internal::SupportsOperation Namespace Reference

Classes
struct	detector
struct	detector< Default, void_t< Op< Args... > >, Op, Args... >
struct	nonesuch_base
struct	nonesuch

Typedefs
template<class...>
using	void_t = void
template<class Default, template< class... > class Op, class... Args>
using	detected_or = detector<Default, void, Op, Args...>
template<template< class... > class Op, class... Args>
using	is_detected = typename detected_or<nonesuch, Op, Args...>::value_t
template<template< class... > class Op, class... Args>
using	detected_t = typename detected_or<nonesuch, Op, Args...>::type
template<class Default, template< class... > class Op, class... Args>
using	detected_or_t = typename detected_or<Default, Op, Args...>::type
template<class Expected, template< class... > class Op, class... Args>
using	is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>
template<class To, template< class... > class Op, class... Args>
using	is_detected_convertible

Detailed Description

A namespace used to declare the machinery for detecting whether a specific class supports an operation. This approach simulates C++20-style concepts with language standards before C++20.

Typedef Documentation

void_t

template<class...>

using internal::SupportsOperation::void_t = void

Definition at line 45 of file template_constraints.h.

detected_or

template<class Default, template< class... > class Op, class... Args>

using internal::SupportsOperation::detected_or = detector<Default, void, Op, Args...>

Definition at line 104 of file template_constraints.h.

is_detected

template<template< class... > class Op, class... Args>

using internal::SupportsOperation::is_detected = typename detected_or<nonesuch, Op, Args...>::value_t

Definition at line 107 of file template_constraints.h.

detected_t

template<template< class... > class Op, class... Args>

using internal::SupportsOperation::detected_t = typename detected_or<nonesuch, Op, Args...>::type

Definition at line 110 of file template_constraints.h.

detected_or_t

template<class Default, template< class... > class Op, class... Args>

using internal::SupportsOperation::detected_or_t = typename detected_or<Default, Op, Args...>::type

Definition at line 113 of file template_constraints.h.

is_detected_exact

template<class Expected, template< class... > class Op, class... Args>

using internal::SupportsOperation::is_detected_exact = std::is_same<Expected, detected_t<Op, Args...>>

Definition at line 116 of file template_constraints.h.

is_detected_convertible

template<class To, template< class... > class Op, class... Args>

using internal::SupportsOperation::is_detected_convertible

Initial value:

 
std::is_convertible<detected_t<Op, Args...>, To>

Definition at line 119 of file template_constraints.h.