protected override Expression DoResolve(ResolveContext rc) { if (rc.HasSet(ResolveContext.Options.LockScope)) { rc.Report.Error(1996, loc, "The `await' operator cannot be used in the body of a lock statement"); } if (rc.IsUnsafe) { rc.Report.Error(4004, loc, "The `await' operator cannot be used in an unsafe context"); } var bc = (BlockContext)rc; stmt = new AwaitStatement(expr, loc); if (!stmt.Resolve(bc)) { return(null); } type = stmt.ResultType; eclass = ExprClass.Variable; return(this); }
public Expression CreateCallSiteBinder(ResolveContext ec, Arguments args) { Arguments binder_args = new Arguments(3); flags |= ec.HasSet(ResolveContext.Options.CheckedScope) ? CSharpBinderFlags.CheckedContext : 0; binder_args.Add(new Argument(new BinderFlags(flags, this))); binder_args.Add(new Argument(new TypeOf(type, loc))); binder_args.Add(new Argument(new TypeOf(ec.CurrentType, loc))); return(new Invocation(GetBinder("Convert", loc), binder_args)); }
public BlockContext(ResolveContext rc, ExplicitBlock block, TypeSpec returnType) : this(rc.MemberContext, block, returnType) { if (rc.IsUnsafe) { flags |= ResolveContext.Options.UnsafeScope; } if (rc.HasSet(ResolveContext.Options.CheckedScope)) { flags |= ResolveContext.Options.CheckedScope; } if (!rc.ConstantCheckState) { flags &= ~Options.ConstantCheckState; } if (rc.IsInProbingMode) { flags |= ResolveContext.Options.ProbingMode; } if (rc.HasSet(ResolveContext.Options.FieldInitializerScope)) { flags |= ResolveContext.Options.FieldInitializerScope; } if (rc.HasSet(ResolveContext.Options.ExpressionTreeConversion)) { flags |= ResolveContext.Options.ExpressionTreeConversion; } if (rc.HasSet(ResolveContext.Options.BaseInitializer)) { flags |= ResolveContext.Options.BaseInitializer; } }
public Expression CreateCallSiteBinder(ResolveContext ec, Arguments args) { Arguments binder_args = new Arguments(4); MemberAccess sle = new MemberAccess(new MemberAccess( new QualifiedAliasMember(QualifiedAliasMember.GlobalAlias, "System", loc), "Linq", loc), "Expressions", loc); var flags = ec.HasSet(ResolveContext.Options.CheckedScope) ? CSharpBinderFlags.CheckedContext : 0; binder_args.Add(new Argument(new BinderFlags(flags, this))); binder_args.Add(new Argument(new MemberAccess(new MemberAccess(sle, "ExpressionType", loc), name, loc))); binder_args.Add(new Argument(new TypeOf(ec.CurrentType, loc))); binder_args.Add(new Argument(new ImplicitlyTypedArrayCreation(args.CreateDynamicBinderArguments(ec), loc))); return(new Invocation(GetBinder("UnaryOperation", loc), binder_args)); }
/// <summary> /// Constant expression folder for binary operations. /// /// Returns null if the expression can not be folded. /// </summary> static public Constant BinaryFold (ResolveContext ec, Binary.Operator oper, Constant left, Constant right, Location loc) { Constant result = null; if (left is EmptyConstantCast) return BinaryFold (ec, oper, ((EmptyConstantCast)left).child, right, loc); if (left is SideEffectConstant) { result = BinaryFold (ec, oper, ((SideEffectConstant) left).value, right, loc); if (result == null) return null; return new SideEffectConstant (result, left, loc); } if (right is EmptyConstantCast) return BinaryFold (ec, oper, left, ((EmptyConstantCast)right).child, loc); if (right is SideEffectConstant) { result = BinaryFold (ec, oper, left, ((SideEffectConstant) right).value, loc); if (result == null) return null; return new SideEffectConstant (result, right, loc); } TypeSpec lt = left.Type; TypeSpec rt = right.Type; bool bool_res; if (lt.BuiltinType == BuiltinTypeSpec.Type.Bool && lt == rt) { bool lv = (bool) left.GetValue (); bool rv = (bool) right.GetValue (); switch (oper) { case Binary.Operator.BitwiseAnd: case Binary.Operator.LogicalAnd: return new BoolConstant (ec.BuiltinTypes, lv && rv, left.Location); case Binary.Operator.BitwiseOr: case Binary.Operator.LogicalOr: return new BoolConstant (ec.BuiltinTypes, lv || rv, left.Location); case Binary.Operator.ExclusiveOr: return new BoolConstant (ec.BuiltinTypes, lv ^ rv, left.Location); case Binary.Operator.Equality: return new BoolConstant (ec.BuiltinTypes, lv == rv, left.Location); case Binary.Operator.Inequality: return new BoolConstant (ec.BuiltinTypes, lv != rv, left.Location); } return null; } // // During an enum evaluation, none of the rules are valid // Not sure whether it is bug in csc or in documentation // if (ec.HasSet (ResolveContext.Options.EnumScope)){ if (left is EnumConstant) left = ((EnumConstant) left).Child; if (right is EnumConstant) right = ((EnumConstant) right).Child; } else if (left is EnumConstant && rt == lt) { switch (oper){ /// /// E operator |(E x, E y); /// E operator &(E x, E y); /// E operator ^(E x, E y); /// case Binary.Operator.BitwiseOr: case Binary.Operator.BitwiseAnd: case Binary.Operator.ExclusiveOr: result = BinaryFold (ec, oper, ((EnumConstant)left).Child, ((EnumConstant)right).Child, loc); if (result != null) result = result.Reduce (ec, lt); return result; /// /// U operator -(E x, E y); /// case Binary.Operator.Subtraction: result = BinaryFold (ec, oper, ((EnumConstant)left).Child, ((EnumConstant)right).Child, loc); if (result != null) result = result.Reduce (ec, EnumSpec.GetUnderlyingType (lt)); return result; /// /// 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); /// case Binary.Operator.Equality: case Binary.Operator.Inequality: case Binary.Operator.LessThan: case Binary.Operator.GreaterThan: case Binary.Operator.LessThanOrEqual: case Binary.Operator.GreaterThanOrEqual: return BinaryFold(ec, oper, ((EnumConstant)left).Child, ((EnumConstant)right).Child, loc); } return null; } switch (oper){ case Binary.Operator.BitwiseOr: // // bool? operator |(bool? x, bool? y); // if ((lt.BuiltinType == BuiltinTypeSpec.Type.Bool && right is NullLiteral) || (rt.BuiltinType == BuiltinTypeSpec.Type.Bool && left is NullLiteral)) { var b = new Binary (oper, left, right).ResolveOperator (ec); // false | null => null // null | false => null if ((right is NullLiteral && left.IsDefaultValue) || (left is NullLiteral && right.IsDefaultValue)) return Nullable.LiftedNull.CreateFromExpression (ec, b); // true | null => true // null | true => true return ReducedExpression.Create (new BoolConstant (ec.BuiltinTypes, true, loc), b); } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; if (left is IntConstant){ int res = ((IntConstant) left).Value | ((IntConstant) right).Value; return new IntConstant (ec.BuiltinTypes, res, left.Location); } if (left is UIntConstant){ uint res = ((UIntConstant)left).Value | ((UIntConstant)right).Value; return new UIntConstant (ec.BuiltinTypes, res, left.Location); } if (left is LongConstant){ long res = ((LongConstant)left).Value | ((LongConstant)right).Value; return new LongConstant (ec.BuiltinTypes, res, left.Location); } if (left is ULongConstant){ ulong res = ((ULongConstant)left).Value | ((ULongConstant)right).Value; return new ULongConstant (ec.BuiltinTypes, res, left.Location); } break; case Binary.Operator.BitwiseAnd: // // bool? operator &(bool? x, bool? y); // if ((lt.BuiltinType == BuiltinTypeSpec.Type.Bool && right is NullLiteral) || (rt.BuiltinType == BuiltinTypeSpec.Type.Bool && left is NullLiteral)) { var b = new Binary (oper, left, right).ResolveOperator (ec); // false & null => false // null & false => false if ((right is NullLiteral && left.IsDefaultValue) || (left is NullLiteral && right.IsDefaultValue)) return ReducedExpression.Create (new BoolConstant (ec.BuiltinTypes, false, loc), b); // true & null => null // null & true => null return Nullable.LiftedNull.CreateFromExpression (ec, b); } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; /// /// int operator &(int x, int y); /// uint operator &(uint x, uint y); /// long operator &(long x, long y); /// ulong operator &(ulong x, ulong y); /// if (left is IntConstant){ int res = ((IntConstant) left).Value & ((IntConstant) right).Value; return new IntConstant (ec.BuiltinTypes, res, left.Location); } if (left is UIntConstant){ uint res = ((UIntConstant)left).Value & ((UIntConstant)right).Value; return new UIntConstant (ec.BuiltinTypes, res, left.Location); } if (left is LongConstant){ long res = ((LongConstant)left).Value & ((LongConstant)right).Value; return new LongConstant (ec.BuiltinTypes, res, left.Location); } if (left is ULongConstant){ ulong res = ((ULongConstant)left).Value & ((ULongConstant)right).Value; return new ULongConstant (ec.BuiltinTypes, res, left.Location); } break; case Binary.Operator.ExclusiveOr: if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; if (left is IntConstant){ int res = ((IntConstant) left).Value ^ ((IntConstant) right).Value; return new IntConstant (ec.BuiltinTypes, res, left.Location); } if (left is UIntConstant){ uint res = ((UIntConstant)left).Value ^ ((UIntConstant)right).Value; return new UIntConstant (ec.BuiltinTypes, res, left.Location); } if (left is LongConstant){ long res = ((LongConstant)left).Value ^ ((LongConstant)right).Value; return new LongConstant (ec.BuiltinTypes, res, left.Location); } if (left is ULongConstant){ ulong res = ((ULongConstant)left).Value ^ ((ULongConstant)right).Value; return new ULongConstant (ec.BuiltinTypes, res, left.Location); } break; case Binary.Operator.Addition: // // If both sides are strings, then concatenate // // string operator + (string x, string y) // if (lt.BuiltinType == BuiltinTypeSpec.Type.String || rt.BuiltinType == BuiltinTypeSpec.Type.String){ if (lt == rt) return new StringConstant (ec.BuiltinTypes, (string)left.GetValue () + (string)right.GetValue (), left.Location); if (lt == InternalType.NullLiteral || left.IsNull) return new StringConstant (ec.BuiltinTypes, "" + right.GetValue (), left.Location); if (rt == InternalType.NullLiteral || right.IsNull) return new StringConstant (ec.BuiltinTypes, left.GetValue () + "", left.Location); return null; } // // string operator + (string x, object y) // if (lt == InternalType.NullLiteral) { if (rt.BuiltinType == BuiltinTypeSpec.Type.Object) return new StringConstant (ec.BuiltinTypes, "" + right.GetValue (), left.Location); if (lt == rt) { ec.Report.Error (34, loc, "Operator `{0}' is ambiguous on operands of type `{1}' and `{2}'", "+", lt.GetSignatureForError (), rt.GetSignatureForError ()); return null; } return right; } // // string operator + (object x, string y) // if (rt == InternalType.NullLiteral) { if (lt.BuiltinType == BuiltinTypeSpec.Type.Object) return new StringConstant (ec.BuiltinTypes, right.GetValue () + "", left.Location); return left; } // // handle "E operator + (E x, U y)" // handle "E operator + (Y y, E x)" // EnumConstant lc = left as EnumConstant; EnumConstant rc = right as EnumConstant; if (lc != null || rc != null){ if (lc == null) { lc = rc; lt = lc.Type; right = left; } // U has to be implicitly convetible to E.base right = right.ConvertImplicitly (lc.Child.Type); if (right == null) return null; result = BinaryFold (ec, oper, lc.Child, right, loc); if (result == null) return null; result = result.Reduce (ec, lt); if (result == null || lt.IsEnum) return result; return new EnumConstant (result, lt); } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; try { if (left is DoubleConstant){ double res; if (ec.ConstantCheckState) res = checked (((DoubleConstant) left).Value + ((DoubleConstant) right).Value); else res = unchecked (((DoubleConstant) left).Value + ((DoubleConstant) right).Value); return new DoubleConstant (ec.BuiltinTypes, res, left.Location); } if (left is FloatConstant){ double a, b, res; a = ((FloatConstant) left).DoubleValue; b = ((FloatConstant) right).DoubleValue; if (ec.ConstantCheckState) res = checked (a + b); else res = unchecked (a + b); result = new FloatConstant (ec.BuiltinTypes, res, left.Location); } else if (left is ULongConstant){ ulong res; if (ec.ConstantCheckState) res = checked (((ULongConstant) left).Value + ((ULongConstant) right).Value); else res = unchecked (((ULongConstant) left).Value + ((ULongConstant) right).Value); result = new ULongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is LongConstant){ long res; if (ec.ConstantCheckState) res = checked (((LongConstant) left).Value + ((LongConstant) right).Value); else res = unchecked (((LongConstant) left).Value + ((LongConstant) right).Value); result = new LongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is UIntConstant){ uint res; if (ec.ConstantCheckState) res = checked (((UIntConstant) left).Value + ((UIntConstant) right).Value); else res = unchecked (((UIntConstant) left).Value + ((UIntConstant) right).Value); result = new UIntConstant (ec.BuiltinTypes, res, left.Location); } else if (left is IntConstant){ int res; if (ec.ConstantCheckState) res = checked (((IntConstant) left).Value + ((IntConstant) right).Value); else res = unchecked (((IntConstant) left).Value + ((IntConstant) right).Value); result = new IntConstant (ec.BuiltinTypes, res, left.Location); } else if (left is DecimalConstant) { decimal res; if (ec.ConstantCheckState) res = checked (((DecimalConstant) left).Value + ((DecimalConstant) right).Value); else res = unchecked (((DecimalConstant) left).Value + ((DecimalConstant) right).Value); result = new DecimalConstant (ec.BuiltinTypes, res, left.Location); } } catch (OverflowException){ Error_CompileTimeOverflow (ec, loc); } return result; case Binary.Operator.Subtraction: // // handle "E operator - (E x, U y)" // handle "E operator - (Y y, E x)" // lc = left as EnumConstant; rc = right as EnumConstant; if (lc != null || rc != null){ if (lc == null) { lc = rc; lt = lc.Type; right = left; } // U has to be implicitly convetible to E.base right = right.ConvertImplicitly (lc.Child.Type); if (right == null) return null; result = BinaryFold (ec, oper, lc.Child, right, loc); if (result == null) return null; result = result.Reduce (ec, lt); if (result == null) return null; return new EnumConstant (result, lt); } if (left is NullLiteral && right is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; try { if (left is DoubleConstant){ double res; if (ec.ConstantCheckState) res = checked (((DoubleConstant) left).Value - ((DoubleConstant) right).Value); else res = unchecked (((DoubleConstant) left).Value - ((DoubleConstant) right).Value); result = new DoubleConstant (ec.BuiltinTypes, res, left.Location); } else if (left is FloatConstant){ double a, b, res; a = ((FloatConstant) left).DoubleValue; b = ((FloatConstant) right).DoubleValue; if (ec.ConstantCheckState) res = checked (a - b); else res = unchecked (a - b); result = new FloatConstant (ec.BuiltinTypes, res, left.Location); } else if (left is ULongConstant){ ulong res; if (ec.ConstantCheckState) res = checked (((ULongConstant) left).Value - ((ULongConstant) right).Value); else res = unchecked (((ULongConstant) left).Value - ((ULongConstant) right).Value); result = new ULongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is LongConstant){ long res; if (ec.ConstantCheckState) res = checked (((LongConstant) left).Value - ((LongConstant) right).Value); else res = unchecked (((LongConstant) left).Value - ((LongConstant) right).Value); result = new LongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is UIntConstant){ uint res; if (ec.ConstantCheckState) res = checked (((UIntConstant) left).Value - ((UIntConstant) right).Value); else res = unchecked (((UIntConstant) left).Value - ((UIntConstant) right).Value); result = new UIntConstant (ec.BuiltinTypes, res, left.Location); } else if (left is IntConstant){ int res; if (ec.ConstantCheckState) res = checked (((IntConstant) left).Value - ((IntConstant) right).Value); else res = unchecked (((IntConstant) left).Value - ((IntConstant) right).Value); result = new IntConstant (ec.BuiltinTypes, res, left.Location); } else if (left is DecimalConstant) { decimal res; if (ec.ConstantCheckState) res = checked (((DecimalConstant) left).Value - ((DecimalConstant) right).Value); else res = unchecked (((DecimalConstant) left).Value - ((DecimalConstant) right).Value); return new DecimalConstant (ec.BuiltinTypes, res, left.Location); } else { throw new Exception ( "Unexepected subtraction input: " + left); } } catch (OverflowException){ Error_CompileTimeOverflow (ec, loc); } return result; case Binary.Operator.Multiply: if (left is NullLiteral && right is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; try { if (left is DoubleConstant){ double res; if (ec.ConstantCheckState) res = checked (((DoubleConstant) left).Value * ((DoubleConstant) right).Value); else res = unchecked (((DoubleConstant) left).Value * ((DoubleConstant) right).Value); return new DoubleConstant (ec.BuiltinTypes, res, left.Location); } else if (left is FloatConstant){ double a, b, res; a = ((FloatConstant) left).DoubleValue; b = ((FloatConstant) right).DoubleValue; if (ec.ConstantCheckState) res = checked (a * b); else res = unchecked (a * b); return new FloatConstant (ec.BuiltinTypes, res, left.Location); } else if (left is ULongConstant){ ulong res; if (ec.ConstantCheckState) res = checked (((ULongConstant) left).Value * ((ULongConstant) right).Value); else res = unchecked (((ULongConstant) left).Value * ((ULongConstant) right).Value); return new ULongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is LongConstant){ long res; if (ec.ConstantCheckState) res = checked (((LongConstant) left).Value * ((LongConstant) right).Value); else res = unchecked (((LongConstant) left).Value * ((LongConstant) right).Value); return new LongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is UIntConstant){ uint res; if (ec.ConstantCheckState) res = checked (((UIntConstant) left).Value * ((UIntConstant) right).Value); else res = unchecked (((UIntConstant) left).Value * ((UIntConstant) right).Value); return new UIntConstant (ec.BuiltinTypes, res, left.Location); } else if (left is IntConstant){ int res; if (ec.ConstantCheckState) res = checked (((IntConstant) left).Value * ((IntConstant) right).Value); else res = unchecked (((IntConstant) left).Value * ((IntConstant) right).Value); return new IntConstant (ec.BuiltinTypes, res, left.Location); } else if (left is DecimalConstant) { decimal res; if (ec.ConstantCheckState) res = checked (((DecimalConstant) left).Value * ((DecimalConstant) right).Value); else res = unchecked (((DecimalConstant) left).Value * ((DecimalConstant) right).Value); return new DecimalConstant (ec.BuiltinTypes, res, left.Location); } else { throw new Exception ( "Unexepected multiply input: " + left); } } catch (OverflowException){ Error_CompileTimeOverflow (ec, loc); } break; case Binary.Operator.Division: if (left is NullLiteral && right is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; try { if (left is DoubleConstant){ double res; if (ec.ConstantCheckState) res = checked (((DoubleConstant) left).Value / ((DoubleConstant) right).Value); else