private float ComputeScoreForParamArray(ParameterInfo[] parameters, Type[] argTypes)
{
var paramArrayParameter = parameters[parameters.Length - 1];
var fixedParameterCount = paramArrayParameter.Position;
var fixedParameters = new ParameterInfo[fixedParameterCount];
Array.Copy(parameters, fixedParameters, fixedParameterCount);
var fixedSum = ComputeSum(fixedParameters, this.myFixedArgTypes);
var paramArrayElementType = paramArrayParameter.ParameterType.GetElementType();
var paramArraySum = 0;
foreach (var argType in this.myParamArrayArgTypes)
{
paramArraySum += ImplicitConverter.GetImplicitConvertScore(argType, paramArrayElementType);
}
float score = 0;
if (argTypes.Length > 0)
{
score = (fixedSum + paramArraySum) / argTypes.Length;
}
else
{
score = 0;
}
// The param array score gets a slight penalty so that it scores worse than direct matches
return(score + 1);
}
private static int ComputeSum(ParameterInfo[] parameters, Type[] argTypes)
{
Debug.Assert(parameters.Length == argTypes.Length);
var sum = 0;
for (var i = 0; i <= parameters.Length - 1; i++)
{
sum += ImplicitConverter.GetImplicitConvertScore(argTypes[i], parameters[i].ParameterType);
}
return(sum);
}
