std::moneypunct::pos_format, do_pos_format, neg_format, do_neg_format
From cppreference.com
< cpp | locale | moneypunct
| Defined in header <locale>
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| public: pattern pos_format() const; |
(1) | |
| public: pattern neg_format() const; |
(2) | |
| protected: virtual pattern do_pos_format() const; |
(3) | |
| protected: virtual pattern do_neg_format() const; |
(4) | |
1) Public member function, calls the member function
do_pos_format of the most derived class.2) Public member function, calls the member function
do_neg_format of the most derived class.3) Returns the format structure (of type std::money_base::format) which describes the formatting of positive monetary values.
4) Returns the format structure (of type std::money_base::format) which describes the formatting of negative monetary values.
The standard specializations of std::moneypunct return the pattern {symbol, sign, none, value}
Return value
The object of type std::money_base::format describing the formatting used by this locale.
Notes
While std::money_put uses pos_format for formatting positive values and neg_format for formatting negative values, std::money_get uses neg_format for parsing all monetary values: it assumes that neg_format is compatible with pos_format.
Example
Run this code
#include <locale> #include <iostream> #include <iomanip> struct my_punct : std::moneypunct_byname<char, false> { my_punct(const char* name) : moneypunct_byname(name) {} pattern do_pos_format() const { return { {value, space, symbol, sign} };} pattern do_neg_format() const { return { {value, space, symbol, sign} };} }; int main() { std::cout.imbue(std::locale("en_US.utf8")); std::cout << "american locale: " << std::showbase << std::put_money(12345678.0) << '\n'; std::cout.imbue(std::locale(std::cout.getloc(), new my_punct("en_US.utf8"))); std::cout << "locale with modified moneypunct:\n" << std::put_money(12345678.0) << '\n' << std::put_money(-12345678.0) << '\n'; }
Output:
american locale: $123,456.78 locale with modified moneypunct: 123,456.78 $ 123,456.78 $-
See also
| [virtual] |
provides the string to use as the currency identifier (virtual protected member function) |
| [virtual] |
provides the string to indicate a positive or negative value (virtual protected member function) |
| [virtual] |
parses a monetary value from an input stream (virtual protected member function of std::money_get) |
| [virtual] |
formats a monetary value and writes to output stream (virtual protected member function of std::money_put) |