std::numpunct
From cppreference.com
Template:ddcl list begin <tr class="t-dsc-header">
<td>Defined in header
</td>
<locale>
<td></td> <td></td> </tr> <tr class="t-dcl ">
<td class="t-dcl-nopad">template< class CharT >
class numpunct;
</td>
class numpunct;
<td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> Template:ddcl list end
The facet std::numpunct encapsulates numeric punctuation preferences. Stream I/O operations use std::numpunct through std::num_get and std::num_put for parsing numeric input and formatting numeric output.
Inheritance diagram
Two specializations are provided by the standard library
| Defined in header
<locale> | |
| std::numpunct<char> | provides equivalents of the "C" locale preferences |
| std::numpunct<wchar_t> | provides wide character equivalents of the "C" locale preferences |
Contents |
Member types
| Member type | Definition |
char_type
|
charT
|
string_type
|
std::basic_string<charT> |
Member functions
Protected member functions
Member objects
| static std::locale::id id |
id of the locale (public member object) |
Example
The following example changes the string representations of true and false
Run this code
#include <iostream> #include <locale> struct french_bool : std::numpunct<char> { string_type do_truename() const { return "oui"; } string_type do_falsename() const { return "non"; } }; int main() { std::cout << "default locale: " << std::boolalpha << true << ", " << false << '\n'; std::cout.imbue(std::locale(std::cout.getloc(), new french_bool())); std::cout << "locale with modified numpunct: " << std::boolalpha << true << ", " << false << '\n'; }
Output:
default locale: true, false locale with modified numpunct: oui, non
See also
| creates a numpunct facet for the named locale (class template) |
