[cfe-dev] [libc++] Unsupported Tests

Eric Fiselier via cfe-dev cfe-dev at lists.llvm.org
Sun Apr 15 15:04:23 PDT 2018

Yeah, that can be one reason why a test is marked unsupported. Although if
we expect the compiler to catch up, those tests are often marked as XFAIL
so they start "failing" when the compiler implements the feature.
The most common reason a test is unsupported is that it requires a certain
dialect (Ex. C++17), so the test is marked // UNSUPPORTED: c++98, c++03,
c++11, c++14


On Sat, Apr 14, 2018 at 4:18 AM, Christiano SA via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> Is a test classified as "unsupported" always when the library is ahead of
> the compiler? For example: the nodiscard attribute can be present in the
> library and at same time may not be implemented in the compiler.
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