< cpp‎ | locale
Localizations library
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Defined in header <locale>

    class CharT,
    class OutputIt = std::ostreambuf_iterator<CharT>

> class money_put;

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.

cpp/locale/locale/facetstd-money put-inheritance.svg

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.


[edit] 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 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.

[edit] Member types

Member type Definition
char_type CharT
string_type std::basic_string<CharT>
iter_type OutputIt

[edit] Member functions

constructs a new money_put facet
(public member function)
invokes do_put
(public member function)

[edit] Protected member functions

destructs a money_put facet
(protected member function)
formats a monetary value and writes to output stream
(virtual protected member function) [edit]

[edit] Member objects

static std::locale::id id
id of the locale
(public member object)

[edit] Example

#include <iomanip>
#include <iostream>
#include <iterator>
#include <locale>
int main()
    // using the I/O manipulator
    std::cout << "American locale: "
               << std::showbase << std::put_money(12345678.9) << '\n';
    // using the facet directly
    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';


American locale: $123,456.79
German locale: 123.456,79 €

[edit] 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 could 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 and wchar_t, other types
are implementation-defined

[edit] See also

defines monetary formatting parameters used by std::money_get and std::money_put
(class template) [edit]
parses and constructs a monetary value from an input character sequence
(class template) [edit]
formats and outputs a monetary value
(function template) [edit]