Defined in header <locale> | ||
---|---|---|
public: string_type curr_symbol() const; | (1) | |
protected: virtual string_type do_curr_symbol() const; | (2) |
do_curr_symbol
of the most derived class.International
(the second template parameter of std::moneypunct
) is false
, the identifier is usually a single (wide) character, such as "¥"
or "$"
. If International
is true
, the identifier is usually a four-character string holding the three-character ISO 4217 currency code followed by a space ("JPY "
or "USD "
).The object of type string_type
holding the currency symbol or code.
#include <iostream> #include <locale> void show_ccy(const char* locname) { std::locale loc(locname); std::cout << locname << " currency symbol is " << std::use_facet<std::moneypunct<char, true>>(loc).curr_symbol() << "or " << std::use_facet<std::moneypunct<char>>(loc).curr_symbol() << " for short\n"; } int main() { show_ccy("en_US.utf8"); show_ccy("ja_JP.utf8"); show_ccy("sv_SE.utf8"); show_ccy("ru_RU.utf8"); show_ccy("vi_VN.utf8"); }
Output:
en_US.utf8 currency symbol is USD or $ for short ja_JP.utf8 currency symbol is JPY or ¥ for short sv_SE.utf8 currency symbol is SEK or kr for short ru_RU.utf8 currency symbol is RUB or руб for short vi_VN.utf8 currency symbol is VND or ₫ for short
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR | Applied to | Behavior as published | Correct behavior |
---|---|---|---|
LWG 666 | C++98 | the length of the identifier string was required to be 4 if International is true | not required |
[virtual] | provides the formatting pattern for currency values (virtual protected member function) |
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