The constructor parameter exit_func in the following constructors shall be : ‐ a reference to a function ‐ or a reference to a function object([function.objects])
Synopsis
Declared in <beman/scope/scope.hpp>
template<
typename EF,
typename CHKR>
constexpr
scope_guard(
EF&& exit_func,
CHKR&& invoke_checker) noexcept(std::is_nothrow_constructible_v<ScopeExitFunc> && std::is_nothrow_constructible_v<InvokeChecker>);Description
If EFP is not an lvalue reference type and is_nothrow_constructible_v<EF,EFP> is true, initialize exit_function with std::forward<EFP>(f); otherwise initialize exit_function with f.
scope_fail / scope_exit If the initialization of exit_function throws an exception, calls f().
scope_success [Note: If initialization of exit_function fails, f() won't be called. end note]