[Bug c++/95454] type-level nodiscard not applied to constructors

[kyrylo.bohdanenko at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95454

Kyrylo Bohdanenko <kyrylo.bohdanenko at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |kyrylo.bohdanenko at gmail dot 
com

--- Comment #2 from Kyrylo Bohdanenko <kyrylo.bohdanenko at gmail dot com> ---
Still relevant as of the current trunk.

A workaround would be to declare the constructor(s) [[nodiscard]]:

struct Data {
    [[nodiscard]] Data() {}
};

int main() {
    Data{};
}

This actually issues a warning:

<source>: In function 'int main()':
<source>:6:11: warning: ignoring return value of 'Data::Data()', declared with
attribute 'nodiscard' [-Wunused-result]

Sandbox: https://godbolt.org/z/3Koj8rra7