Autres/audacity
1
0
Fork 0
mirror of https://github.com/cookiengineer/audacity synced 2026-01-12 07:35:51 +01:00
Code Issues Releases Wiki Activity

Define finally

Browse Source
This commit is contained in:
Paul Licameli
2016-04-09 20:44:38 -04:00
parent 9c18d3853d
commit 7e8aad9148
1 changed files with 25 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
src/MemoryX.h
View File

@@ -614,4 +614,29 @@ make_movable_with_deleter(const Deleter &d, Args&&... args)
return movable_ptr_with_deleter<T, Deleter>(safenew T(std::forward<Args>(args)...), d); return movable_ptr_with_deleter<T, Deleter>(safenew T(std::forward<Args>(args)...), d);
} }
/*
* "finally" as in The C++ Programming Language, 4th ed., p. 358
* Useful for defining ad-hoc RAII actions.
* typical usage:
* auto cleanup = finally([&]{ ... code; ... });
*/
// Construct this from any copyable function object, such as a lambda
template <typename F>
struct Final_action {
Final_action(F f) : clean{ f } {}
~Final_action() { clean(); }
F clean;
Final_action(const Final_action&) PROHIBITED;
Final_action& operator= (const Final_action&) PROHIBITED;
};
// Function template with type deduction lets you construct Final_action
// without typing any angle brackets
template <typename F>
Final_action<F> finally (F f)
{
return Final_action<F>(f);
}
#endif // __AUDACITY_MEMORY_X_H__ #endif // __AUDACITY_MEMORY_X_H__