res = unchecked (((DoubleConstant) left).Value / ((DoubleConstant) right).Value); return new DoubleConstant (ec.BuiltinTypes, res, left.Location); } else if (left is FloatConstant){ double a, b, res; a = ((FloatConstant) left).DoubleValue; b = ((FloatConstant) right).DoubleValue; if (ec.ConstantCheckState) res = checked (a / b); else res = unchecked (a / b); return new FloatConstant (ec.BuiltinTypes, res, left.Location); } else if (left is ULongConstant){ ulong res; if (ec.ConstantCheckState) res = checked (((ULongConstant) left).Value / ((ULongConstant) right).Value); else res = unchecked (((ULongConstant) left).Value / ((ULongConstant) right).Value); return new ULongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is LongConstant){ long res; if (ec.ConstantCheckState) res = checked (((LongConstant) left).Value / ((LongConstant) right).Value); else res = unchecked (((LongConstant) left).Value / ((LongConstant) right).Value); return new LongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is UIntConstant){ uint res; if (ec.ConstantCheckState) res = checked (((UIntConstant) left).Value / ((UIntConstant) right).Value); else res = unchecked (((UIntConstant) left).Value / ((UIntConstant) right).Value); return new UIntConstant (ec.BuiltinTypes, res, left.Location); } else if (left is IntConstant){ int res; if (ec.ConstantCheckState) res = checked (((IntConstant) left).Value / ((IntConstant) right).Value); else res = unchecked (((IntConstant) left).Value / ((IntConstant) right).Value); return new IntConstant (ec.BuiltinTypes, res, left.Location); } else if (left is DecimalConstant) { decimal res; if (ec.ConstantCheckState) res = checked (((DecimalConstant) left).Value / ((DecimalConstant) right).Value); else res = unchecked (((DecimalConstant) left).Value / ((DecimalConstant) right).Value); return new DecimalConstant (ec.BuiltinTypes, res, left.Location); } else { throw new Exception ( "Unexepected division input: " + left); } } catch (OverflowException){ Error_CompileTimeOverflow (ec, loc); } catch (DivideByZeroException) { ec.Report.Error (20, loc, "Division by constant zero"); } break; case Binary.Operator.Modulus: if (left is NullLiteral && right is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; try { if (left is DoubleConstant){ double res; if (ec.ConstantCheckState) res = checked (((DoubleConstant) left).Value % ((DoubleConstant) right).Value); else res = unchecked (((DoubleConstant) left).Value % ((DoubleConstant) right).Value); return new DoubleConstant (ec.BuiltinTypes, res, left.Location); } else if (left is FloatConstant){ double a, b, res; a = ((FloatConstant) left).DoubleValue; b = ((FloatConstant) right).DoubleValue; if (ec.ConstantCheckState) res = checked (a % b); else res = unchecked (a % b); return new FloatConstant (ec.BuiltinTypes, res, left.Location); } else if (left is ULongConstant){ ulong res; if (ec.ConstantCheckState) res = checked (((ULongConstant) left).Value % ((ULongConstant) right).Value); else res = unchecked (((ULongConstant) left).Value % ((ULongConstant) right).Value); return new ULongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is LongConstant){ long res; if (ec.ConstantCheckState) res = checked (((LongConstant) left).Value % ((LongConstant) right).Value); else res = unchecked (((LongConstant) left).Value % ((LongConstant) right).Value); return new LongConstant (ec.BuiltinTypes, res, left.Location); } else if (left is UIntConstant){ uint res; if (ec.ConstantCheckState) res = checked (((UIntConstant) left).Value % ((UIntConstant) right).Value); else res = unchecked (((UIntConstant) left).Value % ((UIntConstant) right).Value); return new UIntConstant (ec.BuiltinTypes, res, left.Location); } else if (left is IntConstant){ int res; if (ec.ConstantCheckState) res = checked (((IntConstant) left).Value % ((IntConstant) right).Value); else res = unchecked (((IntConstant) left).Value % ((IntConstant) right).Value); return new IntConstant (ec.BuiltinTypes, res, left.Location); } if (left is DecimalConstant) { decimal res; if (ec.ConstantCheckState) res = checked (((DecimalConstant) left).Value % ((DecimalConstant) right).Value); else res = unchecked (((DecimalConstant) left).Value % ((DecimalConstant) right).Value); return new DecimalConstant (ec.BuiltinTypes, res, left.Location); } throw new Exception ( "Unexepected modulus input: " + left); } catch (DivideByZeroException){ ec.Report.Error (20, loc, "Division by constant zero"); } catch (OverflowException){ Error_CompileTimeOverflow (ec, loc); } break; // // There is no overflow checking on left shift // case Binary.Operator.LeftShift: if (left is NullLiteral && right is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } IntConstant ic = right.ConvertImplicitly (ec.BuiltinTypes.Int) as IntConstant; if (ic == null){ return null; } int lshift_val = ic.Value; switch (left.Type.BuiltinType) { case BuiltinTypeSpec.Type.ULong: return new ULongConstant (ec.BuiltinTypes, ((ULongConstant) left).Value << lshift_val, left.Location); case BuiltinTypeSpec.Type.Long: return new LongConstant (ec.BuiltinTypes, ((LongConstant) left).Value << lshift_val, left.Location); case BuiltinTypeSpec.Type.UInt: return new UIntConstant (ec.BuiltinTypes, ((UIntConstant) left).Value << lshift_val, left.Location); } // null << value => null if (left is NullLiteral) return (Constant) new Binary (oper, left, right).ResolveOperator (ec); left = left.ConvertImplicitly (ec.BuiltinTypes.Int); if (left.Type.BuiltinType == BuiltinTypeSpec.Type.Int) return new IntConstant (ec.BuiltinTypes, ((IntConstant) left).Value << lshift_val, left.Location); return null; // // There is no overflow checking on right shift // case Binary.Operator.RightShift: if (left is NullLiteral && right is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } IntConstant sic = right.ConvertImplicitly (ec.BuiltinTypes.Int) as IntConstant; if (sic == null){ return null; } int rshift_val = sic.Value; switch (left.Type.BuiltinType) { case BuiltinTypeSpec.Type.ULong: return new ULongConstant (ec.BuiltinTypes, ((ULongConstant) left).Value >> rshift_val, left.Location); case BuiltinTypeSpec.Type.Long: return new LongConstant (ec.BuiltinTypes, ((LongConstant) left).Value >> rshift_val, left.Location); case