std::numpunct_byname
From cppreference.com
| Defined in header <locale>
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| template< class CharT > class numpunct_byname : public std::numpunct<CharT>; |
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std::numpunct_byname is a std::numpunct facet which encapsulates numeric punctuation preferences of a locale specified at its construction.
Specializations
The standard library is guaranteed to provide the following specializations:
| Defined in header
<locale> | |
| std::numpunct_byname<char> | locale-specific std::numpunct facet for narrow character I/O |
| std::numpunct_byname<wchar_t> | locale-specific std::numpunct facet for wide character I/O |
Member types
| Member type | Definition |
char_type
|
CharT
|
string_type
|
std::basic_string<CharT> |
Member functions
| (constructor) |
constructs a new numpunct_byname facet (public member function) |
| (destructor) |
destroys a numpunct_byname facet (protected member function) |
std::numpunct_byname::numpunct_byname
| explicit numpunct_byname( const char* name, std::size_t refs = 0 ); |
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| explicit numpunct_byname( const std::string& name, std::size_t refs = 0 ); |
(since C++11) | |
Constructs a new std::numpunct_byname facet for a locale with name.
refs is used for resource management: if refs == 0, the implementation destroys the facet, when the last std::locale object holding it is destroyed. Otherwise, the object is not destroyed.
Parameters
| name | - | the name of the locale |
| refs | - | the number of references that link to the facet |
std::numpunct_byname::~numpunct_byname
| protected: ~numpunct_byname(); |
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Destroys the facet.
Inherited from std::numpunct
Member types
| Member type | Definition |
char_type
|
CharT
|
string_type
|
std::basic_string<CharT> |
Member functions
invokes do_decimal_point (public member function of std::numpunct<CharT>) | |
invokes do_thousands_sep (public member function of std::numpunct<CharT>) | |
invokes do_grouping (public member function of std::numpunct<CharT>) | |
invokes do_truename or do_falsename (public member function of std::numpunct<CharT>) |
Protected member functions
| [virtual] |
provides the character to use as decimal point (virtual protected member function of std::numpunct<CharT>) |
| [virtual] |
provides the character to use as thousands separator (virtual protected member function of std::numpunct<CharT>) |
| [virtual] |
provides the numbers of digits between each pair of thousands separators (virtual protected member function of std::numpunct<CharT>) |
| [virtual] |
provides the string to use as the name of the boolean true and false (virtual protected member function of std::numpunct<CharT>) |
Member objects
| static std::locale::id id |
id of the locale (public member object) |
Example
This example demonstrates how to apply numeric punctuation rules of another language without changing the rest of the locale.
Run this code
#include <iostream> #include <locale> int main() { const double number = 1000.25; std::wcout << L"default locale: " << number << L'\n'; std::wcout.imbue(std::locale(std::wcout.getloc(), new std::numpunct_byname<wchar_t>("ru_RU.UTF8"))); std::wcout << L"default locale with russian numpunct: " << number << L'\n'; }
Output:
default locale: 1000.25 default locale with russian numpunct: 1 000,25
See also
| defines numeric punctuation rules (class template) |