BoxedCast (left, TypeManager.object_type);
+ return this;
}
- return this;
- }
-
- //
- // Pointer comparison
- //
- if (l.IsPointer && r.IsPointer){
- if (oper == Operator.LessThan || oper == Operator.LessThanOrEqual ||
- oper == Operator.GreaterThan || oper == Operator.GreaterThanOrEqual){
- type = TypeManager.bool_type;
+
+ if (rgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (r);
+ if (constraints != null && constraints.HasValueTypeConstraint)
+ return null;
+
+ right = new BoxedCast (right, 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;
- }
- } 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;
+ 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))
+ 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
+ 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?");
+ Expression oper_expr;
+
+ // TODO: CreateExpressionTree is allocated every time
+ if (user_oper != oper) {
+ oper_expr = new ConditionalLogicalOperator (union, args, CreateExpressionTree,
+ oper == Operator.LogicalAnd, loc).Resolve (ec);
+ } else {
+ oper_expr = new UserOperatorCall (union, args, CreateExpressionTree, loc);
+
+ //
+ // 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;
+ if (left is NullLiteral || right is NullLiteral)
+ oper_expr = ReducedExpression.Create (this, oper_expr).Resolve (ec);
+ } 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;
+ return oper_expr;
}
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 ||
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 is_unsigned = IsUnsigned (left.Type);
+ Type l = left.Type;
+ OpCode opcode;
switch (oper){
case Operator.Multiply:
if (ec.CheckState){
if (l == TypeManager.int32_type || l == TypeManager.int64_type)
opcode = OpCodes.Mul_Ovf;
- else if (is_unsigned)
+ else if (!IsFloat (l))
opcode = OpCodes.Mul_Ovf_Un;
else
opcode = OpCodes.Mul;
} else
opcode = OpCodes.Mul;
-
+
break;
-
+
case Operator.Division:
- if (is_unsigned)
+ if (IsUnsigned (l))
opcode = OpCodes.Div_Un;
else
opcode = OpCodes.Div;
break;
-
+
case Operator.Modulus:
- if (is_unsigned)
+ if (IsUnsigned (l))
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 (is_unsigned)
+ else if (!IsFloat (l))
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 (is_unsigned)
+ else if (!IsFloat (l))
opcode = OpCodes.Sub_Ovf_Un;
else
opcode = OpCodes.Sub;
break;
case Operator.RightShift:
- if (is_unsigned)
+ if (IsUnsigned (l))
opcode = OpCodes.Shr_Un;
else
opcode = OpCodes.Shr;
break;
case Operator.LessThan:
- if (is_unsigned)
+ if (IsUnsigned (l))
opcode = OpCodes.Clt_Un;
else
opcode = OpCodes.Clt;
break;
case Operator.GreaterThan:
- if (is_unsigned)
+ if (IsUnsigned (l))
opcode = OpCodes.Cgt_Un;
else
opcode = OpCodes.Cgt;
break;
case Operator.LessThanOrEqual:
- Type lt = left.Type;
-
- if (is_unsigned || (lt == TypeManager.double_type || lt == TypeManager.float_type))
+ if (IsUnsigned (l) || IsFloat (l))
ig.Emit (OpCodes.Cgt_Un);
else
ig.Emit (OpCodes.Cgt);
opcode = OpCodes.Ceq;
break;
-
- case Operator.GreaterThanOrEqual:
- Type le = left.Type;
-
- if (is_unsigned || (le == TypeManager.double_type || le == TypeManager.float_type))
- ig.Emit (OpCodes.Clt_Un);
- else
- ig.Emit (OpCodes.Clt);
-
- ig.Emit (OpCodes.Ldc_I4_0);
-
- opcode = OpCodes.Ceq;
+
+ case Operator.GreaterThanOrEqual:
+ if (IsUnsigned (l) || IsFloat (l))
+ ig.Emit (OpCodes.Clt_Un);
+ else
+ ig.Emit (OpCodes.Clt);
+
+ ig.Emit (OpCodes.Ldc_I4_0);
+
+ opcode = OpCodes.Ceq;
+ break;
+
+ case Operator.BitwiseOr:
+ opcode = OpCodes.Or;
+ break;
+
+ case Operator.BitwiseAnd:
+ opcode = OpCodes.And;
+ break;
+
+ case Operator.ExclusiveOr:
+ opcode = OpCodes.Xor;
+ break;
+
+ default:
+ throw new InternalErrorException (oper.ToString ());
+ }
+
+ ig.Emit (opcode);
+ }
+
+ protected override void CloneTo (CloneContext clonectx, Expression t)
+ {
+ Binary target = (Binary) t;
