using System.Reflection.Emit;
using System.Text;
- /// <summary>
- /// This is just a helper class, it is generated by Unary, UnaryMutator
- /// when an overloaded method has been found. It just emits the code for a
- /// static call.
- /// </summary>
- public class StaticCallExpr : ExpressionStatement {
- ArrayList args;
- MethodInfo mi;
+ //
+ // This is an user operator expression, automatically created during
+ // resolve phase
+ //
+ public class UserOperatorCall : Expression {
+ public delegate Expression ExpressionTreeExpression (EmitContext ec, MethodGroupExpr mg);
- public StaticCallExpr (MethodInfo m, ArrayList a, Location l)
+ readonly ArrayList arguments;
+ readonly MethodGroupExpr mg;
+ readonly ExpressionTreeExpression expr_tree;
+
+ public UserOperatorCall (MethodGroupExpr mg, ArrayList args, ExpressionTreeExpression expr_tree, Location loc)
{
- mi = m;
- args = a;
+ this.mg = mg;
+ this.arguments = args;
+ this.expr_tree = expr_tree;
- type = m.ReturnType;
+ type = TypeManager.TypeToCoreType (((MethodInfo) mg).ReturnType);
eclass = ExprClass.Value;
- loc = l;
+ this.loc = loc;
+ }
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ if (expr_tree != null)
+ return expr_tree (ec, mg);
+
+ ArrayList args = new ArrayList (arguments.Count + 1);
+ args.Add (new Argument (new NullLiteral (loc).CreateExpressionTree (ec)));
+ args.Add (new Argument (mg.CreateExpressionTree (ec)));
+ foreach (Argument a in arguments) {
+ args.Add (new Argument (a.Expr.CreateExpressionTree (ec)));
+ }
+
+ return CreateExpressionFactoryCall ("Call", args);
}
public override Expression DoResolve (EmitContext ec)
public override void Emit (EmitContext ec)
{
- Invocation.EmitArguments (ec, 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;
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; }
}
}
Type expr_type = Expr.Type;
string op_name = oper_names [(int) Oper];
- Expression mg = MemberLookup (ec.ContainerType, expr_type, op_name, MemberTypes.Method, AllBindingFlags, loc);
- if (mg != null) {
- Expression e = StaticCallExpr.MakeSimpleCall (
- ec, (MethodGroupExpr) mg, Expr, loc);
+ MethodGroupExpr user_op = MemberLookup (ec.ContainerType, expr_type, op_name, MemberTypes.Method, AllBindingFlags, loc) as MethodGroupExpr;
+ if (user_op != null) {
+ ArrayList args = new ArrayList (1);
+ args.Add (new Argument (Expr));
+ user_op = user_op.OverloadResolve (ec, ref args, false, loc);
- if (e == null){
+ if (user_op == null) {
Error23 (expr_type);
return null;
}
-
- return e;
+
+ return new UserOperatorCall (user_op, args, CreateExpressionTree, loc);
}
switch (Oper){
return null;
}
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ return CreateExpressionTree (ec, null);
+ }
+
+ Expression CreateExpressionTree (EmitContext ec, MethodGroupExpr user_op)
+ {
+ string method_name;
+ switch (Oper) {
+ case Operator.UnaryNegation:
+ method_name = "Negate";
+ break;
+ case Operator.LogicalNot:
+ method_name = "Not";
+ break;
+ default:
+ throw new InternalErrorException ("Unknown unary operator " + Oper.ToString ());
+ }
+
+ ArrayList args = new ArrayList (2);
+ args.Add (new Argument (Expr.CreateExpressionTree (ec)));
+ if (user_op != null)
+ args.Add (new Argument (user_op.CreateExpressionTree (ec)));
+ return CreateExpressionFactoryCall (method_name, args);
+ }
+
public override Expression DoResolve (EmitContext ec)
{
if (Oper == Operator.AddressOf) {
public override void Emit (EmitContext ec)
{
ILGenerator ig = ec.ig;
-
+
switch (Oper) {
case Operator.UnaryPlus:
throw new Exception ("This should be caught by Resolve");
//
// This is expensive for the simplest case.
//
- StaticCallExpr method;
+ UserOperatorCall method;
public UnaryMutator (Mode m, Expression e, Location l)
{
(t == TypeManager.int64_type) ||
(t == TypeManager.uint64_type) ||
(t == TypeManager.char_type) ||
- (t.IsSubclassOf (TypeManager.enum_type)) ||
+ (TypeManager.IsSubclassOf (t, TypeManager.enum_type)) ||
(t == TypeManager.float_type) ||
(t == TypeManager.double_type) ||
(t.IsPointer && t != TypeManager.void_ptr_type);
mg = MemberLookup (ec.ContainerType, expr_type, op_name, MemberTypes.Method, AllBindingFlags, loc);
if (mg != null) {
- method = StaticCallExpr.MakeSimpleCall (
+ method = UserOperatorCall.MakeSimpleCall (
ec, (MethodGroupExpr) mg, expr, loc);
type = method.Type;
if (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;
}
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, bool lnull, bool rnull)
+ {
+ if (lnull)
+ return Convert.ImplicitConversionExists (ec, rexpr, right);
+ if (rnull)
+ return Convert.ImplicitConversionExists (ec, lexpr, left);
+
+ if (TypeManager.IsEqual (left, lexpr.Type) &&
+ TypeManager.IsEqual (right, rexpr.Type))
+ return true;
+
+ return Convert.ImplicitConversionExists (ec, lexpr, left) &&
+ Convert.ImplicitConversionExists (ec, rexpr, right);
+ }
+
+ public PredefinedOperator ResolveBetterOperator (EmitContext ec, Expression lexpr, Expression rexpr, PredefinedOperator best_operator)
+ {
+ int result = 0;
+ if (left != null && best_operator.left != null) {
+ result = MethodGroupExpr.BetterTypeConversion (ec, best_operator.left, left);
+ }
+
+ //
+ // When second arguments are same as the first one, the result is same
+ //
+ if (left != right || best_operator.left != best_operator.right) {
+ result |= MethodGroupExpr.BetterTypeConversion (ec, best_operator.right, right);
+ }
+
+ if (result == 0 || result > 2)
+ return null;
+
+ return result == 1 ? best_operator : this;
+ }
+ }
+
+ 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, bool lnull, bool rnull)
+ {
+ if (left == null) {
+ if (!lexpr.Type.IsPointer)
+ return false;
+ } else {
+ if (!Convert.ImplicitConversionExists (ec, lexpr, left))
+ return false;
+ }
+
+ if (right == null) {
+ if (!rexpr.Type.IsPointer)
+ return false;
+ } else {
+ if (!Convert.ImplicitConversionExists (ec, rexpr, right))
+ return false;
+ }
+
+ return true;
+ }
+
+ public override Expression ConvertResult (EmitContext ec, Binary b)
+ {
+ base.ConvertResult (ec, b);
+
+ Type r_type = ReturnType;
+ if (r_type == null) {
+ r_type = b.left.Type;
+ if (r_type == null)
+ r_type = b.right.Type;
+ }
+
+ return new PointerArithmetic (b.oper == Operator.Addition,
+ b.left, b.right, r_type, b.loc).Resolve (ec);
+ }
+ }
+
+ [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 ()
- {
- return "operator " + OperName (oper) + "(" + left.ToString () + ", " +
- right.ToString () + ")";
