DNDS::ScopedValueAlternator< T > Class Template Reference

RAII sentinel: on construction replaces ref with a new value and on destruction restores the original value. More...

#include <ScopedValueAlternator.hpp>

Public Member Functions
template<class TAssign >
	ScopedValueAlternator (T &ref, TAssign &&vAssign)
	Save the current value of ref and overwrite it with vAssign.
	~ScopedValueAlternator ()

Detailed Description

template<class T>
class DNDS::ScopedValueAlternator< T >

RAII sentinel: on construction replaces ref with a new value and on destruction restores the original value.

Useful for surgically changing a global / member flag for the duration of a function without adding explicit try/catch cleanup:

{
  ScopedValueAlternator<bool> g(DNDS::Debug::isDebugging, true);
  runDiagnostics();
} // isDebugging restored here, even on exception

Move/copy are not declared; an instance must stay in the scope that owns the reference.

Template Parameters

T	Any assignable type.

Definition at line 27 of file ScopedValueAlternator.hpp.

Constructor & Destructor Documentation

ScopedValueAlternator()

template<class T >

template<class TAssign >

DNDS::ScopedValueAlternator< T >::ScopedValueAlternator ( T &  ref, TAssign &&  vAssign  )

inline

Save the current value of ref and overwrite it with vAssign.

Definition at line 35 of file ScopedValueAlternator.hpp.

~ScopedValueAlternator()

template<class T >

DNDS::ScopedValueAlternator< T >::~ScopedValueAlternator ( )

inline

Definition at line 40 of file ScopedValueAlternator.hpp.

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

• /home/runner/work/DNDSR/DNDSR/src/DNDS/CppUtils/ScopedValueAlternator.hpp