Horizon
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Trait invocation/composition. More...
Modules | |
Invocation | |
Trait invocation. | |
Composition | |
Trait composition. | |
lazy | |
Classes | |
struct | meta::id< T > |
A trait that always returns its argument T . More... | |
Typedefs | |
template<typename T > | |
using | meta::id_t = _t< id< T > > |
An alias for type T . | |
template<typename... > | |
using | meta::void_ = void |
An alias for void . | |
template<typename T > | |
using | meta::is_callable = _t< detail::is_callable_< T > > |
An alias for std::true_type if T::invoke exists and names a class template or alias template; otherwise, it's an alias for std::false_type . | |
template<typename T > | |
using | meta::sizeof_ = meta::size_t< sizeof(T)> |
An alias that computes the size of the type T . | |
template<typename T > | |
using | meta::alignof_ = meta::size_t< alignof(T)> |
An alias that computes the alignment required for any instance of the type T . | |
template<typename T , template< typename... > class C> | |
using | meta::is = _t< detail::is_< T, C > > |
is | |
template<META_TYPE_CONSTRAINT(invocable) Fn> | |
using | meta::not_fn = compose< quote< not_ >, Fn > |
Logically negate the result of invocable Fn . | |
template<typename... Ts> | |
using | meta::lambda = if_c<(sizeof...(Ts) > 0), detail::lambda_< list< Ts... > > > |
For creating anonymous Invocables. | |
template<typename T > | |
using | meta::is_valid = detail::is_valid_< T > |
For testing whether a deferred computation will succeed in a let or a lambda . | |
template<typename... As> | |
using | meta::let = _t< _t< detail::let_< As... > > > |
A lexically scoped expression with local variables. | |
Trait invocation/composition.
using meta::alignof_ = typedef meta::size_t<alignof(T)> |
An alias that computes the alignment required for any instance of the type T
.
O(1)
. using meta::id_t = typedef _t<id<T> > |
An alias for type T
.
Useful in non-deduced contexts.
using meta::is = typedef _t<detail::is_<T, C> > |
is
Test whether a type T
is an instantiation of class template C
.
using meta::lambda = typedef if_c<(sizeof...(Ts) > 0), detail::lambda_<list<Ts...> >> |
For creating anonymous Invocables.
A lexically scoped expression with local variables.
using meta::sizeof_ = typedef meta::size_t<sizeof(T)> |
An alias that computes the size of the type T
.
O(1)
.