Defined in header <locale> | ||
---|---|---|
public: iter_type get_time( iter_type beg, iter_type end, std::ios_base& str, std::ios_base::iostate& err, std::tm* t) const; | (1) | |
protected: virtual iter_type get_time( iter_type beg, iter_type end, std::ios_base& str, std::ios_base::iostate& err, std::tm* t) const; | (2) |
1) public member function, calls the protected virtual member function
do_get_time
of the most derived class. 2) Reads successive characters from the sequence
[beg, end)
and parses out the time value following the same rules as the format specifier '%X' | (until C++11) |
"%H:%M:%S" | (since C++11) |
The parsed time is stored in the corresponding fields of the
std::tm
structure pointed to by the argument t
. If the end iterator is reached before a valid value is read, the function sets
std::ios_base::eofbit
in err
. If a parsing error is encountered, the function sets std::ios_base::failbit
in err
.Parameters
beg | - | iterator designating the start of the sequence to parse |
end | - | one past the end iterator for the sequence to parse |
str | - | a stream object that this function uses to obtain locale facets when needed, e.g. std::ctype to skip whitespace |
err | - | stream error flags object that is modified by this function to indicate errors |
t | - | pointer to the std::tm object that will hold the result of this function call |
Return value
Iterator pointing one past the last character in [beg, end)
that was recognized as a part of a valid date.
Notes
For the alphabetic components of the default time format (if any), this function is usually case-insensitive.
If a parsing error is encountered, most implementations of this function leave *t
unmodified.
Example
#include <iostream> #include <locale> #include <sstream> #include <iterator> void try_get_time(const std::string& s) { std::cout << "Parsing the time out of '" << s << "' in the locale " << std::locale().name() << '\n'; std::istringstream str(s); std::ios_base::iostate err = std::ios_base::goodbit; std::tm t; std::istreambuf_iterator<char> ret = std::use_facet<std::time_get<char>>(str.getloc()).get_time( std::istreambuf_iterator<char>(str), std::istreambuf_iterator<char>(), str, err, &t ); str.setstate(err); if(str) { std::cout << "Hours: " << t.tm_hour << ' ' << "Minutes: " << t.tm_min << ' ' << "Seconds: " << t.tm_sec << '\n'; } else { std::cout << "Parse failed. Unparsed string: "; std::copy(ret, std::istreambuf_iterator<char>(), std::ostreambuf_iterator<char>(std::cout)); std::cout << '\n'; } } int main() { std::locale::global(std::locale("ru_RU.utf8")); try_get_time("21:40:11"); try_get_time("21-40-11"); std::locale::global(std::locale("ja_JP.utf8")); try_get_time("21時37分58秒"); }
Output:
Parsing the time out of '21:40:11' in the locale ru_RU.utf8 Hours: 21 Minutes: 40 Seconds: 11 Parsing the time out of '21-40-11' in the locale ru_RU.utf8 Parse failed. Unparsed string: -40-11 Parsing the time out of '21時37分58秒' in the locale ja_JP.utf8 Hours: 21 Minutes: 37 Seconds: 58
See also
(C++11) | parses a date/time value of specified format (function template) |
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