uv_type: supress -Werror=unused compiler error

[aloisklink]

The uv_type() constructor does not use its token parameter, which causes a -Werror=unused compiler error on GCC (and probably on other compilers too).

Luckily, C++17 adds the [[maybe_unused]] attribute that all standards compliant compilers will support to hide unused errors. Removed, see #296 (comment).

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This fixes the error reported in #294 (comment), but I didn't want to add a Fixes: #294 into my commit or PR, since it seems like that issue is more about disabling all potential warnings using CMake, not just this single error.

[skypjack]

Oh, well, since the parameter name is the same of the type, I'd just drop the first one. As in:

explicit uv_type(loop::token, std::shared_ptr<loop> ref) noexcept

Rather than:

explicit uv_type([[maybe_unused]] loop::token token, std::shared_ptr<loop> ref) noexcept

[aloisklink]

Oh, well, since the parameter name is the same of the type, I'd just drop the first one.

That makes sense! You only really need [[maybe_unused]] if you need to give the parameter a name (e.g. for Doxygen). I've fixed this in 619bf5d, and I've updated the commit/PR description to remove any references to [[maybe_unused]].

[skypjack]

Thank you (and sorry for the late reply, I'm out of home).

[aloisklink]

Thank you (and sorry for the late reply, I'm out of home).

No worries! 2 days isn't really a late reply! I might take a while to reply too, since although we're generally allowed to submit patches to open-source, we're only allowed to do it in our personal time!