/// <summary>
/// Resolves an extension method by arguments.
/// </summary>
public static MethodWrapper ResolveExtensionMethod(ExtensionMethodResolver resolver, Type type, string name, Type[] argTypes, Type[] hints, LambdaResolver lambdaResolver)
{
var method = resolver.ResolveExtensionMethod(type, name, argTypes);
var args = method.GetParameters();
var info = new MethodWrapper
{
Name = name,
Type = method.DeclaringType,
MethodInfo = method,
IsStatic = true,
IsVirtual = false,
ReturnType = method.ReturnType,
ArgumentTypes = args.Select(p => p.ParameterType).ToArray(),
IsPartiallyApplied = IsPartiallyApplied(argTypes),
IsVariadic = IsVariadic(method),
};
if (method.IsGenericMethod)
{
var expectedTypes = method.GetParameters().Select(p => p.ParameterType).ToArray();
var genericDefs = method.GetGenericArguments();
var extMethodArgs = argTypes.ToList();
extMethodArgs.Insert(0, type);
var genericValues = GenericHelper.ResolveMethodGenericsByArgs(
expectedTypes,
extMethodArgs.ToArray(),
genericDefs,
hints,
lambdaResolver
);
info.GenericArguments = genericValues;
info.MethodInfo = info.MethodInfo.MakeGenericMethod(genericValues);
info.ReturnType = GenericHelper.ApplyGenericArguments(info.ReturnType, genericDefs, genericValues);
info.ArgumentTypes = expectedTypes.Select(t => GenericHelper.ApplyGenericArguments(t, genericDefs, genericValues)).ToArray();
}
else if (hints != null)
{
error(CompilerMessages.GenericArgsToNonGenericMethod, name);
}
return(info);
}
/// <summary>
/// Resolves a method by its name and argument types. If generic arguments are passed, they are also applied.
/// Generic arguments whose values can be inferred from argument types can be skipped.
/// </summary>
public static MethodWrapper ResolveMethod(Type type, string name, Type[] argTypes, Type[] hints, LambdaResolver lambdaResolver)
{
var mw = new MethodWrapper {
Name = name, Type = type
};
try
{
var method = ResolveMethodByArgs(
getMethodsByName(type, name),
m => m.GetParameters().Select(p => p.ParameterType).ToArray(),
IsVariadic,
argTypes
);
var mInfo = method.Method;
if (mInfo.IsGenericMethod)
{
var genericDefs = mInfo.GetGenericArguments();
var genericValues = GenericHelper.ResolveMethodGenericsByArgs(method.ArgumentTypes, argTypes, genericDefs, hints);
mInfo = mInfo.MakeGenericMethod(genericValues);
mw.GenericArguments = genericValues;
}
else if (hints != null)
{
error(CompilerMessages.GenericArgsToNonGenericMethod, name);
}
mw.MethodInfo = mInfo;
mw.IsStatic = mInfo.IsStatic;
mw.IsVirtual = mInfo.IsVirtual;
mw.ArgumentTypes = method.ArgumentTypes;
mw.ReturnType = mInfo.ReturnType;
mw.IsPartiallyApplied = IsPartiallyApplied(argTypes);
mw.IsVariadic = IsVariadic(mInfo);
return(mw);
}
catch (NotSupportedException)
{
if (!type.IsGenericType)
{
throw new KeyNotFoundException();
}
var genType = type.GetGenericTypeDefinition();
var genMethod = ResolveMethodByArgs(
getMethodsByName(genType, name),
m => m.GetParameters().Select(p => GenericHelper.ApplyGenericArguments(p.ParameterType, type, false)).ToArray(),
IsVariadic,
argTypes
);
var mInfoOriginal = genMethod.Method;
var declType = resolveActualDeclaringType(type, mInfoOriginal.DeclaringType);
var mInfo = getMethodVersionForType(declType, mInfoOriginal);
if (mInfoOriginal.IsGenericMethod)
{
var genericDefs = mInfoOriginal.GetGenericArguments();
var genericValues = GenericHelper.ResolveMethodGenericsByArgs(genMethod.ArgumentTypes, argTypes, genericDefs, hints, lambdaResolver);
mInfo = mInfo.MakeGenericMethod(genericValues);
var totalGenericDefs = genericDefs.Union(genType.GetGenericTypeDefinition().GetGenericArguments()).ToArray();
var totalGenericValues = genericValues.Union(type.GetGenericArguments()).ToArray();
mw.GenericArguments = genericValues;
mw.ReturnType = GenericHelper.ApplyGenericArguments(mInfoOriginal.ReturnType, totalGenericDefs, totalGenericValues);
mw.ArgumentTypes = mInfoOriginal.GetParameters().Select(p => GenericHelper.ApplyGenericArguments(p.ParameterType, totalGenericDefs, totalGenericValues)).ToArray();
}
else
{
if (hints != null)
{
error(CompilerMessages.GenericArgsToNonGenericMethod, name);
}
mw.ArgumentTypes = mInfoOriginal.GetParameters().Select(p => GenericHelper.ApplyGenericArguments(p.ParameterType, type)).ToArray();
mw.ReturnType = GenericHelper.ApplyGenericArguments(mInfoOriginal.ReturnType, type, false);
}
mw.MethodInfo = mInfo;
mw.IsStatic = mInfoOriginal.IsStatic;
mw.IsVirtual = mInfoOriginal.IsVirtual;
mw.IsPartiallyApplied = IsPartiallyApplied(argTypes);
mw.IsVariadic = IsVariadic(mInfoOriginal);
}
return(mw);
}