+
+ 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 && !IsFloat (left.Type))
+ method_name = "AddChecked";
+ else
+ method_name = "Add";
+ break;
+ case Operator.BitwiseAnd:
+ method_name = "And";
+ break;
+ case Operator.BitwiseOr:
+ method_name = "Or";
+ 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.Inequality:
+ method_name = "NotEqual";
+ lift_arg = true;
+ break;
+ case Operator.LeftShift:
+ method_name = "LeftShift";
+ break;
+ case Operator.LessThan:
+ method_name = "LessThan";
+ lift_arg = true;
+ break;
+ case Operator.LessThanOrEqual:
+ method_name = "LessThanOrEqual";
+ lift_arg = true;
+ break;
+ case Operator.LogicalAnd:
+ method_name = "AndAlso";
break;
-
- case Operator.BitwiseOr:
- opcode = OpCodes.Or;
+ case Operator.LogicalOr:
+ method_name = "OrElse";
break;
-
- case Operator.BitwiseAnd:
- opcode = OpCodes.And;
+ case Operator.Modulus:
+ method_name = "Modulo";
break;
-
- case Operator.ExclusiveOr:
- opcode = OpCodes.Xor;
+ case Operator.Multiply:
+ if (method == null && ec.CheckState && !IsFloat (left.Type))
+ method_name = "MultiplyChecked";
+ else
+ method_name = "Multiply";
+ break;
+ case Operator.RightShift:
+ method_name = "RightShift";
+ break;
+ case Operator.Subtraction:
+ if (method == null && ec.CheckState && !IsFloat (left.Type))
+ method_name = "SubtractChecked";
+ else
+ method_name = "Subtract";
break;
default:
- throw new Exception ("This should not happen: Operator = "
- + oper.ToString ());
+ throw new InternalErrorException ("Unknown expression tree binary operator " + oper);
}
- ig.Emit (opcode);
- }
-
- protected override void CloneTo (CloneContext clonectx, Expression t)
- {
- Binary target = (Binary) t;
-
- target.left = left.Clone (clonectx);
- target.right = right.Clone (clonectx);
+ 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)
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ Argument arg = (Argument) arguments [0];
+ return CreateExpressionAddCall (ec, arg, arg.Expr.CreateExpressionTree (ec), 1);
+ }
+
+ //
+ // Creates nested calls tree from an array of arguments used for IL emit
+ //
+ Expression CreateExpressionAddCall (EmitContext ec, Argument left, Expression left_etree, int pos)
{
- if (invalid)
+ ArrayList concat_args = new ArrayList (2);
+ ArrayList add_args = new ArrayList (3);
+
+ concat_args.Add (left);
+ add_args.Add (new Argument (left_etree));
+
+ concat_args.Add (arguments [pos]);
+ add_args.Add (new Argument (((Argument) arguments [pos]).Expr.CreateExpressionTree (ec)));
+
+ MethodGroupExpr method = CreateConcatMemberExpression ().Resolve (ec) as MethodGroupExpr;
+ if (method == null)
return null;
-
+
+ method = method.OverloadResolve (ec, ref concat_args, false, loc);
+ if (method == null)
+ return null;
+
+ add_args.Add (new Argument (method.CreateExpressionTree (ec)));
+
+ Expression expr = CreateExpressionFactoryCall ("Add", add_args);
+ if (++pos == arguments.Count)
+ return expr;
+
+ left = new Argument (new EmptyExpression (method.Type));
+ return CreateExpressionAddCall (ec, left, expr, pos);
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
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 CreateConcatMemberExpression ()
+ {
+ return new MemberAccess (new MemberAccess (new QualifiedAliasMember ("global", "System", loc), "String", loc), "Concat", loc);
}
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 = new Invocation (CreateConcatMemberExpression (), arguments, true);
+ 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;
+ //
+ public class ConditionalLogicalOperator : UserOperatorCall {
+ readonly bool is_and;
+ Expression oper;
- public ConditionalLogicalOperator (bool is_and, Expression left, Expression right, Type t, Location loc)
+ public ConditionalLogicalOperator (MethodGroupExpr oper_method, ArrayList arguments,