- }
-
- Expression ForceConversion (EmitContext ec, Expression expr, Type target_type)
+ static public void Error_OperatorCannotBeApplied (Location loc, string name, Type l, Type r)
{
- if (expr.Type == target_type)
- return expr;
-
- return Convert.ImplicitConversion (ec, expr, target_type, loc);
+ Error_OperatorCannotBeApplied (loc, name, TypeManager.CSharpName (l), TypeManager.CSharpName (r));
}
- void Error_OperatorAmbiguous (Location loc, Operator oper, Type l, Type r)
+ public static void Error_OperatorCannotBeApplied (Location loc, string name, string left, string right)
{
- Report.Error (
- 34, loc, "Operator `" + OperName (oper)
- + "' is ambiguous on operands of type `"
- + TypeManager.CSharpName (l) + "' "
- + "and `" + TypeManager.CSharpName (r)
- + "'");
+ Report.Error (19, loc, "Operator `{0}' cannot be applied to operands of type `{1}' and `{2}'",
+ name, left, right);
}
-
- bool IsConvertible (EmitContext ec, Expression le, Expression re, Type t)
+
+ protected void Error_OperatorCannotBeApplied (Expression left, Expression right)
{
- return Convert.ImplicitConversionExists (ec, le, t) && Convert.ImplicitConversionExists (ec, re, t);
+ 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);
+
+ if (right.eclass == ExprClass.MethodGroup)
+ r = left.ExprClassName;
+ else
+ r = TypeManager.CSharpName (right.Type);
+
+ Error_OperatorCannotBeApplied (Location, OperName (oper), l, r);
}
- bool VerifyApplicable_Predefined (EmitContext ec, Type t)
+ public static string GetOperatorMetadataName (Operator op)
{
- if (!IsConvertible (ec, left, right, t))
- return false;
- left = ForceConversion (ec, left, t);
- right = ForceConversion (ec, right, t);
- type = t;
- return true;
+ return oper_names [(int)(op & Operator.ValuesOnlyMask)];
}
- bool IsApplicable_String (EmitContext ec, Expression le, Expression re, Operator oper)
+ static bool IsUnsigned (Type t)
{
- bool l = Convert.ImplicitConversionExists (ec, le, TypeManager.string_type);
- bool r = Convert.ImplicitConversionExists (ec, re, TypeManager.string_type);
+ while (t.IsPointer)
+ t = TypeManager.GetElementType (t);
- if (oper == Operator.Equality || oper == Operator.Inequality)
- return l && r;
- if (oper == Operator.Addition)
- return l || r;
- return false;
+ return (t == TypeManager.uint32_type || t == TypeManager.uint64_type ||
+ t == TypeManager.ushort_type || t == TypeManager.byte_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;
- }
-
- Expression CheckShiftArguments (EmitContext ec)
- {
- Expression new_left = Make32or64 (ec, left);
- Expression new_right = ForceConversion (ec, right, TypeManager.int32_type);
- if (new_left == null || new_right == null) {
- Error_OperatorCannotBeApplied ();
- return null;
+ // 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;
+ }
}
- 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;
- }
- //
- // This is used to check if a test 'x == null' can be optimized to a reference equals,
- // i.e., not invoke op_Equality.
- //
- static bool EqualsNullIsReferenceEquals (Type t)
- {
- return t == TypeManager.object_type || t == TypeManager.string_type ||
- t == TypeManager.delegate_type || t.IsSubclassOf (TypeManager.delegate_type);
- }
+ if (standard_operators == null)
+ CreateStandardOperatorsTable ();
- static void Warning_UnintendedReferenceComparison (Location loc, string side, Type type)
- {
- 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));
+ return ResolveOperatorPredefined (ec, standard_operators, primitives_only);
}
- static void Warning_Constant_Result (Location loc, bool result, Type type)
- {
- Report.Warning (472, 2, loc, "The result of comparing `{0}' against null is always `{1}'. " +
- "This operation is undocumented and it is temporary supported for compatibility reasons only",
- TypeManager.CSharpName (type), result ? "true" : "false");
- }
-
- Expression ResolveOperator (EmitContext ec)
+ Constant EnumLiftUp (Constant left, Constant right)
{
- Type l = left.Type;
- Type r = right.Type;
+ switch (oper) {
+ case Operator.BitwiseOr:
+ case Operator.BitwiseAnd:
+ case Operator.ExclusiveOr:
+ case Operator.Equality:
+ case Operator.Inequality:
+ case Operator.LessThan:
+ case Operator.LessThanOrEqual:
+ case Operator.GreaterThan:
+ case Operator.GreaterThanOrEqual:
+ if (left is EnumConstant)
+ return left;
+
+ if (left.IsZeroInteger)
+ return new EnumConstant (left, right.Type);
+
+ break;
+
+ case Operator.Addition:
+ case Operator.Subtraction:
+ return left;
+
+ case Operator.Multiply:
+ case Operator.Division:
+ case Operator.Modulus:
+ case Operator.LeftShift:
+ case Operator.RightShift:
+ if (right is EnumConstant || left is EnumConstant)
+ break;
+ return left;
+ }
+ Error_OperatorCannotBeApplied (this.left, this.right);
+ return null;
+ }
- 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;
- }
+ //
+ // The `|' operator used on types which were extended is dangerous
+ //
+ void CheckBitwiseOrOnSignExtended ()
+ {
+ OpcodeCast lcast = left as OpcodeCast;
+ if (lcast != null) {
+ if (IsUnsigned (lcast.UnderlyingType))
+ lcast = null;
+ }
- //
- // 7.9.9 Equality operators and null
- //
- // CSC 2 has this behavior, it allows structs to be compared
- // with the null literal *outside* of a generics context and
- // inlines that as true or false.
- //
- // This is, in my opinion, completely wrong.
- //
- if (RootContext.Version != LanguageVersion.ISO_1 && l.IsValueType) {
- if (!TypeManager.IsPrimitiveType (l) && !TypeManager.IsEnumType (l)) {
- if (MemberLookup (ec.ContainerType, l, oper_names [(int)Operator.Equality], MemberTypes.Method, AllBindingFlags, loc) == null &&
- MemberLookup (ec.ContainerType, l, oper_names [(int)Operator.Inequality], MemberTypes.Method, AllBindingFlags, loc) == null) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
- }
+ OpcodeCast rcast = right as OpcodeCast;
+ if (rcast != null) {
+ if (IsUnsigned (rcast.UnderlyingType))
+ rcast = null;
+ }
- Warning_Constant_Result (loc, oper == Operator.Inequality, l);
- return new BoolConstant (oper == Operator.Inequality, loc);
- }
- }
+ if (lcast == null && rcast == null)
+ return;
- 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;
- }
+ // FIXME: consider constants
- //
- // 7.9.9 Equality operators and null
- //
- // CSC 2 has this behavior, it allows structs to be compared
- // with the null literal *outside* of a generics context and
- // inlines that as true or false.
