stdx::expected< T, E > Class Template Reference

#include <expected.h>

Public Types
using	value_type = T
using	error_type = E
using	unexpected_type = unexpected< E >

Public Member Functions
constexpr	expected () noexcept
constexpr	expected (const expected &other)=default
constexpr	expected (const expected &other)
constexpr	expected (expected &&other)=default
constexpr	expected (expected &&other) noexcept((std::is_nothrow_move_constructible_v< T >))
template<class U , class G , class UF = std::add_lvalue_reference_t<const U>, class GF = const G &>
constexpr	explicit (constructor_is_explicit< UF, GF >) expected(const expected< U

Public Attributes
constexpr G &	rhs: dummy_()
constexpr G	has_value_
bool	has_value_

Static Public Attributes
template<class UF , class GF >
static constexpr bool	constructor_is_explicit
template<class U , class G , class UF , class GF >
static constexpr bool	can_value_convert_construct

Member Typedef Documentation

error_type

template<class T , class E >

using stdx::expected< T, E >::error_type = E

unexpected_type

template<class T , class E >

using stdx::expected< T, E >::unexpected_type = unexpected<E>

value_type

template<class T , class E >

using stdx::expected< T, E >::value_type = T

Constructor & Destructor Documentation

expected() [1/5]

template<class T , class E >

constexpr stdx::expected< T, E >::expected ( )

inlineconstexprnoexcept

expected() [2/5]

template<class T , class E >

constexpr stdx::expected< T, E >::expected ( const expected< T, E > &  other )

constexprdefault

expected() [3/5]

template<class T , class E >

constexpr stdx::expected< T, E >::expected ( const expected< T, E > &  other )

inlineconstexpr

expected() [4/5]

template<class T , class E >

constexpr stdx::expected< T, E >::expected ( expected< T, E > &&  other )

constexprdefault

expected() [5/5]

template<class T , class E >

constexpr stdx::expected< T, E >::expected ( expected< T, E > &&  other )

inlineconstexprnoexcept

Member Function Documentation

explicit()

template<class T , class E >

template<class U , class G , class UF = std::add_lvalue_reference_t<const U>, class GF = const G &>

constexpr stdx::expected< T, E >::explicit ( constructor_is_explicit< UF, GF >  ) const

constexpr

Member Data Documentation

can_value_convert_construct

template<class T , class E >

template<class U , class G , class UF , class GF >

constexpr bool stdx::expected< T, E >::can_value_convert_construct

staticconstexpr

Initial value:

=
      (std::is_void_v<U> && std::is_constructible_v<E, GF> &&
       !std::is_constructible_v<unexpected<E>, expected<U, G> &> &&
       !std::is_constructible_v<unexpected<E>, expected<U, G>> &&
       !std::is_constructible_v<unexpected<E>, const expected<U, G> &> &&
       !std::is_constructible_v<unexpected<E>, const expected<U, G>>)

constructor_is_explicit

template<class T , class E >

template<class UF , class GF >

constexpr bool stdx::expected< T, E >::constructor_is_explicit

staticconstexpr

Initial value:

=
      (!std::is_convertible_v<UF, T> || !std::is_convertible_v<GF, E>)

has_value_ [1/2]

template<class T , class E >

constexpr G stdx::expected< T, E >::has_value_

Initial value:

{rhs.has_value()} {
    if (!rhs.has_value()) {
      std::construct_at(std::addressof(unex_), rhs.error());
    }
  }
 
  
  template <class U, class G, class UF = U, class GF = G>
  constexpr explicit(constructor_is_explicit<UF, GF>)  
      expected(expected<U, G> &&rhs)                   
    requires can_value_convert_construct<U, G, UF, GF>
      : dummy_()

has_value_ [2/2]

template<class T , class E >

bool stdx::expected< T, E >::has_value_

rhs

template<class T , class E >

constexpr G& stdx::expected< T, E >::rhs

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The documentation for this class was generated from the following file:

• router/src/harness/include/mysql/harness/stdx/expected.h