Scope Guard

Topics
	rwtMakeScopeGuard Functions

Classes
class	RWScopeGuard0GImp< Fun >
	Derived RWScopeGuardImp for global or static member functions that take 0 parameters. More...
class	RWScopeGuard0MImp< Obj, Fun >
	Derived RWScopeGuardImp for member functions that take 0 parameters. More...
class	RWScopeGuard1GImp< Fun, P1 >
	Derived RWScopeGuardImp for global or static member functions that take 1 parameter. More...
class	RWScopeGuard1MImp< Obj, Fun, P1 >
	Derived RWScopeGuardImp for member functions that take 1 parameter. More...
class	RWScopeGuard2GImp< Fun, P1, P2 >
	Derived RWScopeGuardImp for global or static member functions that take 2 parameters. More...
class	RWScopeGuard2MImp< Obj, Fun, P1, P2 >
	Derived RWScopeGuardImp for member functions that take 2 parameters. More...
class	RWScopeGuard3GImp< Fun, P1, P2, P3 >
	Derived RWScopeGuardImp for global or static member functions that take 3 parameters. More...
class	RWScopeGuard3MImp< Obj, Fun, P1, P2, P3 >
	Derived RWScopeGuardImp for member functions that take 3 parameters. More...
class	RWScopeGuard4GImp< Fun, P1, P2, P3, P4 >
	Derived RWScopeGuardImp for global or static member functions that take 4 parameters. More...
class	RWScopeGuard4MImp< Obj, Fun, P1, P2, P3, P4 >
	Derived RWScopeGuardImp for member functions that take 4 parameters. More...
class	RWScopeGuard5GImp< Fun, P1, P2, P3, P4, P5 >
	Derived RWScopeGuardImp for global or static member functions that take 5 parameters. More...
class	RWScopeGuard5MImp< Obj, Fun, P1, P2, P3, P4, P5 >
	Derived RWScopeGuardImp for member functions that take 5 parameters. More...
class	RWScopeGuardImp
	Base class for derived RWScopeGuardImp classes. More...

Typedefs
typedef const RWScopeGuardImp &	RWScopeGuard

Functions
template<class T >
RWTReferenceWrapper< T >	rwtMakeRef (T &t)

Detailed Description

Classes and functions in this group provide an implementation of the Resource Acquisition Is Initialization (RAII) programming idiom. This idiom is useful for writing exception-safe code. It relies on guarantees provided by the C++ language to perform an action when control flow leaves the current scope.

Typedef Documentation

RWScopeGuard

typedef const RWScopeGuardImp& RWScopeGuard

RWScopeGuard encapsulates a function to invoke and a set of parameters to pass to that function on exit from the current local scope. It can handle functions that take up to five parameters, and those parameters can be of any type.

Example

FILE* f = fopen("file.txt", "w+");
 
// close the file automatically on exit from scope
RWScopeGuard sg = rwtMakeScopeGuardG(fclose, f);
 
// some operation that might throw
potentially_dangerous_call();

If the action to be performed by the scope guard is no longer necessary, it may be canceled.

// prevent the action from being performed
sg.dismiss();

Function Documentation

rwtMakeRef()

template<class T >

RWTReferenceWrapper< T > rwtMakeRef

(

T &

t

)

Deprecated

As of SourcePro 12.5, use rwRef() instead.

Creates a wrapper around an object reference.