- //
- // This is, in my opinion, completely wrong.
- //
- if (RootContext.Version != LanguageVersion.ISO_1 && r.IsValueType){
- if (!TypeManager.IsPrimitiveType (r) && !TypeManager.IsEnumType (r)) {
- if (MemberLookup (ec.ContainerType, r, oper_names [(int) Operator.Equality], MemberTypes.Method, AllBindingFlags, loc) == null &&
- MemberLookup (ec.ContainerType, r, oper_names [(int) Operator.Inequality], MemberTypes.Method, AllBindingFlags, loc) == null) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
- }
+ 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));
+ }
- Warning_Constant_Result (loc, oper == Operator.Inequality, r);
- return new BoolConstant (oper == Operator.Inequality, loc);
- }
- }
+ static void CreatePointerOperatorsTable ()
+ {
+ ArrayList temp = new ArrayList ();
- //
- // Optimize out call to op_Equality in a few cases.
- //
- if ((l == TypeManager.null_type && EqualsNullIsReferenceEquals (r)) ||
- (r == TypeManager.null_type && EqualsNullIsReferenceEquals (l))) {
- Type = TypeManager.bool_type;
- return this;
- }
+ //
+ // 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));
- // IntPtr equality
- if (l == TypeManager.intptr_type && r == TypeManager.intptr_type) {
- Type = TypeManager.bool_type;
- return this;
- }
+ //
+ // 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));
-#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;
- }
+ //
+ // long operator - (T* x, T *y)
+ //
+ temp.Add (new PredefinedPointerOperator (null, Operator.SubtractionMask, TypeManager.int64_type));
- if (mg != null) {
- Expression e = ImplicitDelegateCreation.Create (ec, mg, delegate_type, loc);
- if (e == null)
- return null;
+ pointer_operators = (PredefinedOperator []) temp.ToArray (typeof (PredefinedOperator));
+ }
- // Find operator method
- string op = oper_names[(int)oper];
- MemberInfo[] mi = TypeManager.MemberLookup(ec.ContainerType, null,
- TypeManager.delegate_type, MemberTypes.Method, AllBindingFlags, op, null);
+ static void CreateStandardOperatorsTable ()
+ {
+ ArrayList temp = new ArrayList ();
+ Type bool_type = TypeManager.bool_type;
- 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));
+ 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));
+ }
+
+ //
+ // Rules used during binary numeric promotion
+ //
+ static bool DoNumericPromotion (ref Expression prim_expr, ref Expression second_expr, Type type)
+ {
+ Expression temp;
+ Type etype;
- return new BinaryMethod (TypeManager.bool_type, (MethodInfo)mi [0], args);
+ Constant c = prim_expr as Constant;
+ if (c != null) {
+ temp = c.ConvertImplicitly (type);
+ if (temp != null) {
+ prim_expr = temp;
+ return true;
}
-#endif
- if (l == TypeManager.anonymous_method_type || r == TypeManager.anonymous_method_type) {
- Error_OperatorCannotBeApplied(Location, OperName(oper),
- left.ExprClassName, right.ExprClassName);
- return null;
- }
}
+ 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;
- //
- // 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))) {
+ 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) {
//
- // Step 1: Perform Operator Overload location
+ // A compile-time error occurs if the other operand is of type sbyte, short, int, or long
//
- 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 (type == TypeManager.int32_type || type == TypeManager.int64_type ||
+ type == TypeManager.sbyte_type || type == TypeManager.sbyte_type)
+ return false;
+ }
- if (union != null) {
- ArrayList args = new ArrayList (2);
- args.Add (new Argument (left, Argument.AType.Expression));
- args.Add (new Argument (right, Argument.AType.Expression));
+ temp = Convert.ImplicitNumericConversion (prim_expr, type);
+ if (temp == null)
+ return false;
- union = union.OverloadResolve (ec, ref args, true, Location.Null);
+ prim_expr = temp;
+ return true;
+ }
- if (union != null) {
- MethodInfo mi = (MethodInfo) union;
- return new BinaryMethod (mi.ReturnType, mi, args);
- }
- }
- }
+ //
+ // 7.2.6.2 Binary numeric promotions
+ //
+ public bool DoBinaryOperatorPromotion (EmitContext ec)
+ {
+ Type ltype = left.Type;
+ Type rtype = right.Type;
+ Expression 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;
- }
+ foreach (Type t in ConstantFold.binary_promotions) {
+ if (t == ltype)
+ return t == rtype || DoNumericPromotion (ref right, ref left, t);
- //
- // 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);
- }
+ if (t == rtype)
+ return t == ltype || DoNumericPromotion (ref left, ref right, t);
+ }
- //
- // Append to existing string concatenation
- //
- if (left is StringConcat) {
- ((StringConcat) left).Append (ec, right);
- return left;
- }
+ 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);
- //
- // Otherwise, start a new concat expression using converted expression
- //
- return new StringConcat (ec, loc, left, right).Resolve (ec);
- }
+ if (temp == null)
+ return false;
+ left = temp;
+ }
- //
- // Transform a + ( - b) into a - b
- //
- if (right is Unary){
- Unary right_unary = (Unary) right;
+ if (rtype != int32) {
+ Constant c = right as Constant;
+ if (c != null)
+ temp = c.ImplicitConversionRequired (int32, loc);
+ else
+ temp = Convert.ImplicitNumericConversion (right, int32);
- if (right_unary.Oper == Unary.Operator.UnaryNegation){
- return new Binary (Operator.Subtraction, left, right_unary.Expr).Resolve (ec);
- }
- }
+ if (temp == null)
+ return false;
+ right = temp;
}
- if (oper == Operator.Equality || oper == Operator.Inequality){
- if (l == TypeManager.bool_type || r == TypeManager.bool_type){
- if (r != TypeManager.bool_type || l != TypeManager.bool_type){
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ return true;
+ }
- type = TypeManager.bool_type;
- return this;
+ public override Expression DoResolve (EmitContext ec)
+ {
+ if (left == null)
+ return null;
+
+ if ((oper == Operator.Subtraction) && (left is ParenthesizedExpression)) {
+ left = ((ParenthesizedExpression) left).Expr;
+ left = left.Resolve (ec, ResolveFlags.VariableOrValue | ResolveFlags.Type);
+ if (left == null)
+ return null;
+
+ if (left.eclass == ExprClass.Type) {
+ Report.Error (75, loc, "To cast a negative value, you must enclose the value in parentheses");
+ return null;
}
+ } else
+ left = left.Resolve (ec);
- if (l.IsPointer || r.IsPointer) {
- if (l.IsPointer && r.IsPointer) {
- type = TypeManager.bool_type;
- return this;
- }
+ if (left == null)
+ return null;
- if (l.IsPointer && r == TypeManager.null_type) {
- right = new EmptyConstantCast (NullPointer.Null, l);
- type = TypeManager.bool_type;
- return this;
- }
+ Constant lc = left as Constant;
- if (r.IsPointer && l == TypeManager.null_type) {
- left = new EmptyConstantCast (NullPointer.Null, r);
- type = TypeManager.bool_type;
- return this;
- }
- }
+ if (lc != null && lc.Type == TypeManager.bool_type &&
+ ((oper == Operator.LogicalAnd && lc.IsDefaultValue) ||
+ (oper == Operator.LogicalOr && !lc.IsDefaultValue))) {
-#if GMCS_SOURCE
- if (l.IsGenericParameter && r.IsGenericParameter) {
- GenericConstraints l_gc, r_gc;
+ // FIXME: resolve right expression as unreachable
+ // right.Resolve (ec);
- l_gc = TypeManager.GetTypeParameterConstraints (l);
- r_gc = TypeManager.GetTypeParameterConstraints (r);
+ Report.Warning (429, 4, loc, "Unreachable expression code detected");
+ return left;
+ }
- if ((l_gc == null) || (r_gc == null) ||
- !(l_gc.HasReferenceTypeConstraint || l_gc.HasClassConstraint) ||
- !(r_gc.HasReferenceTypeConstraint || r_gc.HasClassConstraint)) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ right = right.Resolve (ec);
+ if (right == null)
+ return null;
- }
-#endif
+ eclass = ExprClass.Value;
+ Constant rc = right as Constant;
- //
- // 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;
+ // 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;
- if (l == r)
- return this;
-
- //
- // Also, a standard conversion must exist from either one
- //
- // NOTE: An interface is converted to the object before the
- // standard conversion is applied. It's not clear from the
- // standard but it looks like it works like that.
