std::money_get

Defined in header `<locale>`
template< class CharT, class InputIt = std::istreambuf_iterator<CharT> > class money_get;

Class template std::money_get encapsulates the rules for parsing monetary values from character streams. The standard I/O manipulator std::get_money uses the std::money_get facet of the I/O stream's locale.

Inheritance diagram

If a std::money_get specialization is not guaranteed to be provided by the standard library (see below), the behaviors of its get() and do_get() 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_get<char>	parses narrow string representations of monetary values
std::money_get<wchar_t>	parses 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
InputIt must meet the requirements of LegacyInputIterator.

Member types

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

Member functions

(constructor)	constructs a new `money_get` facet (public member function)
(destructor)	destructs a `money_get` facet (protected member function)
get	invokes `do_get` (public member function)

Protected member functions

do_get

[virtual]

parses a monetary value from an input stream
(virtual protected member function)

Member objects

static std::locale::id id

id of the locale
(public member object)

Example

Run this code

#include <iostream>
#include <sstream>
#include <locale>
#include <iomanip>
#include <iterator>
 
int main()
{
    std::string str = "$1.11 $2.22 $3.33";
    std::cout << std::fixed << std::setprecision(2);
 
    std::cout << '"' << str << "\" parsed with the I/O manipulator: ";
    std::istringstream s1(str);
    s1.imbue(std::locale("en_US.UTF-8"));
 
    long double val;
    while (s1 >> std::get_money(val))
        std::cout << val / 100 << ' ';
    std::cout << '\n';
 
    str = "USD  1,234.56";
    std::cout << '"' << str << "\" parsed with the facet directly: ";
    std::istringstream s2(str);
    s2.imbue(std::locale("en_US.UTF-8"));
 
    auto& f = std::use_facet<std::money_get<char>>(s2.getloc());
    std::ios_base::iostate err;
    std::istreambuf_iterator<char> beg(s2), end;
    f.get(beg, end, true, s2, err, val);
 
    std::cout << val / 100 << '\n';
}

Output:

"$1.11 $2.22 $3.33" parsed with the I/O manipulator: 1.11 2.22 3.33
"USD  1,234.56" parsed with the facet directly: 1234.56

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_get` 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

Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros (C++20)
Language support library
Concepts library (C++20)
Metaprogramming library (C++11)
Diagnostics library
General utilities library
Strings library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Numerics library
Localizations library
Input/output library
Filesystem library (C++17)
Regular expressions library (C++11)
Concurrency support library (C++11)
Technical specifications
Symbols index
External libraries

Member functions
money_get::money_get
money_get::~money_get
money_get::getmoney_get::do_get

moneypunct	defines monetary formatting parameters used by std::money_get and std::money_put (class template)
money_put	formats a monetary value for output as a character sequence (class template)
get_money (C++11)	parses a monetary value (function template)