std::time_get<CharT,InputIt>::get_time, std::time_get<CharT,InputIt>::do_get_time
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(
{str}, {}, 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::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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