+ ExpressionTreeExpression expr_tree, bool is_and, Location loc)
+ : base (oper_method, arguments, expr_tree, loc)
{
- type = t;
- eclass = ExprClass.Value;
- this.loc = loc;
- this.left = left;
- this.right = right;
this.is_and = is_and;
}
-
- protected void Error19 ()
- {
- Binary.Error_OperatorCannotBeApplied (loc, is_and ? "&&" : "||", left.GetSignatureForError (), right.GetSignatureForError ());
- }
-
- protected void Error218 ()
- {
- Error (218, "The type ('" + TypeManager.CSharpName (type) + "') must contain " +
- "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;
-
- operator_group = MethodLookup (ec.ContainerType, type, is_and ? "op_BitwiseAnd" : "op_BitwiseOr", loc) as MethodGroupExpr;
- if (operator_group == null) {
- Error19 ();
- return null;
- }
-
- left_temp = new LocalTemporary (type);
-
- 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);
- if (operator_group == null) {
- Error19 ();
- return null;
- }
-
- MethodInfo method = (MethodInfo)operator_group;
- if (method.ReturnType != type) {
- Report.Error (217, loc, "In order to be applicable as a short circuit operator a user-defined logical operator `{0}' " +
- "must have the same return type as the type of its 2 parameters", TypeManager.CSharpSignature (method));
+ MethodInfo method = (MethodInfo)mg;
+ type = TypeManager.TypeToCoreType (method.ReturnType);
+ ParameterData pd = TypeManager.GetParameterData (method);
+ if (!TypeManager.IsEqual (type, type) || !TypeManager.IsEqual (type, pd.Types [0]) || !TypeManager.IsEqual (type, pd.Types [1])) {
+ Report.Error (217, loc,
+ "A user-defined operator `{0}' must have parameters and return values of the same type in order to be applicable as a short circuit operator",
+ TypeManager.CSharpSignature (method));
return null;
}
- op = new StaticCallExpr (method, arguments, loc);
-
- op_true = GetOperatorTrue (ec, left_temp, loc);
- op_false = GetOperatorFalse (ec, left_temp, loc);
- if ((op_true == null) || (op_false == null)) {
- Error218 ();
+ Expression left_dup = new EmptyExpression (type);
+ Expression op_true = GetOperatorTrue (ec, left_dup, loc);
+ Expression op_false = GetOperatorFalse (ec, left_dup, loc);
+ if (op_true == null || op_false == null) {
+ Report.Error (218, loc,
+ "The type `{0}' must have operator `true' and operator `false' defined when `{1}' is used as a short circuit operator",
+ TypeManager.CSharpName (type), TypeManager.CSharpSignature (method));
return null;
}
+ oper = is_and ? op_false : op_true;
+ eclass = ExprClass.Value;
return this;
}
public override void Emit (EmitContext ec)
{
ILGenerator ig = ec.ig;
- Label false_target = ig.DefineLabel ();
Label end_target = ig.DefineLabel ();
- left.Emit (ec);
- left_temp.Store (ec);
+ //
+ // Emit and duplicate left argument
+ //
+ ((Argument)arguments [0]).Expr.Emit (ec);
+ ig.Emit (OpCodes.Dup);
+ arguments.RemoveAt (0);
- (is_and ? op_false : op_true).EmitBranchable (ec, false_target, false);
- left_temp.Emit (ec);
- ig.Emit (OpCodes.Br, end_target);
- ig.MarkLabel (false_target);
- op.Emit (ec);
+ oper.EmitBranchable (ec, end_target, true);
+ base.Emit (ec);
ig.MarkLabel (end_target);
-
- // We release 'left_temp' here since 'op' may refer to it too
- left_temp.Release (ec);
}
}
}
}
+ 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, true_expr, false_expr, loc).Resolve (ec);
-#endif
-
if (expr.Type != TypeManager.bool_type){
expr = Expression.ResolveBoolean (
ec, expr, loc);
expr.EmitBranchable (ec, false_target, false);
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);
false_expr.Emit (ec);
}
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList arg = new ArrayList (1);
+ arg.Add (new Argument (this));
+ return CreateExpressionFactoryCall ("Constant", arg);
+ }
+
protected Expression DoResolveBase (EmitContext ec)
{
type = local_info.VariableType;
