Stephan T. Lavavej 346a29908e

[libc++][test] Fix unused and nodiscard warnings (#73437) ...

Found while running libc++'s test suite with MSVC's STL.

This is structured into a series of commits for easier reviewing; I
could also split this into smaller PRs if desired.

* Add void-casts for `invoke_r` calls to fix MSVC STL `[[nodiscard]]`
warnings.
+ Our rationale is that if someone is calling `invoke_r<NonVoidType>`,
it sure looks like they care about the return value.
* Add `[[maybe_unused]]` to silence `-Wunused-parameter` warnings.
+ This happens because the parameters are used within `LIBCPP_ASSERT`,
which vanishes for MSVC's STL. This also motivates the following
changes.
* Add `[[maybe_unused]]` to fix `-Wunused-variable` warnings.
* Always void-cast `debug_comparisons` to fix `-Wunused-variable`
warnings.
+ As this was already unused with a void-cast in one
`_LIBCPP_HARDENING_MODE` branch, I'm simply lifting it next to the
variable definition.
* Add `[[maybe_unused]]` to fix `-Wunused-local-typedef` warnings.

2023-11-26 18:00:18 +01:00

..

invoke_constexpr.pass.cpp

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invoke_r.pass.cpp

[libc++][test] Fix unused and nodiscard warnings (#73437)

2023-11-26 18:00:18 +01:00

invoke_r.temporary.verify.cpp

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invoke.pass.cpp

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