std::time_put<CharT,OutputIt>::put, std::time_put<CharT,OutputIt>::do_put
Defined in header <locale> | ||
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public:
iter_type put( iter_type out, std::ios_base& str,
char_type fill, const std::tm* t,
const CharT* fmtbeg, const CharT* fmtend ) const;
| (1) | |
public:
iter_type put( iter_type out, std::ios_base& str,
char_type fill, const std::tm* t,
char format, char modifier = 0 ) const;
| (2) | |
protected:
virtual iter_type do_put( iter_type out, std::ios_base& str,
char_type fill, const std::tm* t,
char format, char modifier ) const;
| (3) |
Converts the calendar date and time stored in the std::tm object pointed to by t into a character string, according to the format string [fmtbeg, fmtend). The format string is the same as used by std::srtftime, but each format specifier is processed by an individual call to do_put(), which can be customized by extending this facet.
1) Steps through the character sequence
[fmtbeg, fmtend), examining the characters. Every character that is not a part of a format sequence is written to the output iterator out immediately. To identify format sequences, this function narrows the next character c in [fmtbeg, fmtend) as if by std::ctype<char_type>(str.getloc()).narrow(c,0) and if it equals '%', the next one or two characters are compared to the list of format sequences recognized by std::strftime plus any additional implementation-defined formats supported by this locale. For each valid format sequence, a call to do_put(out, str, fill, t, format, modifier) is made, where format is the format sequence character, and modifier is the optional format sequence modifier ('E' or 'O'). A value of '\0' is used if the modifier is absent.
2) Calls the
do_put member function of the most derived class.
3) Converts the calendar date and time stored in the
std::tm object pointed to by t into a character string, according to the format conversion sequence formed by concatenating '%', the value of modifier if not '\0', and the value of format. The format is interpreted the same way as the function std::strftime, except that the formats that are described as locale-dependent are defined by this locale, and additional format specifiers may be supported (the fill argument is provided for these implementation-defined format specifiers to use). The string is written to the output iterator out.Parameters
| out | - | output iterator where the result of the conversion is written | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| str | - | a stream object that this function uses to obtain locale facets when needed, e.g. std::ctype to narrow characters |
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| t | - | pointer to the std::tm object from which the date/time values are obtained |
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| fmtbeg | - | pointer to the first character of a sequence of char_type characters specifying the conversion format The format string consists of zero or more conversion specifiers and ordinary characters (except
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| fmtend | - | pointer one past the last character of a sequence of char_type characters specifying the conversion format | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| fill | - | fill character (usually space) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| format | - | the character that names a conversion specifier | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| modifier | - | the optional modifier that may appear between % and the conversion specifier |
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Return value
Iterator pointing one past the last character that was produced .
Notes
No error handling is provided.
The fill character is provided for those implementation-defined format specifiers and for the user-defined overrides of do_put() that use padding and filling logic. Such implementations typically make use of the formatting flags from str.
Example
#include <iostream>
#include <sstream>
#include <iomanip>
#include <ctime>
void try_time_put(const std::tm* t, const std::string& fmt)
{
std::cout.imbue(std::locale());
std::cout << "In the locale '" << std::cout.getloc().name() << "' : '";
std::use_facet<std::time_put<char>>(std::cout.getloc()).put(
{std::cout}, std::cout, ' ', t, &fmt[0], &fmt[0] + fmt.size());
std::cout << "'\n";
}
int main()
{
std::time_t t = std::time(NULL);
std::tm tm = *std::localtime(&t);
std::string fmt = "%c";
std::cout << "Using the format string '" << fmt
<< "' to format the time: " << std::ctime(&t) << '\n';
std::locale::global(std::locale("de_DE.utf8"));
try_time_put(&tm, fmt);
std::locale::global(std::locale("el_GR.utf8"));
try_time_put(&tm, fmt);
std::locale::global(std::locale("ja_JP.utf8"));
try_time_put(&tm, fmt);
}Output:
Using the format string '%c' to format the time: Mon Feb 11 22:58:50 2013 In the locale 'de_DE.utf8' : 'Mo 11 Feb 2013 23:02:38 EST' In the locale 'el_GR.utf8' : 'Δευ 11 Φεβ 2013 11:02:38 μμ EST' In the locale 'ja_JP.utf8' : '2013年02月11日 23時02分38秒'
See also
|
(C++11) | formats and outputs a date/time value according to the specified format (function template) |
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[virtual] (C++11) | extracts date/time components from input stream, according to the specified format (virtual protected member function of std::time_get<CharT,InputIt>) |
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