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 Expression expr;
protected MethodGroupExpr mg;
+ bool arguments_resolved;
//
// arguments is an ArrayList, but we do not want to typecast,
this.expr = expr;
Arguments = arguments;
- loc = expr.Location;
+ if (expr != null)
+ loc = expr.Location;
+ }
+
+ public Invocation (Expression expr, ArrayList arguments, bool arguments_resolved)
+ : this (expr, arguments)
+ {
+ this.arguments_resolved = arguments_resolved;
}
- public static string FullMethodDesc (MethodBase mb)
+ public override Expression CreateExpressionTree (EmitContext ec)
{
- if (mb == null)
- return "";
+ ArrayList args;
- StringBuilder sb;
- if (mb is MethodInfo) {
- sb = new StringBuilder (TypeManager.CSharpName (((MethodInfo) mb).ReturnType));
- sb.Append (" ");
+ //
+ // 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);
}
+
+ args = new ArrayList (Arguments.Count + 3);
+ if (mg.IsInstance)
+ args.Add (new Argument (mg.InstanceExpression.CreateExpressionTree (ec)));
else
- sb = new StringBuilder ();
+ args.Add (new Argument (new NullLiteral (loc).CreateExpressionTree (ec)));
+
+ 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));
+ }
- sb.Append (TypeManager.CSharpSignature (mb));
- return sb.ToString ();
+ return CreateExpressionFactoryCall ("Call", args);
}
public override Expression DoResolve (EmitContext ec)
return (new DelegateInvocation (
expr_resolved, Arguments, loc)).Resolve (ec);
}
+
+ MemberExpr me = expr_resolved as MemberExpr;
+ if (me == null) {
+ expr_resolved.Error_UnexpectedKind (ResolveFlags.MethodGroup, loc);
+ return null;
+ }
- expr_resolved.Error_UnexpectedKind (ResolveFlags.MethodGroup, loc);
- return null;
+ mg = ec.TypeContainer.LookupExtensionMethod (me.Type, me.Name, loc);
+ 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)
- {
+ if (Arguments != null && !arguments_resolved) {
for (int i = 0; i < Arguments.Count; ++i)
{
if (!((Argument)Arguments[i]).Resolve(ec, loc))
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) {
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 (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;
}
Cast cast = new Cast (new TypeExpression (type, loc), proxy, loc);
return cast.Resolve (ec);
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args = Arguments == null ?
+ new ArrayList (1) : new ArrayList (Arguments.Count + 1);
+
+ args.Add (new Argument (method.CreateExpressionTree (ec)));
+ if (Arguments != null) {
+ Expression expr;
+ foreach (Argument a in Arguments) {
+ expr = a.Expr.CreateExpressionTree (ec);
+ if (expr != null)
+ args.Add (new Argument (expr));
+ }
+ }
+
+ return CreateExpressionFactoryCall ("New", args);
+ }
public override Expression DoResolve (EmitContext ec)
{
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;
void Error_IncorrectArrayInitializer ()
{
- Error (178, "Invalid rank specifier: expected `,' or `]'");
+ 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 {
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));
+ }
}
}
}
//
// 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;
{
type = TypeManager.type_type;
typearg = TypeManager.void_type;
- // See description in TypeOf.
+
+ return DoResolveBase ();
+ }
+ }
+
+ internal class TypeOfMethod : Expression
+ {
+ readonly MethodBase method;
+
+ public TypeOfMethod (MethodBase method, Location loc)
+ {
+ this.method = method;
+ this.loc = loc;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ bool is_generic = TypeManager.IsGenericType (method.DeclaringType);
+ MethodInfo mi = is_generic ?
+ TypeManager.methodbase_get_type_from_handle_generic :
+ TypeManager.methodbase_get_type_from_handle;
+
+ if (mi == 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)
+ return null;
+
+ mi = TypeManager.GetPredefinedMethod (t, "GetMethodFromHandle", loc,
+ is_generic ?
