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From: "roi.jacobson1 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/109941] [feat req] Add an option to mark STL types as nodiscard
Date: Tue, 23 May 2023 13:31:45 +0000	[thread overview]
Message-ID: <bug-109941-4-Iy90vMFpUM@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-109941-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109941

--- Comment #4 from Roy Jacobson <roi.jacobson1 at gmail dot com> ---
The linked bug is about nodiscard applied to the class together with ignoring
temporary objects. But GCC will when the type is the return value or when the
nodiscard is applied to the constructor:

class [[nodiscard]] err {};
err f();

void g() {
    f(); // Warning emitted
}

struct RAII {
    [[nodiscard]] RAII(int x);
};

void h() {
    RAII(0); // Warning emitted
}

      parent reply	other threads:[~2023-05-23 13:31 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-23 12:15 [Bug libstdc++/109941] New: " roi.jacobson1 at gmail dot com
2023-05-23 12:36 ` [Bug libstdc++/109941] " de34 at live dot cn
2023-05-23 12:39 ` roi.jacobson1 at gmail dot com
2023-05-23 13:24 ` redi at gcc dot gnu.org
2023-05-23 13:24 ` redi at gcc dot gnu.org
2023-05-23 13:31 ` roi.jacobson1 at gmail dot com [this message]

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