- //
- if (l.IsInterface)
- l = TypeManager.object_type;
- if (r.IsInterface)
- r = TypeManager.object_type;
-
- bool left_to_right =
- Convert.ImplicitStandardConversionExists (left, r);
- bool right_to_left = !left_to_right &&
- Convert.ImplicitStandardConversionExists (right, l);
+ right = rc = EnumLiftUp (rc, lc);
+ if (rc == null)
+ return null;
+ }
- if (!left_to_right && !right_to_left) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ if (rc != null && lc != null) {
+ int prev_e = Report.Errors;
+ Expression e = ConstantFold.BinaryFold (
+ ec, oper, lc, rc, loc);
+ if (e != null || Report.Errors != prev_e)
+ return e;
+ } else {
+ if ((oper == Operator.BitwiseAnd || oper == Operator.LogicalAnd) &&
+ ((lc != null && lc.IsDefaultValue) || (rc != null && rc.IsDefaultValue))) {
- if (left_to_right && left_operators != null &&
- Report.WarningLevel >= 2) {
- ArrayList args = new ArrayList (2);
- args.Add (new Argument (left, Argument.AType.Expression));
- args.Add (new Argument (left, Argument.AType.Expression));
- if (left_operators.OverloadResolve (ec, ref args, true, Location.Null) != null)
- Warning_UnintendedReferenceComparison (loc, "right", l);
+ if ((ResolveOperator (ec)) == null) {
+ Error_OperatorCannotBeApplied (left, right);
+ return null;
}
- if (right_to_left && right_operators != null &&
- Report.WarningLevel >= 2) {
- ArrayList args = new ArrayList (2);
- args.Add (new Argument (right, Argument.AType.Expression));
- args.Add (new Argument (right, Argument.AType.Expression));
- if (right_operators.OverloadResolve (ec, ref args, true, Location.Null) != null)
- Warning_UnintendedReferenceComparison (loc, "left", r);
+ if (rc != null) {
+ right = left;
+ lc = rc;
}
+
+ // TODO: there must be better way how to check that the expression
+ // does not have any mutator
+ if (right is MemberExpr)
+ return lc;
- //
- // We are going to have to convert to an object to compare
- //
- if (l != TypeManager.object_type)
- left = EmptyCast.Create (left, TypeManager.object_type);
- if (r != TypeManager.object_type)
- right = EmptyCast.Create (right, TypeManager.object_type);
+ // The result is a constant with side-effect
+ return new SideEffectConstant (lc, right, loc);
+ }
+ }
- return this;
+ // Comparison warnings
+ if ((oper & Operator.ComparisonMask) != 0) {
+ if (left.Equals (right)) {
+ Report.Warning (1718, 3, loc, "A comparison made to same variable. Did you mean to compare something else?");
}
+ CheckUselessComparison (lc, right.Type);
+ CheckUselessComparison (rc, left.Type);
}
- // Only perform numeric promotions on:
- // +, -, *, /, %, &, |, ^, ==, !=, <, >, <=, >=
- //
- if (oper == Operator.Addition || oper == Operator.Subtraction) {
- if (TypeManager.IsDelegateType (l)){
- if (((right.eclass == ExprClass.MethodGroup) ||
- (r == TypeManager.anonymous_method_type))){
- if ((RootContext.Version != LanguageVersion.ISO_1)){
- Expression tmp = Convert.ImplicitConversionRequired (ec, right, l, loc);
- if (tmp == null)
- return null;
- right = tmp;
- r = right.Type;
- }
- }
+ if ((TypeManager.IsNullableType (left.Type) || TypeManager.IsNullableType (right.Type) ||
+ (left is NullLiteral && right.Type.IsValueType) || (right is NullLiteral && left.Type.IsValueType)) &&
+ !(this is Nullable.LiftedBinaryOperator))
+ return new Nullable.LiftedBinaryOperator (oper, left, right, loc).Resolve (ec);
- if (TypeManager.IsDelegateType (r) || right is NullLiteral){
- MethodInfo method;
- ArrayList args = new ArrayList (2);
-
- args = new ArrayList (2);
- args.Add (new Argument (left, Argument.AType.Expression));
- args.Add (new Argument (right, Argument.AType.Expression));
-
- if (oper == Operator.Addition)
- method = TypeManager.delegate_combine_delegate_delegate;
- else
- method = TypeManager.delegate_remove_delegate_delegate;
+ return DoResolveCore (ec, left, right);
+ }
- if (!TypeManager.IsEqual (l, r) && !(right is NullLiteral)) {
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ protected Expression DoResolveCore (EmitContext ec, Expression left_orig, Expression right_orig)
+ {
+ Expression expr = ResolveOperator (ec);
+ if (expr == null)
+ Error_OperatorCannotBeApplied (left_orig, right_orig);
- return new BinaryDelegate (l, method, args);
- }
- }
+ if (left == null || right == null)
+ throw new InternalErrorException ("Invalid conversion");
- //
- // Pointer arithmetic:
- //
- // T* operator + (T* x, int y);
- // T* operator + (T* x, uint y);
- // T* operator + (T* x, long y);
- // T* operator + (T* x, ulong y);
- //
- // T* operator + (int y, T* x);
- // T* operator + (uint y, T *x);
- // T* operator + (long y, T *x);
- // T* operator + (ulong y, T *x);
- //
- // T* operator - (T* x, int y);
- // T* operator - (T* x, uint y);
- // T* operator - (T* x, long y);
- // T* operator - (T* x, ulong y);
- //