+ new Type[] { handle_type, TypeManager.runtime_handle_type } :
+ new Type[] { handle_type } );
+
+ if (is_generic)
+ TypeManager.methodbase_get_type_from_handle_generic = mi;
+ else
+ TypeManager.methodbase_get_type_from_handle = mi;
+ }
+
+ type = typeof (MethodBase);
+ eclass = ExprClass.Value;
+ return this;
+ }
+
+ public override void Emit (EmitContext ec)
+ {
+ if (method is MethodInfo)
+ ec.ig.Emit (OpCodes.Ldtoken, (MethodInfo)method);
+ else
+ ec.ig.Emit (OpCodes.Ldtoken, (ConstructorInfo) method);
+
+ bool is_generic = TypeManager.IsGenericType (method.DeclaringType);
+ MethodInfo mi;
+ if (is_generic) {
+ mi = TypeManager.methodbase_get_type_from_handle_generic;
+ ec.ig.Emit (OpCodes.Ldtoken, method.DeclaringType);
+ } else {
+ mi = TypeManager.methodbase_get_type_from_handle;
+ }
+
+ ec.ig.Emit (OpCodes.Call, mi);
+ }
+ }
+
+ internal class TypeOfField : Expression
+ {
+ readonly FieldInfo field;
+
+ public TypeOfField (FieldInfo field, Location loc)
+ {
+ this.field = field;
+ this.loc = loc;
+ }
+
+ public override Expression DoResolve (EmitContext ec)
+ {
+ if (TypeManager.fieldinfo_get_field_from_handle == null) {
+ Type t = TypeManager.CoreLookupType ("System.Reflection", "FieldInfo", Kind.Class, true);
+ Type handle_type = TypeManager.CoreLookupType ("System", "RuntimeFieldHandle", Kind.Class, true);
+
+ if (t != null && handle_type != null)
+ TypeManager.fieldinfo_get_field_from_handle = TypeManager.GetPredefinedMethod (t,
+ "GetFieldFromHandle", loc, handle_type);
+ }
+
+ type = typeof (FieldInfo);
eclass = ExprClass.Value;
return this;
}
+
+ public override void Emit (EmitContext ec)
+ {
+ ec.ig.Emit (OpCodes.Ldtoken, field);
+ ec.ig.Emit (OpCodes.Call, TypeManager.fieldinfo_get_field_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.FeatureIsNotAvailable (l, "namespace alias qualifier");
-
this.alias = alias;
this.identifier = identifier;
loc = l;
}
Type expr_type = expr_resolved.Type;
- if (expr_type.IsPointer || expr_type == TypeManager.void_type || expr_resolved is NullLiteral){
+ if (expr_type.IsPointer || expr_type == TypeManager.void_type ||
+ expr_resolved is NullLiteral || expr_type == TypeManager.anonymous_method_type) {
Unary.Error_OperatorCannotBeApplied (loc, ".", expr_type);
return null;
}
- if (expr_type == TypeManager.anonymous_method_type){
- Unary.Error_OperatorCannotBeApplied (loc, ".", "anonymous method");
- return null;
- }
Constant c = expr_resolved as Constant;
if (c != null && c.GetValue () == null) {
"System.NullReferenceException");
}
- if (args != null)
- args.Resolve (ec);
+ if (args != null) {
+ if (!args.Resolve (ec))
+ return null;
+ }
Expression member_lookup;
member_lookup = MemberLookup (
}
#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) {
- ex_method_lookup.SetTypeArguments (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, loc);
+ 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);
+ }
}
expr = expr_resolved;
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 (texpr.Type.DeclaringType)) {
- 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)
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 = 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)
{
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){
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){
+ if (rank != 1 && TypeManager.int_getlength_int == null) {
+ TypeManager.int_getlength_int = TypeManager.GetPredefinedMethod (
+ TypeManager.array_type, "GetLength", loc, TypeManager.int32_type);
+ }
+
+ type = TypeManager.GetElementType (t);
+ if (type.IsPointer && !ec.InUnsafe) {
UnsafeError (ea.Location);
return null;
}
- 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;
+ 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;
}
for (int i = 0; i < ea.Arguments.Count; ++i) {
- ((Argument)ea.Arguments [i]).EmitArrayArgument (ec);
+ ((Argument)ea.Arguments [i]).Emit (ec);
if (!prepare_for_load)
continue;
}
MethodGroupExpr mg = new IndexerMethodGroupExpr (ilist, loc);
- mg = mg.OverloadResolve (ec, arguments, false, loc);
+ mg = mg.OverloadResolve (ec, ref arguments, false, loc);
if (mg == null)
return null;
}
}
- type = pi.PropertyType;