BuiltinTypeSpec.Type.UInt: return new UIntConstant (ec.BuiltinTypes, ((UIntConstant) left).Value >> rshift_val, left.Location); } // null >> value => null if (left is NullLiteral) return (Constant) new Binary (oper, left, right).ResolveOperator (ec); left = left.ConvertImplicitly (ec.BuiltinTypes.Int); if (left.Type.BuiltinType == BuiltinTypeSpec.Type.Int) return new IntConstant (ec.BuiltinTypes, ((IntConstant) left).Value >> rshift_val, left.Location); return null; case Binary.Operator.Equality: if (TypeSpec.IsReferenceType (lt) && TypeSpec.IsReferenceType (rt) || (left is Nullable.LiftedNull && right.IsNull) || (right is Nullable.LiftedNull && left.IsNull)) { if (left.IsNull || right.IsNull) { return ReducedExpression.Create ( new BoolConstant (ec.BuiltinTypes, left.IsNull == right.IsNull, left.Location), new Binary (oper, left, right)); } if (left is StringConstant && right is StringConstant) return new BoolConstant (ec.BuiltinTypes, ((StringConstant) left).Value == ((StringConstant) right).Value, left.Location); return null; } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; bool_res = false; if (left is DoubleConstant) bool_res = ((DoubleConstant) left).Value == ((DoubleConstant) right).Value; else if (left is FloatConstant) bool_res = ((FloatConstant) left).DoubleValue == ((FloatConstant) right).DoubleValue; else if (left is ULongConstant) bool_res = ((ULongConstant) left).Value == ((ULongConstant) right).Value; else if (left is LongConstant) bool_res = ((LongConstant) left).Value == ((LongConstant) right).Value; else if (left is UIntConstant) bool_res = ((UIntConstant) left).Value == ((UIntConstant) right).Value; else if (left is IntConstant) bool_res = ((IntConstant) left).Value == ((IntConstant) right).Value; else return null; return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location); case Binary.Operator.Inequality: if (TypeSpec.IsReferenceType (lt) && TypeSpec.IsReferenceType (rt) || (left is Nullable.LiftedNull && right.IsNull) || (right is Nullable.LiftedNull && left.IsNull)) { if (left.IsNull || right.IsNull) { return ReducedExpression.Create ( new BoolConstant (ec.BuiltinTypes, left.IsNull != right.IsNull, left.Location), new Binary (oper, left, right)); } if (left is StringConstant && right is StringConstant) return new BoolConstant (ec.BuiltinTypes, ((StringConstant) left).Value != ((StringConstant) right).Value, left.Location); return null; } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; bool_res = false; if (left is DoubleConstant) bool_res = ((DoubleConstant) left).Value != ((DoubleConstant) right).Value; else if (left is FloatConstant) bool_res = ((FloatConstant) left).DoubleValue != ((FloatConstant) right).DoubleValue; else if (left is ULongConstant) bool_res = ((ULongConstant) left).Value != ((ULongConstant) right).Value; else if (left is LongConstant) bool_res = ((LongConstant) left).Value != ((LongConstant) right).Value; else if (left is UIntConstant) bool_res = ((UIntConstant) left).Value != ((UIntConstant) right).Value; else if (left is IntConstant) bool_res = ((IntConstant) left).Value != ((IntConstant) right).Value; else return null; return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location); case Binary.Operator.LessThan: if (right is NullLiteral) { if (left is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; bool_res = false; if (left is DoubleConstant) bool_res = ((DoubleConstant) left).Value < ((DoubleConstant) right).Value; else if (left is FloatConstant) bool_res = ((FloatConstant) left).DoubleValue < ((FloatConstant) right).DoubleValue; else if (left is ULongConstant) bool_res = ((ULongConstant) left).Value < ((ULongConstant) right).Value; else if (left is LongConstant) bool_res = ((LongConstant) left).Value < ((LongConstant) right).Value; else if (left is UIntConstant) bool_res = ((UIntConstant) left).Value < ((UIntConstant) right).Value; else if (left is IntConstant) bool_res = ((IntConstant) left).Value < ((IntConstant) right).Value; else return null; return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location); case Binary.Operator.GreaterThan: if (right is NullLiteral) { if (left is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; bool_res = false; if (left is DoubleConstant) bool_res = ((DoubleConstant) left).Value > ((DoubleConstant) right).Value; else if (left is FloatConstant) bool_res = ((FloatConstant) left).DoubleValue > ((FloatConstant) right).DoubleValue; else if (left is ULongConstant) bool_res = ((ULongConstant) left).Value > ((ULongConstant) right).Value; else if (left is LongConstant) bool_res = ((LongConstant) left).Value > ((LongConstant) right).Value; else if (left is UIntConstant) bool_res = ((UIntConstant) left).Value > ((UIntConstant) right).Value; else if (left is IntConstant) bool_res = ((IntConstant) left).Value > ((IntConstant) right).Value; else return null; return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location); case Binary.Operator.GreaterThanOrEqual: if (right is NullLiteral) { if (left is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; bool_res = false; if (left is DoubleConstant) bool_res = ((DoubleConstant) left).Value >= ((DoubleConstant) right).Value; else if (left is FloatConstant) bool_res = ((FloatConstant) left).DoubleValue >= ((FloatConstant) right).DoubleValue; else if (left is ULongConstant) bool_res = ((ULongConstant) left).Value >= ((ULongConstant) right).Value; else if (left is LongConstant) bool_res = ((LongConstant) left).Value >= ((LongConstant) right).Value; else if (left is UIntConstant) bool_res = ((UIntConstant) left).Value >= ((UIntConstant) right).Value; else if (left is IntConstant) bool_res = ((IntConstant) left).Value >= ((IntConstant) right).Value; else return null; return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location); case Binary.Operator.LessThanOrEqual: if (right is NullLiteral) { if (left is NullLiteral) { var lifted_int = new Nullable.NullableType (ec.BuiltinTypes.Int, loc); lifted_int.ResolveAsType (ec); return (Constant) new Binary (oper, lifted_int, right).ResolveOperator (ec); } } if (!DoBinaryNumericPromotions (ec, ref left, ref right)) return null; bool_res = false; if (left is DoubleConstant) bool_res = ((DoubleConstant) left).Value <= ((DoubleConstant) right).Value; else if (left is FloatConstant) bool_res = ((FloatConstant) left).DoubleValue <= ((FloatConstant) right).DoubleValue; else if (left is ULongConstant) bool_res = ((ULongConstant) left).Value <= ((ULongConstant) right).Value; else if (left is LongConstant) bool_res = ((LongConstant) left).Value <= ((LongConstant) right).Value; else if (left is UIntConstant) bool_res = ((UIntConstant) left).Value <= ((UIntConstant) right).Value; else if (left is IntConstant) bool_res = ((IntConstant) left).Value <= ((IntConstant) right).Value; else return null; return new BoolConstant (ec.BuiltinTypes, bool_res, left.Location); } return null; }
