private IValue doFunctionCall(ParserRuleContext context, string targetFunctionName, List <IValue> parameters, IValue target, ClepsType targetType, bool allowVoidReturn)
{
IValue dereferencedTarget = target == null? null : GetDereferencedRegisterOrNull(target);
BasicClepsType dereferencedType = target == null? targetType as BasicClepsType : dereferencedTarget.ExpressionType as BasicClepsType;
if (dereferencedType == null)
{
string errorMessage = String.Format("Could not dereference expression on type {0}", targetType.GetClepsTypeString());
Status.AddError(new CompilerError(FileName, context.Start.Line, context.Start.Column, errorMessage));
//just return something to avoid stalling
return(CodeGenerator.CreateByte(0));
}
ClepsClass targetClepsClass = ClassManager.GetClass(dereferencedType.GetClepsTypeString());
List <ClepsVariable> functionOverloads;
bool isStatic;
if (targetClepsClass.StaticMemberMethods.ContainsKey(targetFunctionName))
{
isStatic = true;
functionOverloads = targetClepsClass.StaticMemberMethods[targetFunctionName];
}
else if (target != null && targetClepsClass.MemberMethods.ContainsKey(targetFunctionName))
{
isStatic = false;
functionOverloads = targetClepsClass.MemberMethods[targetFunctionName];
}
else
{
string errorMessage = String.Format("Class {0} does not contain a {1}static function called {2}.", targetClepsClass.FullyQualifiedName, target == null? "" : "member or ", targetFunctionName);
Status.AddError(new CompilerError(FileName, context.Start.Line, context.Start.Column, errorMessage));
//Just return something to avoid stalling compilation
return(CodeGenerator.CreateByte(0));
}
int matchedPosition;
string fnMatchErrorMessage;
if (!FunctionOverloadManager.FindMatchingFunctionType(TypeManager, functionOverloads, parameters, out matchedPosition, out fnMatchErrorMessage))
{
Status.AddError(new CompilerError(FileName, context.Start.Line, context.Start.Column, fnMatchErrorMessage));
//Just return something to avoid stalling compilation
return(CodeGenerator.CreateByte(0));
}
FunctionClepsType chosenFunctionType = functionOverloads[matchedPosition].VariableType as FunctionClepsType;
if (!allowVoidReturn && chosenFunctionType.ReturnType == VoidClepsType.GetVoidType())
{
string errorMessage = String.Format("Function {0} does not return a value", targetFunctionName);
Status.AddError(new CompilerError(FileName, context.Start.Line, context.Start.Column, errorMessage));
//Just return something to avoid stalling compilation
return(CodeGenerator.CreateByte(0));
}
IValue returnValue = CodeGenerator.GetFunctionCallReturnValue(isStatic? null : dereferencedTarget, dereferencedType, targetFunctionName, chosenFunctionType, parameters);
return(returnValue);
}
private IValue doFunctionCall(ClepsParser.FunctionCallContext functionCall, ClepsType targetType, bool isMemberFunctionsAccessible, bool allowVoidReturn)
{
ClepsClass targetClepsClass;
if (targetType is BasicClepsType)
{
targetClepsClass = ClassManager.GetClass(targetType.GetClepsTypeString());
}
else if (targetType is BasicStaticClepsType)
{
targetClepsClass = ClassManager.GetClass(targetType.GetClepsTypeString());
isMemberFunctionsAccessible = false;
}
else
{
throw new NotImplementedException("Function calls on non basic types not supported");
}
string targetFunctionName = functionCall.FunctionName.GetText();
List <IValue> parameters = functionCall._FunctionParameters.Select(p => Visit(p) as IValue).ToList();
ClepsType functionType = null;
if (targetClepsClass.StaticMemberMethods.ContainsKey(targetFunctionName))
{
functionType = targetClepsClass.StaticMemberMethods[targetFunctionName];
}
else if (isMemberFunctionsAccessible && targetClepsClass.MemberMethods.ContainsKey(targetFunctionName))
{
functionType = targetClepsClass.MemberMethods[targetFunctionName];
}
if (functionType == null)
{
string errorMessage = String.Format("Class {0} does not contain a function called {1}", targetClepsClass.FullyQualifiedName, targetFunctionName);
Status.AddError(new CompilerError(FileName, functionCall.Start.Line, functionCall.Start.Column, errorMessage));
//Just return something to avoid stalling compilation
return(CodeGenerator.CreateByte(0));
}
List <ClepsType> functionOverloads = new List <ClepsType> {
functionType
};
int matchedPosition;
string fnMatchErrorMessage;
if (!FunctionOverloadManager.FindMatchingFunctionType(functionOverloads, parameters, out matchedPosition, out fnMatchErrorMessage))
{
Status.AddError(new CompilerError(FileName, functionCall.Start.Line, functionCall.Start.Column, fnMatchErrorMessage));
//Just return something to avoid stalling compilation
return(CodeGenerator.CreateByte(0));
}
FunctionClepsType chosenFunctionType = functionOverloads[matchedPosition] as FunctionClepsType;
if (!allowVoidReturn && chosenFunctionType.ReturnType == VoidType.GetVoidType())
{
string errorMessage = String.Format("Function {0} does not return a value", targetFunctionName);
Status.AddError(new CompilerError(FileName, functionCall.Start.Line, functionCall.Start.Column, errorMessage));
//Just return something to avoid stalling compilation
return(CodeGenerator.CreateByte(0));
}
IValue returnValue = CodeGenerator.GetFunctionCallReturnValue(FullyQualifiedClassName, targetFunctionName, chosenFunctionType, parameters);
return(returnValue);
}
