internal static Candidate GetPreferredCandidate(MethodCandidate one, MethodCandidate two, CallTypes callType, MetaObject[] actualTypes)
{
Candidate cmpParams = ParameterWrapper.GetPreferredParameters(one.Parameters, two.Parameters, actualTypes);
if (cmpParams.Chosen())
{
return(cmpParams);
}
Candidate ret = MethodTarget.CompareEquivalentParameters(one.Target, two.Target);
if (ret.Chosen())
{
return(ret);
}
if (CompilerHelpers.IsStatic(one.Target.Method) && !CompilerHelpers.IsStatic(two.Target.Method))
{
return(callType == CallTypes.ImplicitInstance ? Candidate.Two : Candidate.One);
}
else if (!CompilerHelpers.IsStatic(one.Target.Method) && CompilerHelpers.IsStatic(two.Target.Method))
{
return(callType == CallTypes.ImplicitInstance ? Candidate.One : Candidate.Two);
}
return(Candidate.Equivalent);
}
private static Candidate GetPreferredParameter(ParameterWrapper candidateOne, ParameterWrapper candidateTwo)
{
Assert.NotNull(candidateOne, candidateTwo);
if (candidateOne._binder.ParametersEquivalent(candidateOne, candidateTwo))
{
return(Candidate.Equivalent);
}
Type t1 = candidateOne.Type;
Type t2 = candidateTwo.Type;
if (candidateOne._binder.CanConvertFrom(t2, candidateOne, NarrowingLevel.None))
{
if (candidateOne._binder.CanConvertFrom(t1, candidateTwo, NarrowingLevel.None))
{
return(Candidate.Ambiguous);
}
else
{
return(Candidate.Two);
}
}
if (candidateOne._binder.CanConvertFrom(t1, candidateTwo, NarrowingLevel.None))
{
return(Candidate.One);
}
// Special additional rules to order numeric value types
Candidate preferred = candidateOne._binder.PreferConvert(t1, t2);
if (preferred.Chosen())
{
return(preferred);
}
preferred = candidateOne._binder.PreferConvert(t2, t1).TheOther();
if (preferred.Chosen())
{
return(preferred);
}
return(Candidate.Ambiguous);
}
private static Candidate GetPreferredParameter(ParameterWrapper candidateOne, ParameterWrapper candidateTwo, MetaObject actualType)
{
Assert.NotNull(candidateOne, candidateTwo, actualType);
if (candidateOne._binder.ParametersEquivalent(candidateOne, candidateTwo))
{
return(Candidate.Equivalent);
}
for (NarrowingLevel curLevel = NarrowingLevel.None; curLevel <= NarrowingLevel.All; curLevel++)
{
Candidate candidate = candidateOne._binder.SelectBestConversionFor(actualType.LimitType, candidateOne, candidateTwo, curLevel);
if (candidate.Chosen())
{
return(candidate);
}
}
return(GetPreferredParameter(candidateOne, candidateTwo));
}