[Bug c++/98019] Concepts: compound requirement expression from 'requires' expression is considered discarded-value expression for [[nodiscard]], false positive warning emitted

[egor_suvorov at mail dot ru via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98019

--- Comment #1 from Egor Suvorov <egor_suvorov at mail dot ru> ---
Also, I would expect a warning in this case:

requires {
    foo();  // Looks like a statement.
};

but not this:

requires {
    static_cast<void>(foo());
};

or this:

requires {
    { foo() };  // expression check without return type requirements
};