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>
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locale-specific std::numpunct facet for narrow character I/O |
std::numpunct_byname<wchar_t>
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locale-specific std::numpunct facet for wide character I/O |
Nested types
| Type | Definition |
char_type
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CharT
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string_type
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std::basic_string<CharT>
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Member functions
constructs a new numpunct_byname facet (public member function) | |
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 );
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(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
Nested types
| Type | Definition |
char_type
|
CharT
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string_type
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std::basic_string<CharT>
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Data members
| Member | Description |
std::locale::id id [static]
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the identifier of the facet |
Member functions
invokes do_decimal_point (public member function of std::numpunct<CharT>)
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invokes do_thousands_sep (public member function of std::numpunct<CharT>)
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invokes do_grouping (public member function of std::numpunct<CharT>)
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invokes do_truename or do_falsename (public member function of std::numpunct<CharT>)
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Protected member functions
[virtual] |
provides the character to use as decimal point (virtual protected member function of std::numpunct<CharT>)
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[virtual] |
provides the character to use as thousands separator (virtual protected member function of std::numpunct<CharT>)
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[virtual] |
provides the numbers of digits between each pair of thousands separators (virtual protected member function of std::numpunct<CharT>)
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[virtual] |
provides the string to use as the name of the boolean true and false (virtual protected member function of std::numpunct<CharT>)
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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) |
