Create a ScopeExit that will invoke function on destruction.

Synopsis

Declared in <bdlb_scopeexit.h>

template<class EXIT_FUNC_PARAM>
explicit
ScopeExit(EXIT_FUNC_PARAM&& function)
requires bsl::is_constructible<  // Copy construct
            EXIT_FUNC,
            const typename MoveUtil::Decay<EXIT_FUNC_PARAM>::type&
        >::value                                                             ||
        bsl::is_constructible<  // Move construct
            EXIT_FUNC,
            bslmf::MovableRef<typename MoveUtil::Decay<EXIT_FUNC_PARAM>::type>
        >::value;

Description

Create a ScopeExit object, which, upon its destruction will invoke the specified function (or functor) unless its release method was called. If function is copied into the EXIT_FUNC member, and that copy throws an exception, invoke function and rethrow the exception. If EXIT_FUNC_PARAM cannot be move converted to EXIT_FUNC via no‐throw means (either because such conversion does not exist or it is not marked as non‐throwing), function will always be copied into the member. This constructor participates in overload resolution only if EXIT_FUNC_PARAM is neither EXIT_FUNC nor bdlb::ScopeExit<EXIT_FUNC> and EXIT_FUNC_PARAM is convertible to EXIT_FUNC. The behavior is undefined if function or the member instance of EXIT_FUNC throws an exception upon invocation.

Parameters

Name

Description

function

exit function or functor invoked on destruction unless release is called

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