ScopeGuard< Fn > Struct Template Reference

An easy way to ensure that a function is called at the end of the current scope. More...

Inherits Fn.

Public Member Functions
	~ScopeGuard ()

Detailed Description

template<typename Fn>
struct ScopeGuard< Fn >

An easy way to ensure that a function is called at the end of the current scope.

Usage:

{
    if (flag == true)
        return;
 
    // While this code executes, flag is true e.g. to prevent reentrancy
    flag = true;
    // When we exit this scope, flag must be false
    const ScopeGuard scope { [&] { flag = false; } };
 
    if (checkInitialCondition())
        return; // Scope's lambda will fire here...
 
    if (checkCriticalCondition())
        throw std::runtime_error{}; // ...or here...
 
    doWorkHavingEstablishedPreconditions();
} // ...or here!

Constructor & Destructor Documentation

~ScopeGuard()

template<typename Fn>

ScopeGuard< Fn >::~ScopeGuard

(

)

References ~ScopeGuard().

Referenced by ~ScopeGuard().