Difference between revisions of "cpp/string"
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| + | ====Conversions and classification==== | ||
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| + | The [[cpp/locale|localizations library]] provides support for string conversions (e.g. {{c|std::wstring_convert}} or {{c|std::toupper}}) as well as functions that classify characters (e.g. {{c|std::isspace}} or {{c|std::isdigit}}). | ||
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| + | {{dsc see cpp | cpp/locale | Localizations library}} | ||
{{dsc see c | c/string | Strings library}} | {{dsc see c | c/string | Strings library}} | ||
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Revision as of 11:33, 30 November 2015
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.
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> |
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) |
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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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