Trait invocation/composition. More...
Topics | |
Invocation | |
Trait invocation | |
Composition | |
Trait composition | |
lazy | |
Classes | |
struct | meta::id< T > |
A trait that always returns its argument T . It is also an invocable that always returns T . More... | |
Typedefs | |
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 > | |
using | meta::id_t = _t<id<T>> |
An alias for type T . Useful in non-deduced contexts. | |
template<typename T , template< typename... > class C> | |
using | meta::is = _t<detail::is_<T, C>> |
is | |
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::is_valid = detail::is_valid_<T> |
For testing whether a deferred computation will succeed in a let or a lambda . | |
template<typename... Ts> | |
using | meta::lambda = detail::lambda_<list<Ts...>> |
For creating anonymous Invocables. | |
template<typename... As> | |
using | meta::let = _t<_t<detail::let_<As...>>> |
A lexically scoped expression with local variables. | |
template<invocable Fn> | |
using | meta::not_fn = compose<quote<not_>, Fn> |
Logically negate the result of invocable Fn . | |
template<typename T > | |
using | meta::sizeof_ = meta::size_t<sizeof(T)> |
An alias that computes the size of the type T . | |
template<typename... > | |
using | meta::void_ = void |
An alias for void . | |
Variables | |
template<typename , template< typename... > class> | |
constexpr bool | meta::is_v = false |
is_v Test whether a type T is an instantiation of class template C . | |
Trait invocation/composition.
using meta::alignof_ = meta::size_t<alignof(T)> |
#include <meta/meta.hpp>
An alias that computes the alignment required for any instance of the type T
.
O(1)
. using meta::lambda = detail::lambda_<list<Ts...>> |
#include <meta/meta.hpp>
For creating anonymous Invocables.
#include <meta/meta.hpp>
A lexically scoped expression with local variables.
using meta::sizeof_ = meta::size_t<sizeof(T)> |