std::experimental::ranges::tagged

 

C++

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Feature test macros (C++20)

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Technical specifications

Symbols index

External libraries

 

Technical specifications

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals TS v2)

Library fundamentals 3 (library fundamentals TS v3)

Extensions for parallelism (parallelism TS)

Extensions for parallelism 2 (parallelism TS v2)

Extensions for concurrency (concurrency TS)

Extensions for concurrency 2 (concurrency TS v2)

Concepts (concepts TS)

Ranges (ranges TS)

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Mathematical special functions (special functions TR)

 

Ranges

Concepts

General utilities

Iterators

Ranges

Algorithms

 

General utilities library

Utility components
swap	exchange
Function objects
invoke identity	equal_to not_equal_to	greater less	greater_equal less_equal
Metaprogramming and type traits
is_swappable_withis_swappable	is_nothrow_swappable_withis_nothrow_swappable	common_reference common_type
Tagged pairs and tuples
TagSpecifier TaggedType	tagged tag specifiers	tagged_pair make_tagged_pair	tagged_tuple make_tagged_tuple

 

std::experimental::ranges::tagged

Member functions

tagged::tagged

tagged::operator=

tagged::swap

Named accessors

Non-member functions

ranges::swap(ranges::tagged)

Helper classes

tuple_size

tuple_element

 

Defined in header <experimental/ranges/utility>
template< class Base, TagSpecifier... Tags >     requires sizeof...(Tags) <= std::tuple_size<Base>::value struct tagged;		(ranges TS)

The class template tagged augments a tuple-like class type Base, which it publicly derives from, with a set of named accessors specified by the tag specifiers Tags.... The tags are applied in order: the i-th tag specifier in Tags... correspond to the i-th element of the tuple.

The tag specifiers in Tags... shall be unique. Otherwise, the behavior is undefined.

It is not possible to delete an instance of tagged through a pointer to any base other than Base.

Member functions

(constructor)	construct a tagged object (public member function)
operator=	assigns a tagged object (public member function)
swap	swaps the contents of two tagged objects (public member function)

Named element accessors

For the N-th tag specifier in Tags... whose corresponding element name is name, tagged provides accessors named name as follows:

constexpr decltype(auto) name() &       { return std::get<N>(*this); }
constexpr decltype(auto) name() const & { return std::get<N>(*this); }
constexpr decltype(auto) name() &&      { return std::get<N>(std::move(*this)); }

Non-member functions

ranges::swap(ranges::tagged)

specializes swap for tagged objects (function)

Tuple-like access

std::tuple_size<std::experimental::ranges::tagged>	obtains the size of a tagged (class template specialization)
std::tuple_element<std::experimental::ranges::tagged>	obtains the types of the elements of a tagged (class template specialization)

See also

TagSpecifier	specifies that a type is a tag specifier (concept)
tagged_pair	alias template for a tagged std::pair (alias template)
make_tagged_pair	convenience function for creating a tagged_pair (function template)
tagged_tuple	alias template for a tagged std::tuple (alias template)
make_tagged_tuple	convenience function for creating a tagged_tuple (function template)
inin1in2outout1out2funminmaxbeginend	tag specifiers for use with ranges::tagged (class)