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ircd::util: Add scope::nominal and scope::exceptional constructs.

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This commit is contained in:
Jason Volk 2017-03-19 23:59:11 -07:00
parent 50b2942131
commit 95a52a4ab7
1 changed files with 38 additions and 21 deletions
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59
include/ircd/util.h
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@ -63,45 +63,62 @@ struct NAME \
IRCD_STRONG_TYPEDEF(TYPE, IRCD_UNIQUE(strong_t)) IRCD_STRONG_TYPEDEF(TYPE, IRCD_UNIQUE(strong_t))
template<class T>
using custom_ptr = std::unique_ptr<T, std::function<void (T *) noexcept>>;
struct scope struct scope
{ {
struct uncaught; struct nominal;
struct exceptional;
const std::function<void ()> func; const std::function<void ()> func;
template<class F> template<class F>
scope(F &&func) scope(F &&func): func(std::forward<F>(func)) {}
:func(std::forward<F>(func)) scope() = default;
{}
scope(const scope &) = delete; scope(const scope &) = delete;
scope &operator=(const scope &) = delete;
~scope() noexcept ~scope() noexcept
{ {
func(); func();
} }
}; };
struct scope::uncaught struct scope::nominal
:scope
{ {
const std::function<void ()> func;
template<class F> template<class F>
uncaught(F &&func) nominal(F &&func)
:func(std::forward<F>(func)) :scope
{}
uncaught(const uncaught &) = delete;
~uncaught() noexcept
{ {
if(unlikely(std::uncaught_exception())) [func(std::forward<F>(func))]
func(); {
} if(likely(!std::uncaught_exception()))
func();
}
}{}
nominal() = default;
}; };
struct scope::exceptional
:scope
{
template<class F>
exceptional(F &&func)
:scope
{
[func(std::forward<F>(func))]
{
if(unlikely(std::uncaught_exception()))
func();
}
}{}
exceptional() = default;
};
template<class T>
using custom_ptr = std::unique_ptr<T, std::function<void (T *) noexcept>>;
// For conforming enums include a _NUM_ as the last element, // For conforming enums include a _NUM_ as the last element,
// then num_of<my_enum>() works // then num_of<my_enum>() works