+ type = TypeManager.TypeToCoreType (pi.PropertyType);
if (type.IsPointer && !ec.InUnsafe)
UnsafeError (loc);
}
}
- instance_expr.CheckMarshalByRefAccess ();
+ instance_expr.CheckMarshalByRefAccess (ec);
eclass = ExprClass.IndexerAccess;
return this;
}
}
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);
}
}
#if GMCS_SOURCE
if ((dim.Length > 0) && (dim [0] == '?')) {
- TypeExpr nullable = new NullableType (left, loc);
+ TypeExpr nullable = new Nullable.NullableType (left, loc);
if (dim.Length > 1)
nullable = new ComposedCast (nullable, dim.Substring (1), loc);
return nullable.ResolveAsTypeTerminal (ec, false);
}
}
+ //
+ // 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);
//
// An object initializer expression
//
- public class ElementInitializer : Expression
+ public class ElementInitializer : Assign
{
- Expression initializer;
public readonly string Name;
public ElementInitializer (string name, Expression initializer, Location loc)
+ : base (null, initializer, loc)
{
this.Name = name;
- this.initializer = initializer;
- this.loc = loc;
}
- protected override void CloneTo (CloneContext clonectx, Expression t)
+ public override Expression CreateExpressionTree (EmitContext ec)
{
- if (initializer == null)
- return;
+ ArrayList args = new ArrayList (2);
+ FieldExpr fe = target as FieldExpr;
+ if (fe != null)
+ args.Add (new Argument (fe.CreateTypeOfExpression ()));
+ else
+ args.Add (new Argument (((PropertyExpr)target).CreateSetterTypeOfExpression ()));
- ElementInitializer target = (ElementInitializer) t;
- target.initializer = initializer.Clone (clonectx);
+ args.Add (new Argument (source.CreateExpressionTree (ec)));
+ return CreateExpressionFactoryCall (
+ source is CollectionOrObjectInitializers ? "ListBind" : "Bind",
+ args);
}
public override Expression DoResolve (EmitContext ec)
{
- if (initializer == null)
+ if (source == null)
return EmptyExpressionStatement.Instance;
- MemberExpr element_member = MemberLookupFinal (ec, ec.CurrentInitializerVariable.Type, ec.CurrentInitializerVariable.Type,
+ MemberExpr me = MemberLookupFinal (ec, ec.CurrentInitializerVariable.Type, ec.CurrentInitializerVariable.Type,
Name, MemberTypes.Field | MemberTypes.Property, BindingFlags.Public | BindingFlags.Instance, loc) as MemberExpr;
- if (element_member == null)
+ if (me == null)
return null;
- element_member.InstanceExpression = ec.CurrentInitializerVariable;
+ target = me;
+ me.InstanceExpression = ec.CurrentInitializerVariable;
- if (initializer is CollectionOrObjectInitializers) {
+ if (source is CollectionOrObjectInitializers) {
Expression previous = ec.CurrentInitializerVariable;
- ec.CurrentInitializerVariable = element_member;
- initializer = initializer.Resolve (ec);
+ ec.CurrentInitializerVariable = target;
+ source = source.Resolve (ec);
ec.CurrentInitializerVariable = previous;
- return initializer;
+ if (source == null)
+ return null;
+
+ eclass = source.eclass;
+ type = source.Type;
+ return this;
}
- Assign a = new Assign (element_member, initializer, loc);
- if (a.Resolve (ec) == null)
+ Expression expr = base.DoResolve (ec);
+ if (expr == 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)
+ Constant c = source as Constant;
+ if (c != null && c.IsDefaultInitializer (type) && target.eclass == ExprClass.Variable)
return EmptyExpressionStatement.Instance;
- return a;
+ return expr;
}
protected override Expression Error_MemberLookupFailed (MemberInfo[] members)
return null;
}
-
- public override void Emit (EmitContext ec)
+
+ public override void EmitStatement (EmitContext ec)
{
- throw new NotSupportedException ("Should not be reached");
+ if (source is CollectionOrObjectInitializers)
+ source.Emit (ec);
+ else
+ base.EmitStatement (ec);
}
}
//
// A collection initializer expression
//
- public class CollectionElementInitializer : Expression
+ public class CollectionElementInitializer : Invocation
{
public class ElementInitializerArgument : Argument
{
}
}
- ArrayList arguments;
-
public CollectionElementInitializer (Expression argument)
+ : base (null, new ArrayList (1), true)
{
- arguments = new ArrayList (1);
- arguments.Add (argument);
