transiently.hpp File Reference

Test helper to perform temporary manipulations within a test scope. More...

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Description

Test helper to perform temporary manipulations within a test scope.

Such safe manipulations can be achieved by tying the clean-up to the destructor of a token object in local scope. In the simple form, a reference to the original and the original value are captured; alternatively, both manipulation and clean-up can be given as Lambdas.

See also

TestHelper_test::checkLocalManipulation

scheduler-service-test.cpp

Definition in file transiently.hpp.

#include "lib/nocopy.hpp"
#include "lib/meta/function.hpp"
#include "lib/ppmpl.h"
#include <utility>

Namespaces
namespace	lib
	Implementation namespace for support and library code.
namespace	lib::test
	Unit tests for the Lumiera support library.

Macros
#define	TRANSIENTLY(_OO_)    lib::test::Transiently PPMPL_CAT(transientlyManipulated_,__LINE__)(_OO_); PPMPL_CAT(transientlyManipulated_,__LINE__)
	Macro to simplify capturing assignments.

Classes
class	Transiently< TAR >
	Token to capture a value and restore original when leaving scope. More...
class	Transiently< void(void)>
	Variation where manipulation is done by λ More...

Functions
template<typename FUN , typename = lib::meta::enable_if<lib::meta::has_Sig<FUN, void(void)>>>
	Transiently (FUN &&) -> Transiently< void(void)>
	deduction guide: use λ for manipulation and clean-up

Macro Definition Documentation

TRANSIENTLY

#define TRANSIENTLY

(

_OO_

)

lib::test::Transiently PPMPL_CAT(transientlyManipulated_,__LINE__)(_OO_); PPMPL_CAT(transientlyManipulated_,__LINE__)

Macro to simplify capturing assignments.

Remarks

use as TRANSIENTLY(blah) = moo;

Definition at line 121 of file transiently.hpp.