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. - Null-terminated strings - arrays of characters terminated by a special null character.
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> |
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>; template<> class char_traits<char16_t>; template<> class char_traits<char32_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 |
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