protected override Expression DoResolve(ResolveContext ec) { right = right.Resolve(ec); if (right == null) { return(null); } MemberAccess ma = target as MemberAccess; using (ec.Set(ResolveContext.Options.CompoundAssignmentScope)) { target = target.Resolve(ec); } if (target == null) { return(null); } if (target is MethodGroupExpr) { ec.Report.Error(1656, loc, "Cannot assign to `{0}' because it is a `{1}'", ((MethodGroupExpr)target).Name, target.ExprClassName); return(null); } var event_expr = target as EventExpr; if (event_expr != null) { source = Convert.ImplicitConversionRequired(ec, right, target.Type, loc); if (source == null) { return(null); } Expression rside; if (op == Binary.Operator.Addition) { rside = EmptyExpression.EventAddition; } else if (op == Binary.Operator.Subtraction) { rside = EmptyExpression.EventSubtraction; } else { rside = null; } target = target.ResolveLValue(ec, rside); if (target == null) { return(null); } eclass = ExprClass.Value; type = event_expr.Operator.ReturnType; return(this); } // // Only now we can decouple the original source/target // into a tree, to guarantee that we do not have side // effects. // if (left == null) { left = new TargetExpression(target); } source = new Binary(op, left, right, true); if (target is DynamicMemberAssignable) { Arguments targs = ((DynamicMemberAssignable)target).Arguments; source = source.Resolve(ec); Arguments args = new Arguments(targs.Count + 1); args.AddRange(targs); args.Add(new Argument(source)); var binder_flags = CSharpBinderFlags.ValueFromCompoundAssignment; // // Compound assignment does target conversion using additional method // call, set checked context as the binary operation can overflow // if (ec.HasSet(ResolveContext.Options.CheckedScope)) { binder_flags |= CSharpBinderFlags.CheckedContext; } if (target is DynamicMemberBinder) { source = new DynamicMemberBinder(ma.Name, binder_flags, args, loc).Resolve(ec); // Handles possible event addition/subtraction if (op == Binary.Operator.Addition || op == Binary.Operator.Subtraction) { args = new Arguments(targs.Count + 1); args.AddRange(targs); args.Add(new Argument(right)); string method_prefix = op == Binary.Operator.Addition ? Event.AEventAccessor.AddPrefix : Event.AEventAccessor.RemovePrefix; var invoke = DynamicInvocation.CreateSpecialNameInvoke( new MemberAccess(right, method_prefix + ma.Name, loc), args, loc).Resolve(ec); args = new Arguments(targs.Count); args.AddRange(targs); source = new DynamicEventCompoundAssign(ma.Name, args, (ExpressionStatement)source, (ExpressionStatement)invoke, loc).Resolve(ec); } } else { source = new DynamicIndexBinder(binder_flags, args, loc).Resolve(ec); } return(source); } return(base.DoResolve(ec)); }
public Expression CreateCallSiteBinder (ResolveContext ec, Arguments args) { Arguments binder_args = new Arguments (4); MemberAccess sle = new MemberAccess (new MemberAccess ( new QualifiedAliasMember (QualifiedAliasMember.GlobalAlias, "System", loc), "Linq", loc), "Expressions", loc); var flags = ec.HasSet (ResolveContext.Options.CheckedScope) ? CSharpBinderFlags.CheckedContext : 0; binder_args.Add (new Argument (new BinderFlags (flags, this))); binder_args.Add (new Argument (new MemberAccess (new MemberAccess (sle, "ExpressionType", loc), name, loc))); binder_args.Add (new Argument (new TypeOf (ec.CurrentType, loc))); binder_args.Add (new Argument (new ImplicitlyTypedArrayCreation (args.CreateDynamicBinderArguments (ec), loc))); return new Invocation (GetBinder ("UnaryOperation", loc), binder_args); }
public Expression CreateCallSiteBinder (ResolveContext ec, Arguments args) { Arguments binder_args = new Arguments (3); flags |= ec.HasSet (ResolveContext.Options.CheckedScope) ? CSharpBinderFlags.CheckedContext : 0; binder_args.Add (new Argument (new BinderFlags (flags, this))); binder_args.Add (new Argument (new TypeOf (type, loc))); binder_args.Add (new Argument (new TypeOf (ec.CurrentType, loc))); return new Invocation (GetBinder ("Convert", loc), binder_args); }
public BlockContext (ResolveContext rc, ExplicitBlock block, TypeSpec returnType) : this (rc.MemberContext, block, returnType) { if (rc.IsUnsafe) flags |= ResolveContext.Options.UnsafeScope; if (rc.HasSet (ResolveContext.Options.CheckedScope)) flags |= ResolveContext.Options.CheckedScope; if (!rc.ConstantCheckState) flags &= ~Options.ConstantCheckState; if (rc.IsInProbingMode) flags |= ResolveContext.Options.ProbingMode; if (rc.HasSet (ResolveContext.Options.FieldInitializerScope)) flags |= ResolveContext.Options.FieldInitializerScope; if (rc.HasSet (ResolveContext.Options.ExpressionTreeConversion)) flags |= ResolveContext.Options.ExpressionTreeConversion; if (rc.HasSet (ResolveContext.Options.BaseInitializer)) flags |= ResolveContext.Options.BaseInitializer; }
