internal IncrementDecrementOperatorNode(InternalUnaryOperatorType type, ExpressionNode operand, MethodReference overload)
: base(operand.SequencePoint)
{
OverloadedOperatorMethod = overload;
this.operand = operand;
switch (type)
{
case InternalUnaryOperatorType.PreIncrement:
IncrementDecrementType = IncrementDecrementOperatorType.PreIncrement;
break;
case InternalUnaryOperatorType.PreDecrement:
IncrementDecrementType = IncrementDecrementOperatorType.PreDecrement;
break;
case InternalUnaryOperatorType.PostIncrement:
IncrementDecrementType = IncrementDecrementOperatorType.PostIncrement;
break;
case InternalUnaryOperatorType.PostDecrement:
IncrementDecrementType = IncrementDecrementOperatorType.PostDecrement;
break;
default:
throw new ArgumentException();
}
}
private static bool IsIncrementDecrement(InternalUnaryOperatorType op)
{
switch (op)
{
case InternalUnaryOperatorType.BinaryNot:
case InternalUnaryOperatorType.LogicalNot:
case InternalUnaryOperatorType.Negation:
return(false);
case InternalUnaryOperatorType.PreIncrement:
case InternalUnaryOperatorType.PreDecrement:
case InternalUnaryOperatorType.PostIncrement:
case InternalUnaryOperatorType.PostDecrement:
return(true);
default:
throw new ArgumentException();
}
}
internal UnaryOperatorNode(InternalUnaryOperatorType type, ExpressionNode operand)
: base(operand.SequencePoint)
{
this.operand = operand;
switch (type)
{
case InternalUnaryOperatorType.BinaryNot:
this.UnaryOperatorType = UnaryOperatorNodeType.BinaryNot;
break;
case InternalUnaryOperatorType.LogicalNot:
this.UnaryOperatorType = UnaryOperatorNodeType.LogicalNot;
break;
case InternalUnaryOperatorType.Negation:
this.UnaryOperatorType = UnaryOperatorNodeType.Negation;
break;
default:
throw new ArgumentException();
}
}
private static void OperatorMissmatch(SequencePoint point, InternalUnaryOperatorType op, TypeReference operand)
{
ErrorCode.TypeMismatch.ReportAndThrow(point,
"Unable to perform {0} on operand {1}, no built int operation or operaror overload found",
op, operand.FullName);
}
private static ExpressionNode AsBinary(ExpressionNode expression, InternalUnaryOperatorType op)
{
return(expression.ExpressionReturnType.IsIntegerType() ? new UnaryOperatorNode(op, expression) : null);
}
private static ExpressionNode AsLogical(ExpressionNode expression, InternalUnaryOperatorType op)
{
return(expression.ExpressionReturnType.IsBooleanType() ? new UnaryOperatorNode(op, expression) : null);
}
private static ExpressionNode AsNegation(ExpressionNode expression, InternalUnaryOperatorType op)
{
return(expression.ExpressionReturnType.IsSignedInteger() ? new UnaryOperatorNode(op, expression) : null);
}
private static ExpressionNode AsInc(ExpressionNode expression, InternalUnaryOperatorType op)
{
return(expression.ExpressionReturnType.IsNumericType() ? new IncrementDecrementOperatorNode(op, expression, null) : null);
}
public static ExpressionNode Create(ContextNode context, ExpressionNode expression, InternalUnaryOperatorType op)
{
if (!expression.IsGettable)
{
ErrorCode.NotAnRValue.ReportAndThrow(expression.SequencePoint, "Unary operands must be gettable");
}
if (!expression.IsSettable && IsIncrementDecrement(op))
{
ErrorCode.NotAnLValue.ReportAndThrow(expression.SequencePoint, "Unary operation {0} requires a settable operand", op);
}
ExpressionNode result = AsBuiltIn(context, expression, op);
if (result == null)
{
result = AsOverload(context, expression, op);
}
if (result == null)
{
OperatorMissmatch(expression.SequencePoint, op, expression.ExpressionReturnType);
}
Contract.Assume(result != null);
return(result);
}
private static ExpressionNode CreateOverload(ContextNode context, ExpressionNode expression, InternalUnaryOperatorType op, MethodReference method)
{
var point = expression.SequencePoint;
if (IsIncrementDecrement(op))
{
TypeUtils.VerifyAccessible(method, context.GetClass().TypeReference, point);
return(new IncrementDecrementOperatorNode(op, expression, method));
}
else
{
return(MethodCallNode.Create(context, new MethodNode(method, null, context, point), expression.Enumerate(), point));
}
}
private static ExpressionNode AsOverload(ContextNode context, ExpressionNode expression, InternalUnaryOperatorType op)
{
string name = Overloads[op];
var point = expression.SequencePoint;
var methods = TypeUtils.GetOperatorMethods(context.Assembly, expression, name);
var argsTypes = expression.ExpressionReturnType.Enumerate();
methods = methods.Where(m => MetadataHelpers.MatchesArgumentList(m, argsTypes));
var method = AssemblyRegistry.GetCompatibleMethod(methods, argsTypes);
if (method != null)
{
return(CreateOverload(context, expression, op, method));
}
else
{
if (methods.Count() == 0)
{
return(null);
}
else
{
ErrorCode.TypeMismatch.ReportAndThrow(point,
"Overloaded operator {0} for operand {1} is ambiguous",
name, expression.ExpressionReturnType.FullName);
return(null);//unreachable
}
}
}
private static ExpressionNode AsBuiltIn(ContextNode context, ExpressionNode expression, InternalUnaryOperatorType op)
{
ExpressionNode instance = null;
switch (op)
{
case InternalUnaryOperatorType.BinaryNot:
instance = AsBinary(expression, op);
break;
case InternalUnaryOperatorType.LogicalNot:
instance = AsLogical(expression, op);
break;
case InternalUnaryOperatorType.Negation:
instance = AsNegation(expression, op);
break;
case InternalUnaryOperatorType.PostDecrement:
case InternalUnaryOperatorType.PostIncrement:
case InternalUnaryOperatorType.PreDecrement:
case InternalUnaryOperatorType.PreIncrement:
instance = AsInc(expression, op);
break;
default:
ErrorCode.InvalidStructure.ReportAndThrow(expression.SequencePoint, "Unary op expected, '{0}' received", op);
break; //unreachable
}
return(instance);
}