When localization is disabled, we used to skip testing a lot of headers.
However, these headers are now "no-ops" when localization is disabled,
so they can actually be included. As such, we should test their
inclusion in our usual header inclusion tests.
Around half of the tests are based on the tests Arthur O'Dwyer's
original implementation of std::flat_map, with modifications and
removals.
partially implement #105190
On Windows the libc++ test suite sees the MSVC STL headers and may
conclude these are libc++ headers when inspecting the name. Modules
guard against forgetting to export new headers. Finding MSVC STL's
headers gives false positives. Since the CI tests non-Windows platforms
too, the validation will be disabled on Windows.
Fixes: https://github.com/llvm/llvm-project/issues/79010
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Co-authored-by: Louis Dionne <ldionne.2@gmail.com>
This adds the std.compat module. The patch contains a bit of refactoring
to avoid code duplication between the std and std.compat module.
Implements parts of
- P2465R3 Standard Library Modules std and std.compat
