defer.hpp File Reference

#include <helios/compiler/compiler.hpp>
#include <helios/utils/macro.hpp>
#include <concepts>
#include <type_traits>
#include <utility>

Go to the source code of this file.

Classes
class	helios::utils::Defer< F >
	A utility class that defers the execution of a callable until the object goes out of scope. More...
struct	helios::utils::details::DeferHelper
	Helper struct for the HELIOS_DEFER macro to enable inline lambda syntax. More...

Namespaces
namespace	helios
namespace	helios::utils
namespace	helios::utils::details

Macros
#define	HELIOS_DEFER
	Defers execution of an inline lambda until the end of the current scope.
#define	HELIOS_DEFER_CALL(callable)
	Defers execution of a callable until the end of the current scope.

Macro Definition Documentation

HELIOS_DEFER

#define HELIOS_DEFER

Value:

const auto HELIOS_CONCAT(_defer_, __COUNTER__) = \
    ::helios::utils::details::DeferHelper() + [&] HELIOS_ALWAYS_INLINE()

Defers execution of an inline lambda until the end of the current scope.

The lambda is written directly after the macro without explicit capture list.

int* ptr = new int(42);
HELIOS_DEFER {
  delete ptr;
};

Definition at line 82 of file defer.hpp.

HELIOS_DEFER_CALL

#define HELIOS_DEFER_CALL

(

callable

)

Value:

const auto HELIOS_CONCAT(_defer_, __COUNTER__) = \
    ::helios::utils::Defer(callable)

Defers execution of a callable until the end of the current scope.

Accepts lambdas, functors, function pointers, and std::function objects.

auto cleanup = []() { std::cout << "Cleanup\n"; };
HELIOS_DEFER_CALL(cleanup);

Definition at line 98 of file defer.hpp.