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);
}
public ClepsFunctionBodyGeneratorVisitor(CompileStatus status, ClassManager classManager, ICodeGenerator codeGenerator, TypeManager typeManager, FunctionOverloadManager functionOverloadManager) : base(status, classManager, codeGenerator)
{
TypeManager = typeManager;
FunctionOverloadManager = functionOverloadManager;
}