- // long operator - (T* x, T *y)
- //
- if (l.IsPointer){
- if (r.IsPointer && oper == Operator.Subtraction){
- if (r == l)
- return new PointerArithmetic (
- false, left, right, TypeManager.int64_type,
- loc).Resolve (ec);
- } else {
- Expression t = Make32or64 (ec, right);
- if (t != null)
- return new PointerArithmetic (oper == Operator.Addition, left, t, l, loc).Resolve (ec);
- }
- } else if (r.IsPointer && oper == Operator.Addition){
- Expression t = Make32or64 (ec, left);
- if (t != null)
- return new PointerArithmetic (true, right, t, r, loc).Resolve (ec);
+ if (oper == Operator.BitwiseOr)
+ CheckBitwiseOrOnSignExtended ();
+
+ return expr;
+ }
+
+ //
+ // D operator + (D x, D y)
+ // D operator - (D x, D y)
+ //
+ Expression ResolveOperatorDelegateBinary (EmitContext ec, Type l, Type r)
+ {
+ if (((right.eclass == ExprClass.MethodGroup) || (r == TypeManager.anonymous_method_type))) {
+ if ((RootContext.Version != LanguageVersion.ISO_1)) {
+ Expression tmp = Convert.ImplicitConversionRequired (ec, right, l, loc);
+ if (tmp == null)
+ return null;
+ right = tmp;
+ r = right.Type;
}
+ } else {
+ if (!TypeManager.IsEqual (l, r) && !(right is NullLiteral))
+ return null;
}
-
- //
- // Enumeration operators
- //
- bool lie = TypeManager.IsEnumType (l);
- bool rie = TypeManager.IsEnumType (r);
- if (lie || rie){
- Expression temp;
- // U operator - (E e, E f)
- if (lie && rie){
- if (oper == Operator.Subtraction){
- if (l == r){
- type = TypeManager.EnumToUnderlying (l);
- return this;
- }
- Error_OperatorCannotBeApplied ();
- return null;
- }
+ 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) {
+ 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);
}
-
+
+ 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) {
//
- // operator + (E e, U x)
- // operator - (E e, U x)
+ // bool operator == (E x, E y);
+ // bool operator != (E x, E y);
+ // bool operator < (E x, E y);
+ // bool operator > (E x, E y);
+ // bool operator <= (E x, E y);
+ // bool operator >= (E x, E y);
//
- if (oper == Operator.Addition || oper == Operator.Subtraction){
- Type enum_type = lie ? l : r;
- Type other_type = lie ? r : l;
- Type underlying_type = TypeManager.EnumToUnderlying (enum_type);
-
- if (underlying_type != other_type){
- temp = Convert.ImplicitConversion (ec, lie ? right : left, underlying_type, loc);
- if (temp != null){
- if (lie)
- right = temp;
- else
- left = temp;
- type = enum_type;
- return this;
+ if ((oper & Operator.ComparisonMask) != 0) {
+ type = TypeManager.bool_type;
+ } else if ((oper & Operator.BitwiseMask) != 0) {
+ type = ltype;
+ }
+
+ if (type != null) {
+ if (!TypeManager.IsEqual (ltype, rtype)) {
+ if (!lenum) {
+ temp = Convert.ImplicitConversion (ec, left, rtype, loc);
+ if (temp == null)
+ return null;
+ left = temp;
+ } else {
+ temp = Convert.ImplicitConversion (ec, right, ltype, loc);
+ if (temp == null)
+ return null;
+ right = temp;
}
-
- Error_OperatorCannotBeApplied ();
- return null;
}
- type = enum_type;
return this;
}
-
- if (!rie){
- temp = Convert.ImplicitConversion (ec, right, l, loc);
- if (temp != null)
- right = temp;
- else {
- Error_OperatorCannotBeApplied ();
- return null;
- }
- } if (!lie){
- temp = Convert.ImplicitConversion (ec, left, r, loc);
- if (temp != null){
- left = temp;
- l = r;
- } else {
- Error_OperatorCannotBeApplied ();
- return null;
- }
- }
+ }
- if (oper == Operator.Equality || oper == Operator.Inequality ||
- oper == Operator.LessThanOrEqual || oper == Operator.LessThan ||
- oper == Operator.GreaterThanOrEqual || oper == Operator.GreaterThan){
- if (left.Type != right.Type){
- Error_OperatorCannotBeApplied ();
+ Type underlying_type;
+ if (lenum && !renum) {
+ //
+ // E operator + (E e, U x)
+ // E operator - (E e, U x)
+ //
+ if (oper == Operator.Addition || oper == Operator.Subtraction) {
+ underlying_type = TypeManager.GetEnumUnderlyingType (ltype);
+ temp = Convert.ImplicitConversion (ec, right, underlying_type, loc);
+ if (temp == null)
return null;
- }
- type = TypeManager.bool_type;
- return this;
- }
- if (oper == Operator.BitwiseAnd ||
- oper == Operator.BitwiseOr ||
- oper == Operator.ExclusiveOr){
- if (left.Type != right.Type){
- Error_OperatorCannotBeApplied ();
- return null;
- }
- type = l;
+ right = temp;
+ type = ltype;
return this;
}
- Error_OperatorCannotBeApplied ();
+
return null;
}
-
- if (oper == Operator.LeftShift || oper == Operator.RightShift)
- return CheckShiftArguments (ec);
-
- if (oper == Operator.LogicalOr || oper == Operator.LogicalAnd){
- if (l == TypeManager.bool_type && r == TypeManager.bool_type) {
- type = TypeManager.bool_type;
- return this;
- }
- Expression left_operators_e = l == TypeManager.bool_type ?
- left : Convert.ImplicitUserConversion (ec, left, TypeManager.bool_type, loc);
- Expression right_operators_e = r == TypeManager.bool_type ?
