kuhf / scopeguard

A header-only, modern C++ and fast facility ScopeGuard that provide multiple usages which are simple and easy to use.

ScopeGuard

A header-only, modern C++ and fast facility ScopeGuard that provide multiple usages which are simple and easy to use as other languages provide.

C++14 or later standard is required.

Simple examples

There're 3 ways to use ScopeGuard:

1. Put the code executing when leaving current scope in code block finally{ }.

#include "ScopeGuard.h"
...
{
    ...
    finally{
        // callback statments
        // such as releasing resources
    };
    ...
} // callback statments are executed at this point

2. put callable in INVOKE_ON_EXIT( )

...
{
    void my_callback();
    ...
    INVOKE_ON_EXIT(my_callback);
    ...
    INVOKE_ON_EXIT([&] { /* releasing resources */ });
    ...
} // lambda and my_callback are invoked at this point

3. using the make function MakeScopeGuard manually.

...
{
    ...
    auto guard = sg::MakeScopeGuard(my_callback);
    ...
} // my_callback is invoked at this point

You could see the comments in ScopeGuard.h for more.

Tutorial

See tutorial here and also here (Chinese).