Last active
February 16, 2026 17:10
-
-
Save win-t/125f9e75c0a0f4a74a951478d27ccb4f to your computer and use it in GitHub Desktop.
C++ defer
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #pragma once | |
| #include <utility> | |
| template <typename F> | |
| struct DeferFinalizer final | |
| { | |
| F func; | |
| DeferFinalizer(F &&f) | |
| : func(std::forward<F>(f)) | |
| { | |
| } | |
| ~DeferFinalizer() | |
| { | |
| func(); | |
| } | |
| DeferFinalizer(const DeferFinalizer &) = delete; | |
| DeferFinalizer &operator=(const DeferFinalizer &) = delete; | |
| DeferFinalizer(DeferFinalizer &&) = delete; | |
| DeferFinalizer &operator=(DeferFinalizer &&) = delete; | |
| }; | |
| struct | |
| { | |
| template <typename F> | |
| DeferFinalizer<F> operator<<(F &&f) | |
| { | |
| return DeferFinalizer<F>(std::forward<F>(f)); | |
| } | |
| } deferrer; | |
| #define TOKENPASTE(x, y) x##y | |
| #define TOKENPASTE2(x, y) TOKENPASTE(x, y) | |
| #define defer auto TOKENPASTE2(__deferred_lambda_call, __COUNTER__) = deferrer << [&] |
Author
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
this snippet is copied from here
to make it downloadable
just