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I don't remember exactly why I made these bits of code reserve space in a COW string and append to it, rather than just use the string returned from std::format (which will undergo copy elision). The _Str_sink type used by std::format means the string only performs a single allocation for the formatted output, and the returned string's reference count will be one, so won't reallocate when indexing into it. We can remove these non-optimizations. libstdc++-v3/ChangeLog: * include/bits/chrono_io.h (__formatter_chrono::_M_F): Simplify handling of string returned from std::format. (__formatter_chrono::_M_R_T): Likewise. |
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| ChangeLog | ||
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| config.h.in | ||
| configure | ||
| configure.ac | ||
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| linkage.m4 | ||
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| README | ||
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.