public static int CalculateArgumentScore(Type paramType, Type argType)
{
if (null == argType)
{
return(!paramType.IsValueType ? ExactMatchScore : -1);
}
if (paramType == argType)
{
return(ExactMatchScore);
}
if (paramType.IsAssignableFrom(argType))
{
return(UpCastScore);
}
if (argType.IsAssignableFrom(paramType))
{
return(DowncastScore);
}
if (IsNumericPromotion(paramType, argType))
{
return(NumericTypes.IsWideningPromotion(paramType, argType) ? WideningPromotion : NarrowingPromotion);
}
var conversion = RuntimeServices.FindImplicitConversionOperator(argType, paramType);
if (null != conversion)
{
return(ImplicitConversionScore);
}
return(-1);
}
public static int CalculateArgumentScore(Type paramType, Type argType)
{
if (null == argType)
{
if (paramType.IsValueType)
{
return(-1);
}
return(CandidateMethod.ExactMatchScore);
}
else
{
if (paramType == argType)
{
return(CandidateMethod.ExactMatchScore);
}
if (paramType.IsAssignableFrom(argType))
{
return(CandidateMethod.UpCastScore);
}
if (argType.IsAssignableFrom(paramType))
{
return(CandidateMethod.DowncastScore);
}
if (IsNumericPromotion(paramType, argType))
{
if (NumericTypes.IsWideningPromotion(paramType, argType))
{
return(WideningPromotion);
}
return(CandidateMethod.NarrowingPromotion);
}
MethodInfo conversion = RuntimeServices.FindImplicitConversionOperator(argType, paramType);
if (null != conversion)
{
return(CandidateMethod.ImplicitConversionScore);
}
}
return(-1);
}