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Everywhere: Switch from (void) to [[maybe_unused]] (#4473)

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Problem:
- `(void)` simply casts the expression to void. This is understood to
  indicate that it is ignored, but this is really a compiler trick to
  get the compiler to not generate a warning.

Solution:
- Use the `[[maybe_unused]]` attribute to indicate the value is unused.

Note:
- Functions taking a `(void)` argument list have also been changed to
  `()` because this is not needed and shows up in the same grep
  command.
This commit is contained in:
Lenny Maiorani 2020-12-20 16:09:48 -07:00 • committed by GitHub
parent 4421d98e30
commit 765936ebae
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GPG key ID: 4AEE18F83AFDEB23
103 changed files with 219 additions and 362 deletions
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4
Libraries/LibWeb/DOM/Window.cpp
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@ -98,7 +98,7 @@ void Window::timer_did_fire(Badge<Timer>, Timer& timer)
m_timers.remove(timer.id());
}
(void)vm.call(timer.callback(), wrapper());
[[maybe_unused]] auto rc = vm.call(timer.callback(), wrapper());
if (vm.exception())
vm.clear_exception();
}
@ -132,7 +132,7 @@ i32 Window::request_animation_frame(JS::Function& callback)
auto& function = const_cast<JS::Function&>(static_cast<const JS::Function&>(*handle.cell()));
auto& vm = function.vm();
fake_timestamp += 10;
(void)vm.call(function, {}, JS::Value(fake_timestamp));
[[maybe_unused]] auto rc = vm.call(function, {}, JS::Value(fake_timestamp));
if (vm.exception())
vm.clear_exception();
GUI::DisplayLink::unregister_callback(link_id);