C++ Stream manipulators Input stream manipulators
Example
std::ws - consumes leading whitespaces in input stream. It different from std::skipws.
#include <sstream>
...
std::string str;
std::istringstream(" \v\n\r\t Wow!There is no whitespaces!") >> std::ws >> str;
std::cout << str;
// Output: Wow!There is no whitespaces!
std::get_money(mon[, intl]) [C++11]. In an expression in >> std::get_money(mon, intl) parses the character input as a monetary value, as specified by the std::money_get facet of the locale currently imbued in in, and stores the value in mon (of long double or std::basic_string type). Manipulator expects required international currency strings if intl is true, expects optional currency symbols otherwise.
#include <sstream>
#include <locale>
...
std::istringstream in("$1,234.56 2.22 USD 3.33");
long double v1, v2;
std::string v3;
in.imbue(std::locale("en_US.UTF-8"));
in >> std::get_money(v1) >> std::get_money(v2) >> std::get_money(v3, true);
if (in) {
std::cout << std::quoted(in.str()) << " parsed as: "
<< v1 << ", " << v2 << ", " << v3 << '\n';
}
// Output:
// "$1,234.56 2.22 USD 3.33" parsed as: 123456, 222, 333
std::get_time(tmb, fmt) [C++11] - parses a date/time value stored in tmb of specified format fmt.
tmb - valid pointer to the const std::tm* object where the result will be stored.
fmt - pointer to a null-terminated string const CharT* specifying the conversion format.
#include <sstream>
#include <locale>
...
std::tm t = {};
std::istringstream ss("2011-Februar-18 23:12:34");
ss.imbue(std::locale("de_DE.utf-8"));
ss >> std::get_time(&t, "%Y-%b-%d %H:%M:%S");
if (ss.fail()) {
std::cout << "Parse failed\n";
}
else {
std::cout << std::put_time(&t, "%c") << '\n';
}
// Possible output:
// Sun Feb 18 23:12:34 2011
For more information see the link above.
