std::money_get(3)

NAME
std::money_get - std::money_get

Synopsis
   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.
   std-money get-inheritance.svg
                        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 container 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)
   get invokes do_get
                 (public member function)

Protected member functions
   destructor destructs a money_get facet
                (protected member function)
   do_get parses a monetary value from an input stream
   [virtual] (virtual protected member function)

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

Example
// Run this code
 #include <iomanip>
 #include <iostream>
 #include <iterator>
 #include <locale>
 #include <sstream>
 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
                       money_get was guaranteed to accept only guarantees to accept
                       any CharT that char,
   LWG 427 C++98 meets the requirements for a wchar_t and other
                       character on which implementation-
                       any of the iostream components can defined character types
                       be instantiated
                       only character type CharT could be can guarantee to accept
   LWG 2392 C++98 guaranteed to be accepted by implementation-
                       money_get defined character container
                        types

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