- right : Convert.ImplicitUserConversion (ec, right, TypeManager.bool_type, loc);
+ if (renum) {
+ //
+ // E operator + (U x, E e)
+ //
+ if (oper == Operator.Addition) {
+ underlying_type = TypeManager.GetEnumUnderlyingType (rtype);
+ temp = Convert.ImplicitConversion (ec, left, underlying_type, loc);
+ if (temp == null)
+ return null;
- if (left_operators_e != null && right_operators_e != null) {
- left = left_operators_e;
- right = right_operators_e;
- type = TypeManager.bool_type;
+ left = temp;
+ type = rtype;
return this;
}
+ }
- Expression e = new ConditionalLogicalOperator (
- oper == Operator.LogicalAnd, left, right, l, loc);
- return e.Resolve (ec);
- }
+ //
+ // U operator - (E e, E f)
+ //
+ if (oper == Operator.Subtraction) {
+ if (!TypeManager.IsEqual (ltype, rtype))
+ return null;
- Expression orig_left = left;
- Expression orig_right = right;
+ type = TypeManager.GetEnumUnderlyingType (ltype);
+ return this;
+ }
+ return null;
+ }
+
+ //
+ // 7.9.6 Reference type equality operators
+ //
+ Binary ResolveOperatorEqualityRerefence (EmitContext ec, Type l, Type r)
+ {
//
- // operator & (bool x, bool y)
- // operator | (bool x, bool y)
- // operator ^ (bool x, bool y)
+ // operator != (object a, object b)
+ // operator == (object a, object b)
//
- if (oper == Operator.BitwiseAnd ||
- oper == Operator.BitwiseOr ||
- oper == Operator.ExclusiveOr) {
- if (OverloadResolve_PredefinedIntegral (ec)) {
- if (IsConvertible (ec, orig_left, orig_right, TypeManager.bool_type)) {
- Error_OperatorAmbiguous (loc, oper, l, r);
- return null;
- }
- if (oper == Operator.BitwiseOr && l != r && !(orig_right is Constant) && right is OpcodeCast &&
- (r == TypeManager.sbyte_type || r == TypeManager.short_type ||
- r == TypeManager.int32_type || r == TypeManager.int64_type)) {
- Report.Warning (675, 3, loc, "The operator `|' used on the sign-extended type `{0}'. Consider casting to a smaller unsigned type first",
- TypeManager.CSharpName (r));
- }
-
- } else if (!VerifyApplicable_Predefined (ec, TypeManager.bool_type)) {
- Error_OperatorCannotBeApplied ();
+ // TODO: this method is almost equivalent to Convert.ImplicitReferenceConversion
+
+ if (left.eclass == ExprClass.MethodGroup || right.eclass == ExprClass.MethodGroup)
+ return null;
+
+ type = TypeManager.bool_type;
+ GenericConstraints constraints;
+
+ bool lgen = TypeManager.IsGenericParameter (l);
+
+ if (TypeManager.IsEqual (l, r)) {
+ if (lgen) {
+ //
+ // Only allow to compare same reference type parameter
+ //
+ constraints = TypeManager.GetTypeParameterConstraints (l);
+ if (constraints != null && constraints.IsReferenceType)
+ return this;
+
return null;
}
+
+ if (l == TypeManager.anonymous_method_type)
+ return null;
+
+ if (TypeManager.IsValueType (l))
+ return null;
+
return this;
}
-
+
+ bool rgen = TypeManager.IsGenericParameter (r);
+
//
- // Pointer comparison
+ // a, Both operands are reference-type values or the value null
+ // b, One operand is a value of type T where T is a type-parameter and
+ // the other operand is the value null. Furthermore T does not have the
+ // value type constrain
//
- if (l.IsPointer && r.IsPointer){
- if (oper == Operator.LessThan || oper == Operator.LessThanOrEqual ||
- oper == Operator.GreaterThan || oper == Operator.GreaterThanOrEqual){
- type = TypeManager.bool_type;
+ if (left is NullLiteral || right is NullLiteral) {
+ if (lgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (l);
+ if (constraints != null && constraints.HasValueTypeConstraint)
+ return null;
+
+ left = new BoxedCast (left, TypeManager.object_type);
return this;
}
- }
- if (OverloadResolve_PredefinedIntegral (ec)) {
- if (IsApplicable_String (ec, orig_left, orig_right, oper)) {
- Error_OperatorAmbiguous (loc, oper, l, r);
- return null;
+ if (rgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (r);
+ if (constraints != null && constraints.HasValueTypeConstraint)
+ return null;
+
+ right = new BoxedCast (right, TypeManager.object_type);
+ return this;
}
- } else if (OverloadResolve_PredefinedFloating (ec)) {
- if (IsConvertible (ec, orig_left, orig_right, TypeManager.decimal_type) ||
- IsApplicable_String (ec, orig_left, orig_right, oper)) {
- Error_OperatorAmbiguous (loc, oper, l, r);
+ }
+
+ //
+ // An interface is converted to the object before the
+ // standard conversion is applied. It's not clear from the
+ // standard but it looks like it works like that.
+ //
+ if (lgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (l);
+ if (constraints == null || constraints.IsReferenceType)
return null;
- }
- } else if (VerifyApplicable_Predefined (ec, TypeManager.decimal_type)) {
- if (IsApplicable_String (ec, orig_left, orig_right, oper)) {
- Error_OperatorAmbiguous (loc, oper, l, r);
+ } else if (l.IsInterface) {
+ l = TypeManager.object_type;
+ }
+
+ if (rgen) {
+ constraints = TypeManager.GetTypeParameterConstraints (r);
+ if (constraints == null || constraints.IsReferenceType)
return null;
- }
- } else if (!OverloadResolve_PredefinedString (ec, oper)) {
- Error_OperatorCannotBeApplied ();
- return null;
+ } else if (r.IsInterface) {
+ r = TypeManager.object_type;
}
- if (oper == Operator.Equality ||
- oper == Operator.Inequality ||
- oper == Operator.LessThanOrEqual ||
- oper == Operator.LessThan ||
- oper == Operator.GreaterThanOrEqual ||
- oper == Operator.GreaterThan)
- type = TypeManager.bool_type;
+ const string ref_comparison = "Possible unintended reference comparison. " +
+ "Consider casting the {0} side of the expression to `string' to compare the values";
+
+ //
+ // 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;
+ }
- l = left.Type;
- r = right.Type;
+ if (Convert.ImplicitReferenceConversionExists (right, l)) {
+ if (r == TypeManager.string_type)
+ Report.Warning (252, 2, loc, ref_comparison, "left");
+
+ return this;
+ }
+
+ return null;
+ }
+
+
+ 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;
+ }
+
+ if (!r.IsPointer) {
+ temp = Convert.ImplicitConversion (ec, right, l, right.Location);
+ if (temp == null)
+ return null;
+ right = temp;
+ }
- if (l == TypeManager.decimal_type || l == TypeManager.string_type || r == TypeManager.string_type) {
- Type lookup = 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, ref args, true, Location.Null);
- return new BinaryMethod (type, (MethodInfo)ops, args);
+ type = TypeManager.bool_type;
+ return this;
}
- return this;
+ if (pointer_operators == null)
+ CreatePointerOperatorsTable ();
+
+ return ResolveOperatorPredefined (ec, pointer_operators, false);
}
- Constant EnumLiftUp (Constant left, Constant right)
+ //
+ // Build-in operators method overloading
+ //
+ protected virtual Expression ResolveOperatorPredefined (EmitContext ec, PredefinedOperator [] operators, bool primitives_only)
{
- 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);
+ PredefinedOperator best_operator = null;
+ Type l = left.Type;
+ Operator oper_mask = oper & ~Operator.ValuesOnlyMask;
- break;
+ bool left_is_null = left is NullLiteral && RootContext.Version >= LanguageVersion.ISO_2;
+ bool right_is_null = right is NullLiteral && RootContext.Version >= LanguageVersion.ISO_2;
+
+ foreach (PredefinedOperator po in operators) {
+ if ((po.OperatorsMask & oper_mask) == 0)
+ continue;
- case Operator.Addition:
- case Operator.Subtraction:
- return left;
+ if (primitives_only) {
+ if (!po.IsPrimitiveApplicable (l))
+ continue;
+ } else {
+ if (!po.IsApplicable (ec, left, right, left_is_null, right_is_null))
+ continue;
+ }
- case Operator.Multiply:
- case Operator.Division:
- case Operator.Modulus:
- case Operator.LeftShift:
- case Operator.RightShift:
- if (right is EnumConstant || left is EnumConstant)
+ if (best_operator == null) {
+ best_operator = po;
+ if (primitives_only)
break;
- return left;
- }
- Error_OperatorCannotBeApplied ();
- return null;
- }
-
- public override Expression DoResolve (EmitContext ec)
- {
- if (left == null)
- return null;
-
- if ((oper == Operator.Subtraction) && (left is ParenthesizedExpression)) {
- left = ((ParenthesizedExpression) left).Expr;
- left = left.Resolve (ec, ResolveFlags.VariableOrValue | ResolveFlags.Type);
- if (left == null)
- return null;
- if (left.eclass == ExprClass.Type) {
- Report.Error (75, loc, "To cast a negative value, you must enclose the value in parentheses");
- return null;
+ continue;
}
- } else
- left = left.Resolve (ec);
- if (left == null)
- return null;
+ best_operator = po.ResolveBetterOperator (ec, left, right, best_operator);
- 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))) {
+ 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 ());
- // 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;
+ break;
+ }
}
- right = right.Resolve (ec);
- if (right == null)
+ if (best_operator == null)
return null;
- eclass = ExprClass.Value;
- Constant rc = right as Constant;
+ return best_operator.ConvertResult (ec, this);
+ }
- // The conversion rules are ignored in enum context but why
- if (!ec.InEnumContext && lc != null && rc != null && (TypeManager.IsEnumType (left.Type) || TypeManager.IsEnumType (right.Type))) {
- left = lc = EnumLiftUp (lc, rc);
- if (lc == null)
- return null;
+ //
+ // Performs user-operator overloading
+ //
+ protected virtual Expression ResolveUserOperator (EmitContext ec, Type l, Type r)
+ {
+ Operator user_oper;
+ if (oper == Operator.LogicalAnd)
+ user_oper = Operator.BitwiseAnd;
+ else if (oper == Operator.LogicalOr)
+ user_oper = Operator.BitwiseOr;
+ else
+ user_oper = oper;
- right = rc = EnumLiftUp (rc, lc);
- if (rc == null)
- return null;
- }
+ string op = GetOperatorMetadataName (user_oper);
- if (oper == Operator.BitwiseAnd) {
- if (rc != null && rc.IsZeroInteger) {
- return lc is EnumConstant ?