+ Arguments.Add (argument);
this.loc = argument.Location;
}
public CollectionElementInitializer (ArrayList arguments, Location loc)
+ : base (null, arguments, true)
{
- this.arguments = arguments;
this.loc = loc;
}
- protected override void CloneTo (CloneContext clonectx, Expression t)
+ public override Expression CreateExpressionTree (EmitContext ec)
{
- CollectionElementInitializer target = (CollectionElementInitializer) t;
- ArrayList t_arguments = target.arguments = new ArrayList (arguments.Count);
- foreach (Expression e in arguments)
- t_arguments.Add (e.Clone (clonectx));
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (mg.CreateExpressionTree (ec)));
+
+ ArrayList expr_initializers = new ArrayList (Arguments.Count);
+ foreach (Argument a in Arguments)
+ expr_initializers.Add (a.Expr.CreateExpressionTree (ec));
+
+ args.Add (new Argument (new ArrayCreation (
+ CreateExpressionTypeExpression (loc), "[]", expr_initializers, loc)));
+ return CreateExpressionFactoryCall ("ElementInit", args);
}
public override Expression DoResolve (EmitContext ec)
{
- // TODO: We should call a constructor which takes element counts argument,
- // for know types like List<T>, Dictionary<T, U>
+ if (eclass != ExprClass.Invalid)
+ return this;
+
+ // TODO: We could call a constructor which takes element count argument,
+ // for known types like List<T>, Dictionary<T, U>
- for (int i = 0; i < arguments.Count; ++i)
- arguments [i] = new ElementInitializerArgument ((Expression)arguments [i]);
+ for (int i = 0; i < Arguments.Count; ++i) {
+ Expression expr = ((Expression) Arguments [i]).Resolve (ec);
+ if (expr == null)
+ return null;
- Expression add_method = new Invocation (
- new MemberAccess (ec.CurrentInitializerVariable, "Add", loc),
- arguments);
+ Arguments [i] = new ElementInitializerArgument (expr);
+ }
- add_method = add_method.Resolve (ec);
+ base.expr = new MemberAccess (ec.CurrentInitializerVariable, "Add", loc);
- return add_method;
- }
-
- public override void Emit (EmitContext ec)
- {
- throw new NotSupportedException ("Should not be reached");
+ return base.DoResolve (ec);
}
}
}
}
+ public bool IsCollectionInitializer {
+ get {
+ return type == typeof (CollectionOrObjectInitializers);
+ }
+ }
+
protected override void CloneTo (CloneContext clonectx, Expression target)
{
CollectionOrObjectInitializers t = (CollectionOrObjectInitializers) target;
foreach (Expression e in initializers)
t.initializers.Add (e.Clone (clonectx));
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList expr_initializers = new ArrayList (initializers.Count);
+ foreach (Expression e in initializers) {
+ Expression expr = e.CreateExpressionTree (ec);
+ if (expr != null)
+ expr_initializers.Add (expr);
+ }
+
+ return new ImplicitlyTypedArrayCreation ("[]", expr_initializers, loc);
+ }
public override Expression DoResolve (EmitContext ec)
{
+ if (eclass != ExprClass.Invalid)
+ return this;
+
bool is_elements_initialization = false;
ArrayList element_names = null;
for (int i = 0; i < initializers.Count; ++i) {
if (e == EmptyExpressionStatement.Instance)
initializers.RemoveAt (i--);
else
- initializers [i] = e;
+ initializers [i] = e;
}
- type = typeof (CollectionOrObjectInitializers);
+ type = is_elements_initialization ? typeof (ElementInitializer) : typeof (CollectionOrObjectInitializers);
eclass = ExprClass.Variable;
return this;
}
this.new_instance = newInstance;
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ // Should not be reached
+ throw new NotSupportedException ();
+ }
+
public override Expression DoResolve (EmitContext ec)
{
return this;
target.initializers = (CollectionOrObjectInitializers) initializers.Clone (clonectx);
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (base.CreateExpressionTree (ec)));
+ args.Add (new Argument (initializers.CreateExpressionTree (ec)));
+
+ return CreateExpressionFactoryCall (
+ initializers.IsCollectionInitializer ? "ListInit" : "MemberInit",
+ args);
+ }
+
public override Expression DoResolve (EmitContext ec)
{
+ if (eclass != ExprClass.Invalid)
+ return this;
+
Expression e = base.DoResolve (ec);
if (type == null)
return null;
projects / mono.git / blobdiff