protected override Expression DoResolve(ResolveContext ec) { constructor_method = Delegate.GetConstructor(type); var invoke_method = Delegate.GetInvokeMethod(type); if (!ec.HasSet(ResolveContext.Options.ConditionalAccessReceiver)) { if (method_group.HasConditionalAccess()) { conditional_access_receiver = true; ec.Set(ResolveContext.Options.ConditionalAccessReceiver); } } Arguments arguments = CreateDelegateMethodArguments(ec, invoke_method.Parameters, invoke_method.Parameters.Types, loc); method_group = method_group.OverloadResolve(ec, ref arguments, this, OverloadResolver.Restrictions.CovariantDelegate); if (conditional_access_receiver) { ec.With(ResolveContext.Options.ConditionalAccessReceiver, false); } if (method_group == null) { return(null); } var delegate_method = method_group.BestCandidate; if (delegate_method.DeclaringType.IsNullableType) { ec.Report.Error(1728, loc, "Cannot create delegate from method `{0}' because it is a member of System.Nullable<T> type", delegate_method.GetSignatureForError()); return(null); } if (!AllowSpecialMethodsInvocation) { Invocation.IsSpecialMethodInvocation(ec, delegate_method, loc); } ExtensionMethodGroupExpr emg = method_group as ExtensionMethodGroupExpr; if (emg != null) { method_group.InstanceExpression = emg.ExtensionExpression; TypeSpec e_type = emg.ExtensionExpression.Type; if (TypeSpec.IsValueType(e_type)) { ec.Report.Error(1113, loc, "Extension method `{0}' of value type `{1}' cannot be used to create delegates", delegate_method.GetSignatureForError(), e_type.GetSignatureForError()); } } TypeSpec rt = method_group.BestCandidateReturnType; if (rt.BuiltinType == BuiltinTypeSpec.Type.Dynamic) { rt = ec.BuiltinTypes.Object; } if (!Delegate.IsTypeCovariant(ec, rt, invoke_method.ReturnType)) { Expression ret_expr = new TypeExpression(delegate_method.ReturnType, loc); Error_ConversionFailed(ec, delegate_method, ret_expr); } if (method_group.IsConditionallyExcluded) { ec.Report.SymbolRelatedToPreviousError(delegate_method); MethodOrOperator m = delegate_method.MemberDefinition as MethodOrOperator; if (m != null && m.IsPartialDefinition) { ec.Report.Error(762, loc, "Cannot create delegate from partial method declaration `{0}'", delegate_method.GetSignatureForError()); } else { ec.Report.Error(1618, loc, "Cannot create delegate with `{0}' because it has a Conditional attribute", TypeManager.CSharpSignature(delegate_method)); } } var expr = method_group.InstanceExpression; if (expr != null && (expr.Type.IsGenericParameter || !TypeSpec.IsReferenceType(expr.Type))) { method_group.InstanceExpression = new BoxedCast(expr, ec.BuiltinTypes.Object); } eclass = ExprClass.Value; return(this); }
protected override Expression DoResolve (ResolveContext ec) { constructor_method = Delegate.GetConstructor (type); var invoke_method = Delegate.GetInvokeMethod (type); if (!ec.HasSet (ResolveContext.Options.ConditionalAccessReceiver)) { if (method_group.HasConditionalAccess ()) { conditional_access_receiver = true; ec.Set (ResolveContext.Options.ConditionalAccessReceiver); } } Arguments arguments = CreateDelegateMethodArguments (ec, invoke_method.Parameters, invoke_method.Parameters.Types, loc); method_group = method_group.OverloadResolve (ec, ref arguments, this, OverloadResolver.Restrictions.CovariantDelegate); if (conditional_access_receiver) ec.With (ResolveContext.Options.ConditionalAccessReceiver, false); if (method_group == null) return null; var delegate_method = method_group.BestCandidate; if (delegate_method.DeclaringType.IsNullableType) { ec.Report.Error (1728, loc, "Cannot create delegate from method `{0}' because it is a member of System.Nullable<T> type", delegate_method.GetSignatureForError ()); return null; } if (!AllowSpecialMethodsInvocation) Invocation.IsSpecialMethodInvocation (ec, delegate_method, loc); ExtensionMethodGroupExpr emg = method_group as ExtensionMethodGroupExpr; if (emg != null) { method_group.InstanceExpression = emg.ExtensionExpression; TypeSpec e_type = emg.ExtensionExpression.Type; if (TypeSpec.IsValueType (e_type)) { ec.Report.Error (1113, loc, "Extension method `{0}' of value type `{1}' cannot be used to create delegates", delegate_method.GetSignatureForError (), e_type.GetSignatureForError ()); } } TypeSpec rt = method_group.BestCandidateReturnType; if (rt.BuiltinType == BuiltinTypeSpec.Type.Dynamic) rt = ec.BuiltinTypes.Object; if (!Delegate.IsTypeCovariant (ec, rt, invoke_method.ReturnType)) { Expression ret_expr = new TypeExpression (delegate_method.ReturnType, loc); Error_ConversionFailed (ec, delegate_method, ret_expr); } if (method_group.IsConditionallyExcluded) { ec.Report.SymbolRelatedToPreviousError (delegate_method); MethodOrOperator m = delegate_method.MemberDefinition as MethodOrOperator; if (m != null && m.IsPartialDefinition) { ec.Report.Error (762, loc, "Cannot create delegate from partial method declaration `{0}'", delegate_method.GetSignatureForError ()); } else { ec.Report.Error (1618, loc, "Cannot create delegate with `{0}' because it has a Conditional attribute", TypeManager.CSharpSignature (delegate_method)); } } var expr = method_group.InstanceExpression; if (expr != null && (expr.Type.IsGenericParameter || !TypeSpec.IsReferenceType (expr.Type))) method_group.InstanceExpression = new BoxedCast (expr, ec.BuiltinTypes.Object); eclass = ExprClass.Value; return this; }
public AnonymousExpression Compatible (ResolveContext ec, AnonymousExpression ae) { if (block.Resolved) return this; // TODO: Implement clone BlockContext aec = new BlockContext (ec, block, ReturnType); aec.CurrentAnonymousMethod = ae; var am = this as AnonymousMethodBody; if (ec.HasSet (ResolveContext.Options.InferReturnType) && am != null) { am.ReturnTypeInference = new TypeInferenceContext (); } var bc = ec as BlockContext; if (bc != null) { aec.AssignmentInfoOffset = bc.AssignmentInfoOffset; aec.EnclosingLoop = bc.EnclosingLoop; aec.EnclosingLoopOrSwitch = bc.EnclosingLoopOrSwitch; aec.Switch = bc.Switch; } var errors = ec.Report.Errors; bool res = Block.Resolve (aec); if (res && errors == ec.Report.Errors) { MarkReachable (new Reachability ()); if (!CheckReachableExit (ec.Report)) { return null; } if (bc != null) bc.AssignmentInfoOffset = aec.AssignmentInfoOffset; } if (am != null && am.ReturnTypeInference != null) { am.ReturnTypeInference.FixAllTypes (ec); ReturnType = am.ReturnTypeInference.InferredTypeArguments [0]; am.ReturnTypeInference = null; // // If e is synchronous the inferred return type is T // If e is asynchronous and the body of F is either an expression classified as nothing // or a statement block where no return statements have expressions, the inferred return type is Task // If e is async and has an inferred result type T, the inferred return type is Task<T> // if (block.IsAsync && ReturnType != null) { ReturnType = ReturnType.Kind == MemberKind.Void ? ec.Module.PredefinedTypes.Task.TypeSpec : ec.Module.PredefinedTypes.TaskGeneric.TypeSpec.MakeGenericType (ec, new [] { ReturnType }); } } if (res && errors != ec.Report.Errors) return null; return res ? this : null; }
