Difference between revisions of "cpp/string"
(add a few links to localization stuff, which does string conversions) |
(starting on string_view) |
||
| Line 5: | Line 5: | ||
* {{lc|std::basic_string}} - a templated class designed to manipulate strings of any character type. | * {{lc|std::basic_string}} - a templated class designed to manipulate strings of any character type. | ||
| + | * {{lc|std::basic_string_view}}{{mark c++17}} - a lightweight non-owning read-only view into a subsequence of a string. | ||
* Null-terminated strings - arrays of characters terminated by a special ''null'' character. | * Null-terminated strings - arrays of characters terminated by a special ''null'' character. | ||
| Line 22: | Line 23: | ||
{{dsc end}} | {{dsc end}} | ||
| + | {{rev begin}} | ||
| + | {{rev|since=c++17| | ||
| + | === {{ltt|cpp/string/basic_string_view|std::basic_string_view}} === | ||
| + | |||
| + | The templated class {{lc|std::basic_string_view}} provides a lightweight object that offers read-only access to a string or a part of a string using an interface similar to the interface of {{lc|std::basic_string}}. | ||
| + | |||
| + | Several specializations of {{lc|std::basic_string_view}} are provided for commonly-used types: | ||
| + | |||
| + | {{dsc begin}} | ||
| + | {{dsc header | string}} | ||
| + | {{dsc hitem | Type | Definition}} | ||
| + | {{dsc | {{lc|std::string_view}} | {{c|std::basic_string_view<char>}} | notes={{mark since c++17}}}} | ||
| + | {{dsc | {{lc|std::wstring_view}} | {{c|std::basic_string_view<wchar_t>}} | notes={{mark since c++17}}}} | ||
| + | {{dsc | {{lc|std::u16string_view}} | {{c|std::basic_string_view<char16_t>}} | notes={{mark since c++17}}}} | ||
| + | {{dsc | {{lc|std::u32string_view}} | {{c|std::basic_string_view<char32_t>}} | notes={{mark since c++17}}}} | ||
| + | {{dsc end}} | ||
| + | }} | ||
| + | {{rev end}} | ||
=== Null-terminated strings === | === Null-terminated strings === | ||
Revision as of 14:45, 17 March 2016
The C++ strings library includes support for two general types of strings:
- std::basic_string - a templated class designed to manipulate strings of any character type.
- std::basic_string_view(C++17) - a lightweight non-owning read-only view into a subsequence of a string.
- Null-terminated strings - arrays of characters terminated by a special null character.
Contents |
std::basic_string
The templated class std::basic_string generalizes how sequences of characters are manipulated and stored. String creation, manipulation, and destruction are all handled by a convenient set of class methods and related functions.
Several specializations of std::basic_string are provided for commonly-used types:
| Defined in header
<string> | |
| Type | Definition |
| std::string | std::basic_string<char> |
| std::wstring | std::basic_string<wchar_t> |
| std::u16string | std::basic_string<char16_t> |
| std::u32string | std::basic_string<char32_t> |
std::basic_string_viewThe templated class std::basic_string_view provides a lightweight object that offers read-only access to a string or a part of a string using an interface similar to the interface of std::basic_string. Several specializations of std::basic_string_view are provided for commonly-used types:
|
(since C++17) | ||||||||||||
Null-terminated strings
Null-terminated strings are arrays of characters that are terminated by a special null character. C++ provides functions to create, inspect, and modify null-terminated strings.
There are three types of null-terminated strings:
Additional support
std::char_traits
The string library also provides class template std::char_traits that defines types and functions for std::basic_string. The following specializations are defined:
| Defined in header <string>
|
||
| template<> class char_traits<char>; template<> class char_traits<wchar_t>; |
(since C++11) (since C++11) |
|
Conversions and classification
The localizations library provides support for string conversions (e.g. std::wstring_convert or std::toupper) as well as functions that classify characters (e.g. std::isspace or std::isdigit).
See also
| C++ documentation for Localizations library
| |
| C documentation for Strings library
|
