Difference between revisions of "cpp/locale/numpunct"
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Revision as of 13:24, 15 June 2012
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<td>Defined in header
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<locale>
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<td class="t-dcl-nopad">template< class charT >
class numpunct : public std::locale::facet;
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class numpunct : public std::locale::facet;
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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.
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 objects
| Member name | Type |
id (static)
|
std::locale::id |
Member functions
Protected member functions
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) |
