std:: money_put
Defined in header
<locale>
|
||
template
<
class
CharT,
|
||
Class
std::money_put
encapsulates the rules for formatting monetary values as strings. The standard I/O manipulator
std::put_money
uses the
std::money_put
facet of the I/O stream's locale.
Inheritance diagram
If a
std::money_put
specialization is not guaranteed to be provided by the standard library (see below), the behaviors of its
put()
and
do_put()
are not guaranteed as specified.
Specializations
The standard library is guaranteed to provide the following specializations (they are required to be implemented by any locale object ):
Defined in header
<locale>
|
|
std :: money_put < char > | creates narrow string representations of monetary values |
std :: money_put < wchar_t > | creates wide string representations of monetary values |
In addition, the standard library is also guaranteed to provide every specialization that satisfies the following type requirements:
-
CharT
is one of- char ,
- wchar_t , and
- any other implementation-defined character container type that meets the requirements for a character on which any of the iostream components can be instantiated; and
-
OutputIt
must meet the requirements of LegacyOutputIterator .
Nested types
Type | Definition |
char_type
|
CharT
|
string_type
|
std:: basic_string < CharT > |
iter_type
|
OutputIt
|
Data members
Member | Description |
std::locale::id
id
[static]
|
the identifier of the facet |
Member functions
constructs a new
money_put
facet
(public member function) |
|
invokes
do_put
(public member function) |
Protected member functions
destructs a
money_put
facet
(protected member function) |
|
[virtual]
|
formats a monetary value and writes to output stream
(virtual protected member function) |
Example
#include <iomanip> #include <iostream> #include <iterator> #include <locale> int main() { // using the I/O manipulator std::cout.imbue(std::locale("en_US.UTF-8")); std::cout << "American locale: " << std::showbase << std::put_money(12345678.9) << '\n'; // using the facet directly std::cout.imbue(std::locale("de_DE.UTF-8")); std::cout << "German locale: "; auto& f = std::use_facet<std::money_put<char>>(std::cout.getloc()); f.put({std::cout}, false, std::cout, std::cout.fill(), 12345678.9); std::cout << '\n'; }
Output:
American locale: $123,456.79 German locale: 123.456,79 €
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR | Applied to | Behavior as published | Correct behavior |
---|---|---|---|
LWG 427 | C++98 |
money_put
was guaranteed to accept any
CharT
that
meets the requirements for a character on which any of the iostream components can be instantiated |
only guarantees to accept
char
,
wchar_t and other implementation- defined character types |
LWG 2392 | C++98 |
only character type
CharT
could be
guaranteed to be accepted by
money_put
|
can guarantee to accept implementation-
defined character container types |
See also
defines monetary formatting parameters used by
std::money_get
and
std::money_put
(class template) |
|
parses and constructs a monetary value from an input character sequence
(class template) |
|
(C++11)
|
formats and outputs a monetary value
(function template) |