std:: numpunct_byname
|
Defined in header
<locale>
|
||
|
template
<
class
CharT
>
class numpunct_byname : public std:: numpunct < CharT > ; |
||
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 |
Nested types
| 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
)
;
|
||
|
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 ( ) ; |
||
Destroys the facet.
Inherited from std:: numpunct
Nested types
| Type | Definition |
char_type
|
CharT
|
string_type
|
std:: basic_string < CharT > |
Data members
| Member | Description |
std::locale::id
id
[static]
|
the identifier of the facet |
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>
)
|
Example
This example demonstrates how to apply numeric punctuation rules of another language without changing the rest of the locale.
#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) |