std::experimental::basic_string_view

 

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Technical Specifications

 

Technical specifications

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals 2 TS)

Extensions for parallelism (parallelism TS)

Extensions for parallelism 2 (parallelism TS v2)

Extensions for concurrency (concurrency TS)

Concepts (concepts TS)

Ranges (ranges TS)

Special mathematical functions (special math TR)

 

Library fundamentals

experimental::optional

experimental::any

experimental::basic_string_view

experimental::sample

experimental::shared_ptr

experimental::weak_ptr

experimental::apply

experimental::invocation_type experimental::raw_invocation_type

experimental::search

experimental::default_searcher experimental::make_default_searcher

experimental::boyer_moore_searcher experimental::make_boyer_moore_searcher

experimental::boyer_moore_horspool_searcher experimental::make_boyer_moore_horspool_searcher

type-erased and polymorphic allocators

variable templates for type traits

 

std::experimental::basic_string_view

Member functions basic_string_view::basic_string_view basic_string_view::operator= Iterators basic_string_view::beginbasic_string_view::cbegin basic_string_view::endbasic_string_view::cend basic_string_view::rbeginbasic_string_view::crbegin basic_string_view::rendbasic_string_view::crend Element access basic_string_view::at basic_string_view::operator[] basic_string_view::front basic_string_view::back basic_string_view::data Capacity basic_string_view::sizebasic_string_view::length basic_string_view::max_size basic_string_view::empty Modifiers basic_string_view::remove_prefix basic_string_view::remove_suffix basic_string_view::swap

Operations basic_string_view::to_stringbasic_string_view::operator basic_string basic_string_view::copy basic_string_view::substr basic_string_view::compare basic_string_view::find basic_string_view::rfind basic_string_view::find_first_of basic_string_view::find_last_of basic_string_view::find_first_not_of basic_string_view::find_last_not_of Constants basic_string_view::npos Non-member functions operator==operator!=operator<operator>operator<=operator>= operator<< Helper classes hash<std::string_view>hash<std::wstring_view>hash<std::u16string_view>hash<std::u32string_view>

 

Defined in header <experimental/string_view>
template<     class CharT,     class Traits = std::char_traits<CharT> > class basic_string_view;		(library fundamentals TS)

The class template basic_string_view describes an object that can refer to a constant contiguous sequence of char-like objects with the first element of the sequence at position zero.

A typical implementation holds only two members: a pointer to constant CharT and a size.

Several typedefs for common character types are provided:

Defined in header <experimental/string_view>
Type	Definition
std::experimental::string_view	std::experimental::basic_string_view<char>
std::experimental::wstring_view	std::experimental::basic_string_view<wchar_t>
std::experimental::u16string_view	std::experimental::basic_string_view<char16_t>
std::experimental::u32string_view	std::experimental::basic_string_view<char32_t>

Template parameters

CharT	-	character type
Traits	-	traits class specifying the operations on the character type

Member types

Member type	Definition
traits_type	Traits
value_type	CharT
pointer	CharT*
const_pointer	const CharT*
reference	CharT&
const_reference	const CharT&
const_iterator	implementation-defined LegacyRandomAccessIterator
iterator	const_iterator
reverse_iterator	const_reverse_iterator
const_reverse_iterator	std::reverse_iterator<const_iterator>
size_type	std::size_t
difference_type	std::ptrdiff_t

Note: iterator and const_iterator are the same type because string views are views into constant character sequences.

Member functions

(constructor)	constructs a basic_string_view (public member function)
operator=	assigns a view (public member function)
Iterators
begincbegin	returns an iterator to the beginning (public member function)
endcend	returns an iterator to the end (public member function)
rbegincrbegin	returns a reverse iterator to the beginning (public member function)
rendcrend	returns a reverse iterator to the end (public member function)
Element access
operator[]	access specified character (public member function)
at	access specified character with bounds checking (public member function)
front	accesses the first character (public member function)
back	accesses the last character (public member function)
data	returns a pointer to the first character of a view (public member function)
Capacity
sizelength	returns the number of characters (public member function)
max_size	returns the maximum number of characters (public member function)
empty	checks whether the view is empty (public member function)
Modifiers
remove_prefix	Shrinks the view by moving its start forward (public member function)
remove_suffix	Shrinks the view by moving its end backward (public member function)
swap	swaps the contents (public member function)
Operations
to_stringoperator basic_string	creates a string from the view (public member function)
copy	copies characters (public member function)
substr	returns a substring (public member function)
compare	compares two views (public member function)
find	find characters in the view (public member function)
rfind	find the last occurrence of a substring (public member function)
find_first_of	find first occurrence of characters (public member function)
find_last_of	find last occurrence of characters (public member function)
find_first_not_of	find first absence of characters (public member function)
find_last_not_of	find last absence of characters (public member function)
Constants
npos [static]	special value. The exact meaning depends on the context (public static member constant)

Non-member functions

operator==operator!=operator<operator>operator<=operator>=	lexicographically compares two views (function template)
Input/output
operator<<	performs stream output on views (function template)

Helper classes

std::hash<std::experimental::string_view>std::hash<std::experimental::wstring_view>std::hash<std::experimental::u16string_view>std::hash<std::experimental::u32string_view>

hash support for views (class template specialization)

Feature test macros

__cpp_lib_experimental_string_view

a value of at least 201411 indicates that basic_string_view template is supported (macro constant)