public override IReturnType ResolveReturnType(IReturnType[] parameterTypes)
{
if (lambdaExpression == null)
{
return(ResolveReturnType());
}
try {
MemberLookupHelper.Log("LambdaReturnType: SetImplicitLambdaParameterTypes ", parameterTypes);
resolver.SetImplicitLambdaParameterTypes(lambdaExpression, parameterTypes);
return(ResolveReturnType());
} finally {
resolver.UnsetImplicitLambdaParameterTypes(lambdaExpression);
}
}
public override IReturnType ResolveReturnType()
{
MemberLookupHelper.Log("LambdaReturnType: ResolveReturnType");
IReturnType result;
if (returnExpressions.Count == 0)
{
result = resolver.ProjectContent.SystemTypes.Void;
}
else
{
result = returnExpressions.Select(rt => resolver.ResolveInternal(rt, ExpressionContext.Default))
.Select(rr => rr != null ? rr.ResolvedType : null)
.Aggregate((rt1, rt2) => MemberLookupHelper.GetCommonType(resolver.ProjectContent, rt1, rt2));
}
MemberLookupHelper.Log("LambdaReturnType: inferred " + result);
return(result);
}
public static IMethodOrProperty FindOverload(IList <IMethodOrProperty> list,
IReturnType[] arguments,
bool allowAdditionalArguments,
bool substituteInferredTypes,
out bool acceptableMatch)
{
OverloadResolution or = new OverloadResolution();
or.candidates = list.Select(m => new Candidate(m)).ToList();
or.arguments = arguments;
or.allowAdditionalArguments = allowAdditionalArguments;
if (or.candidates.Count == 0)
{
throw new ArgumentException("at least one candidate is required");
}
MemberLookupHelper.Log("OverloadResolution");
MemberLookupHelper.Log(" arguments = ", arguments);
or.ConstructExpandedForms();
or.InferTypeArguments();
or.CheckApplicability();
Candidate result = or.FindBestCandidate();
MemberLookupHelper.Log("Overload resolution finished. Winning candidate = " + result);
acceptableMatch = result.Status == CandidateStatus.Success;
if (substituteInferredTypes)
{
return(result.Method);
}
else
{
return(result.OriginalMethod);
}
}
void Log(string text)
{
MemberLookupHelper.Log(text);
}
void LogStep(string title)
{
MemberLookupHelper.Log(" candidates = ", candidates);
MemberLookupHelper.Log("Overload resolution (" + title + ")");
}
static void Log(string text, IEnumerable <IReturnType> types)
{
MemberLookupHelper.Log(text, types);
}