- new EnumConstant (rc, lc.Type):
- rc;
- }
+ MethodGroupExpr union;
+ MethodGroupExpr left_operators = MemberLookup (ec.ContainerType, l, op, MemberTypes.Method, AllBindingFlags, loc) as MethodGroupExpr;
+ if (!TypeManager.IsEqual (r, l)) {
+ MethodGroupExpr right_operators = MemberLookup (
+ ec.ContainerType, r, op, MemberTypes.Method, AllBindingFlags, loc) as MethodGroupExpr;
+ union = MethodGroupExpr.MakeUnionSet (left_operators, right_operators, loc);
+ } else
+ union = left_operators;
- if (lc != null && lc.IsZeroInteger) {
- return rc is EnumConstant ?
- new EnumConstant (lc, rc.Type):
- lc;
- }
- }
- else if (oper == Operator.BitwiseOr) {
- if (lc is EnumConstant &&
- rc != null && rc.IsZeroInteger)
- return lc;
- if (rc is EnumConstant &&
- lc != null && lc.IsZeroInteger)
- return rc;
- } else if (oper == Operator.LogicalAnd) {
- if (rc != null && rc.IsDefaultValue && rc.Type == TypeManager.bool_type)
- return rc;
- if (lc != null && lc.IsDefaultValue && lc.Type == TypeManager.bool_type)
- return lc;
- }
+ if (union == null)
+ return null;
- if (rc != null && lc != null){
- int prev_e = Report.Errors;
- Expression e = ConstantFold.BinaryFold (
- ec, oper, lc, rc, loc);
- if (e != null || Report.Errors != prev_e)
- return e;
- }
+ ArrayList args = new ArrayList (2);
+ Argument larg = new Argument (left);
+ args.Add (larg);
+ Argument rarg = new Argument (right);
+ args.Add (rarg);
-#if GMCS_SOURCE
- if ((left is NullLiteral || left.Type.IsValueType) &&
- (right is NullLiteral || right.Type.IsValueType) &&
- !(left is NullLiteral && right is NullLiteral) &&
- (TypeManager.IsNullableType (left.Type) || TypeManager.IsNullableType (right.Type)))
- return new Nullable.LiftedBinaryOperator (oper, left, right, loc).Resolve (ec);
-#endif
+ //
+ // TODO: Rewrite !
+ // Aparrently user-operators use different overloading rules especially for lifted arguments.
+ // Some details are in 6.4.2, 7.2.7
+ // Case 1: Arguments can be lifted for equal operators when the return type is bool and both
+ // arguments are of same type and they are convertible.
+ //
+ union = union.OverloadResolve (ec, ref args, true, loc);
+ if (union == null)
+ return null;
- // Comparison warnings
- if (oper == Operator.Equality || oper == Operator.Inequality ||
- oper == Operator.LessThanOrEqual || oper == Operator.LessThan ||
- oper == Operator.GreaterThanOrEqual || oper == Operator.GreaterThan){
- if (left.Equals (right)) {
- Report.Warning (1718, 3, loc, "A comparison made to same variable. Did you mean to compare something else?");
+ if (user_oper != oper) {
+ // FIXME: This has to derive from UserOperatorCall to handle expression tree
+ return new ConditionalLogicalOperator (oper == Operator.LogicalAnd,
+ left, right, left.Type, loc).Resolve (ec);
+ }
+
+ //
+ // This is used to check if a test 'x == null' can be optimized to a reference equals,
+ // and not invoke user operator
+ //
+ if ((oper & Operator.EqualityMask) != 0) {
+ if ((left is NullLiteral && IsBuildInEqualityOperator (r)) ||
+ (right is NullLiteral && IsBuildInEqualityOperator (l))) {
+ type = TypeManager.bool_type;
+ // FIXME: this breaks expression tree
+ if (left is NullLiteral || right is NullLiteral)
+ return this;
+ } else if (union.DeclaringType == TypeManager.delegate_type && l != r) {
+ //
+ // Two System.Delegate(s) are never equal
+ //
+ return null;
}
- CheckUselessComparison (lc, right.Type);
- CheckUselessComparison (rc, left.Type);
}
- return ResolveOperator (ec);
+ left = larg.Expr;
+ right = rarg.Expr;
+ // TODO: CreateExpressionTree is allocated every time
+ return new UserOperatorCall (union, args, CreateExpressionTree, loc);
}
public override TypeExpr ResolveAsTypeTerminal (IResolveContext ec, bool silent)
type == TypeManager.uint32_type && value >= 0x100000000;
}
+ static bool IsBuildInEqualityOperator (Type t)
+ {
+ return t == TypeManager.object_type || t == TypeManager.string_type ||
+ t == TypeManager.delegate_type || TypeManager.IsDelegateType (t);
+ }
+
private static bool IsTypeIntegral (Type type)
{
return type == TypeManager.uint64_type ||
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;
+ bool is_unsigned = IsUnsigned (l);
switch (oper){
case Operator.Multiply:
break;
default:
- throw new Exception ("This should not happen: Operator = "
- + oper.ToString ());
+ throw new InternalErrorException (oper.ToString ());
}
ig.Emit (opcode);
target.left = left.Clone (clonectx);
target.right = right.Clone (clonectx);
}
-
+
public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ return CreateExpressionTree (ec, null);
+ }
+
+ Expression CreateExpressionTree (EmitContext ec, MethodGroupExpr method)
{
string method_name;
+ bool lift_arg = false;
+
switch (oper) {
case Operator.Addition:
- if (ec.CheckState)
+ if (method == null && ec.CheckState)
method_name = "AddChecked";
else
method_name = "Add";
case Operator.BitwiseAnd:
method_name = "And";
break;
+ case Operator.Division:
+ method_name = "Divide";
+ break;
+ case Operator.Equality:
+ method_name = "Equal";
+ lift_arg = true;
+ break;
+ case Operator.ExclusiveOr:
+ method_name = "ExclusiveOr";
+ break;
+ case Operator.GreaterThan:
+ method_name = "GreaterThan";
+ lift_arg = true;
+ break;
+ case Operator.GreaterThanOrEqual:
+ method_name = "GreaterThanOrEqual";
+ lift_arg = true;
+ break;
+ case Operator.LessThan:
+ method_name = "LessThan";
+ break;
case Operator.LogicalAnd:
method_name = "AndAlso";
break;
+ case Operator.Inequality:
+ method_name = "NotEqual";
+ lift_arg = true;
+ break;
+ case Operator.RightShift:
+ method_name = "RightShift";
+ break;
case Operator.BitwiseOr:
method_name = "Or";
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);
}
}
return;
}
}
-
- //
