d179176f3e
This uses the macro on record types and inline constexpr variables. The tagged declarations are very likely to change in future versions of libc++: - __fields are internal types used to control the formatter's parse functions which fields to expect. Newer formatters may add new fields. For example the filesystem::path formatter accepted in the recent Tokyo meeting added a new 'g' flag, which differs from the 'g' type. - The Unicode tables. The number of entries in these table likely differ between Unicode versions. The tables contain only a part of all Unicode properties. Typically they are stored in a 32-bit entry where some bits contain the properties and other bits the size of the range. Changes in the Unicode or C++ algorithms may require more properties to be available in C++. This may affect the number of bits available in the range. If needed, other declarations get the macro. This is mainly a first time to review this approach. This was originally https://reviews.llvm.org/D143494 where a new macro _LIBCPP_HIDE_FROM_ABI_TYPE was defined. Testing revealed the existing macro _LIBCPP_HIDE_FROM_ABI could be used. The "parts" of the macro that do not affect records are not harmful. Based on this information the existing macro was used and additional documentation was written.
The LLVM Compiler Infrastructure
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This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
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