std::codecvt::unshift, do_unshift
From cppreference.com
| Defined in header <locale>
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| public: result unshift( StateT& state, |
(1) | |
| protected: virtual result do_unshift( StateT& state, |
(2) | |
1) public member function, calls the member function
do_unshift of the most derived class.2) if the encoding represented by this
codecvt facet is state-dependent, and state represents a conversion state that is not the initial shift state, writes the characters necessary to return to the initial shift state. The characters are written to a character array whose first element is pointed to by to. No more than to_end-to characters are written. The parameter to_next is updated to point one past the last character written.Return value
A value of type std::codecvt_base::result, indicating the success status as follows:
ok
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all necessary characters were written. state now represents initial shift state
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partial
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not enough space in the output buffer. to_next == to_end |
error
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unspecified error occurred |
noconv
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the encoding is not state-dependent, no termination sequence necessary |
The non-converting specialization std::codecvt<char, char, std::mbstate_t> always returns std::codecvt_base::noconv
Notes
This function is called by std::basic_filebuf::close() and in other situations when finalizing a state-dependent multibyte character sequence.
Example
| This section is incomplete Reason: no example |
See also
| converts a wide character to its multibyte representation, given state (function) | |
| [virtual] |
converts a string from internT to externT, such as when writing to file (virtual protected member function) |