- // Conversion to object
- //
- if (operand.Type != TypeManager.string_type) {
- Expression expr = Convert.ImplicitConversion (ec, operand, TypeManager.object_type, loc);
- if (expr == null) {
- Binary.Error_OperatorCannotBeApplied (loc, "+", TypeManager.string_type, operand.Type);
- return;
- }
- operand = expr;
- }
-
+
arguments.Add (new Argument (operand));
}
//
// User-defined conditional logical operator
+ //
public class ConditionalLogicalOperator : Expression {
Expression left, right;
bool is_and;
+ Expression op_true, op_false;
+ UserOperatorCall op;
+ LocalTemporary left_temp;
public ConditionalLogicalOperator (bool is_and, Expression left, Expression right, Type t, Location loc)
{
this.right = right;
this.is_and = is_and;
}
+
+ public override Expression CreateExpressionTree (EmitContext ec)
+ {
+ ArrayList args = new ArrayList (3);
+ args.Add (new Argument (left.CreateExpressionTree (ec)));
+ args.Add (new Argument (right.CreateExpressionTree (ec)));
+ args.Add (new Argument (op.Method.CreateExpressionTree (ec)));
+ return CreateExpressionFactoryCall (is_and ? "AndAlso" : "OrElse", args);
+ }
protected void Error19 ()
{
"declarations of operator true and operator false");
}
- Expression op_true, op_false, op;
- LocalTemporary left_temp;
-
public override Expression DoResolve (EmitContext ec)
{
MethodGroupExpr operator_group;
return null;
}
- op = new StaticCallExpr (method, arguments, loc);
+ op = new UserOperatorCall (operator_group, arguments, null, loc);
op_true = GetOperatorTrue (ec, left_temp, loc);
op_false = GetOperatorFalse (ec, left_temp, loc);
}
}
+ 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);
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);
}
- else
- sb = new StringBuilder ();
-
- sb.Append (TypeManager.CSharpSignature (mb));
- return sb.ToString ();
- }
- public override Expression CreateExpressionTree (EmitContext ec)
- {
- ArrayList args = new ArrayList (Arguments.Count + 3);
+ args = new ArrayList (Arguments.Count + 3);
if (mg.IsInstance)
args.Add (new Argument (mg.InstanceExpression.CreateExpressionTree (ec)));
else
- args.Add (new Argument (new NullConstant (loc).CreateExpressionTree (ec)));
+ args.Add (new Argument (new NullLiteral (loc).CreateExpressionTree (ec)));
args.Add (new Argument (mg.CreateExpressionTree (ec)));
foreach (Argument a in Arguments) {
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);
+ 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;
}
//
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 (t == TypeManager.decimal_type)
return new DecimalConstant (0, Location.Null);
if (TypeManager.IsEnumType (t))
- return new EnumConstant (Constantify (TypeManager.EnumToUnderlying (t)), t);
+ return new EnumConstant (Constantify (TypeManager.GetEnumUnderlyingType (t)), t);
return null;
}
return null;
}
+ if (TypeManager.activator_create_instance == null) {
+ Type activator_type = TypeManager.CoreLookupType ("System", "Activator", Kind.Class, true);
+ if (activator_type != null) {
+ TypeManager.activator_create_instance = TypeManager.GetPredefinedMethod (
+ activator_type, "CreateInstance", loc, Type.EmptyTypes);
+ }
+ }
+
is_type_parameter = true;
eclass = ExprClass.Value;
return this;
return true;
}
-
+
public override Expression CreateExpressionTree (EmitContext ec)
{
if (dimensions != 1) {
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
//
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));
+ }
}
}
}
}
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.
- eclass = ExprClass.Value;
- return this;
+
+ return DoResolveBase ();
}
}
internal class TypeOfMethod : Expression
{
- readonly MethodGroupExpr method;
- static MethodInfo get_type_from_handle;
-
- static TypeOfMethod ()
- {
- get_type_from_handle = typeof (MethodBase).GetMethod ("GetMethodFromHandle",
- new Type [] { TypeManager.runtime_method_handle_type });
- }
+ readonly MethodInfo method;
- public TypeOfMethod (MethodGroupExpr method)
+ public TypeOfMethod (MethodInfo method, Location loc)
{
this.method = method;
- loc = method.Location;
+ this.loc = loc;
}
public override Expression DoResolve (EmitContext ec)
{
+ if (TypeManager.methodbase_get_type_from_handle == null) {
+ Type t = TypeManager.CoreLookupType ("System.Reflection", "MethodBase", Kind.Class, true);
+ Type handle_type = TypeManager.CoreLookupType ("System", "RuntimeMethodHandle", Kind.Class, true);
+
+ if (t != null && handle_type != null)
+ TypeManager.methodbase_get_type_from_handle = TypeManager.GetPredefinedMethod (t,
+ "GetMethodFromHandle", loc, handle_type);
+ }
+
type = typeof (MethodBase);
eclass = ExprClass.Value;
return this;
public override void Emit (EmitContext ec)
{
- ec.ig.Emit (OpCodes.Ldtoken, (MethodInfo)method);
- ec.ig.Emit (OpCodes.Call, get_type_from_handle);
+ ec.ig.Emit (OpCodes.Ldtoken, method);
+ ec.ig.Emit (OpCodes.Call, TypeManager.methodbase_get_type_from_handle);
}
}
#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);
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)
{
#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;
}
+ 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);
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);
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;
}
}
- type = pi.PropertyType;
+ type = TypeManager.TypeToCoreType (pi.PropertyType);
if (type.IsPointer && !ec.InUnsafe)
UnsafeError (loc);
}
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);
}
}
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);
if (e == EmptyExpressionStatement.Instance)
initializers.RemoveAt (i--);
else
- initializers [i] = e;
+ initializers [i] = e;
}
type = typeof (CollectionOrObjectInitializers);
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