/// <summary>
/// Find matching a matching method by name and sig on a type. (Restricted to virtual methods only)
/// </summary>
/// <param name="targetMethod"></param>
/// <param name="currentType"></param>
/// <param name="reverseMethodSearch">Used to control the order of the search. For historical purposes to
/// match .NET Framework behavior, this is typically true, but not always. There is no particular rationale
/// for the particular orders other than to attempt to be consistent in virtual method override behavior
/// betweeen runtimes.</param>
/// <param name="nameSigMatchMethodIsValidCandidate"></param>
/// <returns></returns>
private static MethodDesc FindMatchingVirtualMethodOnTypeByNameAndSig(MethodDesc targetMethod, DefType currentType, bool reverseMethodSearch, Func <MethodDesc, MethodDesc, bool> nameSigMatchMethodIsValidCandidate)
{
string name = targetMethod.Name;
MethodSignature sig = targetMethod.Signature;
MethodDesc implMethod = null;
foreach (MethodDesc candidate in currentType.GetAllVirtualMethods())
{
if (candidate.Name == name)
{
if (candidate.Signature.Equals(sig))
{
if (nameSigMatchMethodIsValidCandidate == null || nameSigMatchMethodIsValidCandidate(targetMethod, candidate))
{
implMethod = candidate;
// If reverseMethodSearch is enabled, we want to find the last match on this type, not the first
// (reverseMethodSearch is used for most matches except for searches for name/sig method matches for interface methods on the most derived type)
if (!reverseMethodSearch)
{
return(implMethod);
}
}
}
}
}
return(implMethod);
}
private static MethodDesc FindMatchingVirtualMethodOnTypeByNameAndSig(MethodDesc targetMethod, DefType currentType)
{
string name = targetMethod.Name;
MethodSignature sig = targetMethod.Signature;
// TODO: InstantiatedType.GetMethod can't handle this for a situation like
// an instantiation of Foo<T>.M(T) because sig is instantiated, but it compares
// it to the uninstantiated version
//MethodDesc implMethod = currentType.GetMethod(name, sig);
MethodDesc implMethod = null;
foreach (MethodDesc candidate in currentType.GetAllVirtualMethods())
{
if (candidate.Name == name)
{
if (candidate.Signature.Equals(sig))
{
if (implMethod != null)
{
throw new NotImplementedException("NYI: differentiating between overloads on instantiations when the instantiated signatures match.");
}
implMethod = candidate;
}
}
}
return(implMethod);
}