protected override Expression DoResolve (ResolveContext rc) { if (rc.HasSet (ResolveContext.Options.ConstantScope)) { rc.Report.Error (1706, loc, "Anonymous methods and lambda expressions cannot be used in the current context"); return null; } // // Update top-level block generated duting parsing with actual top-level block // if (rc.HasAny (ResolveContext.Options.FieldInitializerScope | ResolveContext.Options.BaseInitializer) && rc.CurrentMemberDefinition.Parent.PartialContainer.PrimaryConstructorParameters != null) { var tb = rc.ConstructorBlock.ParametersBlock.TopBlock; if (Block.TopBlock != tb) { Block b = Block; while (b.Parent != Block.TopBlock && b != Block.TopBlock) b = b.Parent; b.Parent = tb; tb.IncludeBlock (Block, Block.TopBlock); b.ParametersBlock.TopBlock = tb; } } eclass = ExprClass.Value; // // This hack means `The type is not accessible // anywhere', we depend on special conversion // rules. // type = InternalType.AnonymousMethod; if (!DoResolveParameters (rc)) return null; return this; }
// // Returns AnonymousMethod container if this anonymous method // expression can be implicitly converted to the delegate type `delegate_type' // public Expression Compatible (ResolveContext ec, TypeSpec type) { Expression am; if (compatibles.TryGetValue (type, out am)) return am; TypeSpec delegate_type = CompatibleChecks (ec, type); if (delegate_type == null) return null; // // At this point its the first time we know the return type that is // needed for the anonymous method. We create the method here. // var invoke_mb = Delegate.GetInvokeMethod (delegate_type); TypeSpec return_type = invoke_mb.ReturnType; // // Second: the return type of the delegate must be compatible with // the anonymous type. Instead of doing a pass to examine the block // we satisfy the rule by setting the return type on the EmitContext // to be the delegate type return type. // var body = CompatibleMethodBody (ec, null, return_type, delegate_type); if (body == null) return null; bool etree_conversion = delegate_type != type; try { if (etree_conversion) { if (ec.HasSet (ResolveContext.Options.ExpressionTreeConversion)) { // // Nested expression tree lambda use same scope as parent // lambda, this also means no variable capturing between this // and parent scope // am = body.Compatible (ec, ec.CurrentAnonymousMethod); // // Quote nested expression tree // if (am != null) am = new Quote (am); } else { int errors = ec.Report.Errors; if (Block.IsAsync) { ec.Report.Error (1989, loc, "Async lambda expressions cannot be converted to expression trees"); } using (ec.Set (ResolveContext.Options.ExpressionTreeConversion)) { am = body.Compatible (ec); } // // Rewrite expressions into expression tree when targeting Expression<T> // if (am != null && errors == ec.Report.Errors) am = CreateExpressionTree (ec, delegate_type); } } else { am = body.Compatible (ec); if (body.DirectMethodGroupConversion != null) { var errors_printer = new SessionReportPrinter (); var old = ec.Report.SetPrinter (errors_printer); var expr = new ImplicitDelegateCreation (delegate_type, body.DirectMethodGroupConversion, loc) { AllowSpecialMethodsInvocation = true }.Resolve (ec); ec.Report.SetPrinter (old); if (expr != null && errors_printer.ErrorsCount == 0) am = expr; } } } catch (CompletionResult) { throw; } catch (FatalException) { throw; } catch (Exception e) { throw new InternalErrorException (e, loc); } if (!ec.IsInProbingMode && !etree_conversion) { compatibles.Add (type, am ?? EmptyExpression.Null); } return am; }
protected override Expression DoResolve (ResolveContext ec) { right = right.Resolve (ec); if (right == null) return null; MemberAccess ma = target as MemberAccess; using (ec.Set (ResolveContext.Options.CompoundAssignmentScope)) { target = target.Resolve (ec); } if (target == null) return null; if (target is MethodGroupExpr){ ec.Report.Error (1656, loc, "Cannot assign to `{0}' because it is a `{1}'", ((MethodGroupExpr)target).Name, target.ExprClassName); return null; } var event_expr = target as EventExpr; if (event_expr != null) { source = Convert.ImplicitConversionRequired (ec, right, target.Type, loc); if (source == null) return null; Expression rside; if (op == Binary.Operator.Addition) rside = EmptyExpression.EventAddition; else if (op == Binary.Operator.Subtraction) rside = EmptyExpression.EventSubtraction; else rside = null; target = target.ResolveLValue (ec, rside); if (target == null) return null; eclass = ExprClass.Value; type = event_expr.Operator.ReturnType; return this; } // // Only now we can decouple the original source/target // into a tree, to guarantee that we do not have side // effects. // if (left == null) left = new TargetExpression (target); source = new Binary (op, left, right, true); if (target is DynamicMemberAssignable) { Arguments targs = ((DynamicMemberAssignable) target).Arguments; source = source.Resolve (ec); Arguments args = new Arguments (targs.Count + 1); args.AddRange (targs); args.Add (new Argument (source)); var binder_flags = CSharpBinderFlags.ValueFromCompoundAssignment; // // Compound assignment does target conversion using additional method // call, set checked context as the binary operation can overflow // if (ec.HasSet (ResolveContext.Options.CheckedScope)) binder_flags |= CSharpBinderFlags.CheckedContext; if (target is DynamicMemberBinder) { source = new DynamicMemberBinder (ma.Name, binder_flags, args, loc).Resolve (ec); // Handles possible event addition/subtraction if (op == Binary.Operator.Addition || op == Binary.Operator.Subtraction) { args = new Arguments (targs.Count + 1); args.AddRange (targs); args.Add (new Argument (right)); string method_prefix = op == Binary.Operator.Addition ? Event.AEventAccessor.AddPrefix : Event.AEventAccessor.RemovePrefix; var invoke = DynamicInvocation.CreateSpecialNameInvoke ( new MemberAccess (right, method_prefix + ma.Name, loc), args, loc).Resolve (ec); args = new Arguments (targs.Count); args.AddRange (targs); source = new DynamicEventCompoundAssign (ma.Name, args, (ExpressionStatement) source, (ExpressionStatement) invoke, loc).Resolve (ec); } } else { source = new DynamicIndexBinder (binder_flags, args, loc).Resolve (ec); } return source; } return base.DoResolve (ec); }