private static bool AreValidArgumentsForParameters(Type[] argTypes, ParameterInfo[] parameters)
{
Debug.Assert(argTypes.Length == parameters.Length);
// Match if every given argument is implicitly convertible to the method's corresponding parameter
for (int i = 0; i <= argTypes.Length - 1; i++)
{
if (ImplicitConverter.EmitImplicitConvert(argTypes[i], parameters[i].ParameterType, null) == false)
{
return(false);
}
}
return(true);
}
public override System.Reflection.MethodBase SelectMethod(System.Reflection.BindingFlags bindingAttr, System.Reflection.MethodBase[] match, System.Type[] types, System.Reflection.ParameterModifier[] modifiers)
{
foreach (MethodInfo mi in match)
{
ParameterInfo[] parameters = mi.GetParameters();
bool leftValid = ImplicitConverter.EmitImplicitConvert(_myLeftType, parameters[0].ParameterType, null);
bool rightValid = ImplicitConverter.EmitImplicitConvert(_myRightType, parameters[1].ParameterType, null);
if (leftValid == true & rightValid == true)
{
return(mi);
}
}
return(null);
}
private bool IsParamArrayMatch(Type[] argTypes, ParameterInfo[] parameters, ParameterInfo paramArrayParameter)
{
// Get the count of arguments before the paramArray parameter
int fixedParameterCount = paramArrayParameter.Position;
Type[] fixedArgTypes = new Type[fixedParameterCount];
ParameterInfo[] fixedParameters = new ParameterInfo[fixedParameterCount];
// Get the argument types and parameters before the paramArray
System.Array.Copy(argTypes, fixedArgTypes, fixedParameterCount);
System.Array.Copy(parameters, fixedParameters, fixedParameterCount);
// If the fixed arguments don't match, we are not a match
if (AreValidArgumentsForParameters(fixedArgTypes, fixedParameters) == false)
{
return(false);
}
// Get the type of the paramArray
ParamArrayElementType = paramArrayParameter.ParameterType.GetElementType();
// Get the types of the arguments passed to the paramArray
Type[] paramArrayArgTypes = new Type[argTypes.Length - fixedParameterCount];
System.Array.Copy(argTypes, fixedParameterCount, paramArrayArgTypes, 0, paramArrayArgTypes.Length);
// Check each argument
foreach (Type argType in paramArrayArgTypes)
{
if (ImplicitConverter.EmitImplicitConvert(argType, ParamArrayElementType, null) == false)
{
return(false);
}
}
MyFixedArgTypes = fixedArgTypes;
MyParamArrayArgTypes = paramArrayArgTypes;
// They all match, so we are a match
return(true);
}