public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/52321] poor diagnostic of invalid cast Date: Tue, 21 Feb 2012 15:59:00 -0000 [thread overview] Message-ID: <bug-52321-4-3w7qiDrv3B@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-52321-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52321 --- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-02-21 15:53:10 UTC --- Yep, it's build_static_cast_1 in typeck.c But currently that has no way to store or pass back a message (just a boolean indicating success or failure and the result of the cast) and would need a lot of restructuring. if (target is pointer or reference && source is class type && target is class type && (target is rvalue || source is lvalue) && target is derived from source && can convert && at least as qualified) Your example fails the "target is derived from source" test, but that test doesn't say it failed because the type is incomplete, it just returns false. And the "can convert" step might fail for a number of reasons, but again it just returns a boolean. Modifying that to report different reasons (rather than just evaluating to 'false') is not simple.
next prev parent reply other threads:[~2012-02-21 15:53 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-02-21 1:36 [Bug c++/52321] New: " igodard at pacbell dot net 2012-02-21 11:18 ` [Bug c++/52321] " redi at gcc dot gnu.org 2012-02-21 15:38 ` igodard at pacbell dot net 2012-02-21 15:59 ` redi at gcc dot gnu.org [this message] 2012-02-21 17:41 ` igodard at pacbell dot net 2012-02-22 16:15 ` manu at gcc dot gnu.org 2015-03-03 10:19 ` redi at gcc dot gnu.org
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-52321-4-3w7qiDrv3B@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).