utils::FastScopeGuard< Callback > Class Template Reference

a helper class to perform actions on scope exit More...

#include <userver/utils/fast_scope_guard.hpp>

Public Member Functions
constexpr	FastScopeGuard (Callback callback) noexcept
constexpr	FastScopeGuard (FastScopeGuard &&other) noexcept
constexpr FastScopeGuard &	operator= (FastScopeGuard &&other) noexcept
constexpr void	Release () noexcept

Detailed Description

template<typename Callback>
class utils::FastScopeGuard< Callback >

a helper class to perform actions on scope exit

The lambda argument must be explicitly marked as noexcept. Only use FastScopeGuard if it's proven that the lambda body is noexcept, otherwise use ScopeGuard.

Usage example:

  int x = 0;
  {
    utils::FastScopeGuard d([&]() noexcept { x = 1; });
    EXPECT_EQ(x, 0);
  }
  EXPECT_EQ(x, 1);

See also

ScopeGuard for type-erasure and throwing functor support

Examples

samples/tcp_full_duplex_service/tcp_full_duplex_service.cpp.

Definition at line 26 of file fast_scope_guard.hpp.

Constructor & Destructor Documentation

FastScopeGuard() [1/2]

template<typename Callback >

constexpr utils::FastScopeGuard< Callback >::FastScopeGuard ( Callback  callback )

inlineexplicitconstexprnoexcept

Definition at line 36 of file fast_scope_guard.hpp.

FastScopeGuard() [2/2]

template<typename Callback >

constexpr utils::FastScopeGuard< Callback >::FastScopeGuard ( FastScopeGuard< Callback > &&  other )

inlineconstexprnoexcept

Definition at line 39 of file fast_scope_guard.hpp.

~FastScopeGuard()

template<typename Callback >

utils::FastScopeGuard< Callback >::~FastScopeGuard ( )

inline

Definition at line 51 of file fast_scope_guard.hpp.

Member Function Documentation

operator=()

template<typename Callback >

constexpr FastScopeGuard & utils::FastScopeGuard< Callback >::operator= ( FastScopeGuard< Callback > &&  other )

inlineconstexprnoexcept

Definition at line 43 of file fast_scope_guard.hpp.

Release()

template<typename Callback >

constexpr void utils::FastScopeGuard< Callback >::Release ( )

inlineconstexprnoexcept

Definition at line 55 of file fast_scope_guard.hpp.

---

The documentation for this class was generated from the following file:

• userver/utils/fast_scope_guard.hpp