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============
Scope guards
============
``scope_exit``
==============
scope_exit creates an object that runs a predefined function when a scope ends.
This is useful for augmenting C APIs with something of a destructor without
wrapping the stuff in an explicit class of its own. For instance,
.. code-block:: c++
#include <libHX/option.h>
#include <libHX/scope.hpp>
int main() {
auto fa = HXformat_init();
if (fa == nullptr)
return 0;
auto cleanup_fa = HX::make_scope_exit([&]() { HXformat_free(fa); });
HXformat_add(fa, "foo", "bar", HXTYPE_STRING);
}
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