5fbc1b2e7c
I seem to have implemented this feature based on the P2918R0 revision, not the final P2918R2 one that was approved for C++26. This commit fixes it. The runtime-format-string type should not have a publicly accessible data member, so add a constructor and make it a friend of basic_format_string. It should also be non-copyable, so that it can only be constructed from a prvalue via temporary materialization. Change the basic_format_string constructor parameter to pass by value. Also add noexcept to the constructors and runtime_format generator functions. libstdc++-v3/ChangeLog: PR libstdc++/113320 * include/std/format (__format::_Runtime_format_string): Add constructor and disable copy operations. (basic_format_string(_Runtime_format_string)): Add noexcept and take parameter by value not rvalue reference. (runtime_format): Add noexcept. * testsuite/std/format/runtime_format.cc: Check noexcept. Check that construction is only possible from prvalues, not xvalues. Reviewed-by: Daniel Krügler <daniel.kruegler@gmail.com> |
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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.