/usr/local/lib64/python3.6/site-packages/torch/include/c10/util
Edit: /usr/local/lib64/python3.6/site-packages/torch/include/c10/util/FunctionRef.h (2301B)
//===- llvm/ADT/STLExtras.h - Useful STL related functions ------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains some templates that are useful if you are working with the
// STL at all.
//
// No library is required when using these functions.
//
//===----------------------------------------------------------------------===//
// c10: modified from llvm::function_ref
// c10: added more SFINAE to enable use in overloaded functions
#pragma once
#include
#include
#include
namespace c10 {
/// An efficient, type-erasing, non-owning reference to a callable. This is
/// intended for use as the type of a function parameter that is not used
/// after the function in question returns.
///
/// This class does not own the callable, so it is not in general safe to store
/// a function_ref.
template
class function_ref;
template
class function_ref {
Ret (*callback)(intptr_t callable, Params... params) = nullptr;
intptr_t callable;
template
static Ret callback_fn(intptr_t callable, Params... params) {
return (*reinterpret_cast(callable))(std::forward(
params)...);
}
public:
function_ref() = default;
function_ref(std::nullptr_t) {}
template
function_ref(
Callable&& callable,
typename std::enable_if::type,
function_ref>::value>::type* = nullptr,
typename std::enable_if::type,
Ret>::value>::type* = nullptr)
: callback(callback_fn::type>),
callable(reinterpret_cast(&callable)) {}
Ret operator()(Params... params) const {
return callback(callable, std::forward(params)...);
}
operator bool() const {
return callback;
}
};
} // namespace c10