From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 11495 invoked by alias); 16 Sep 2011 13:48:47 -0000 Received: (qmail 11485 invoked by uid 22791); 16 Sep 2011 13:48:46 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 16 Sep 2011 13:48:29 +0000 From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/50431] [C++0x] bug in def array size with a lambda Date: Fri, 16 Sep 2011 14:01:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Keywords: error-recovery, ice-on-invalid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: redi at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-09/txt/msg01175.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50431 --- Comment #4 from Jonathan Wakely 2011-09-16 13:47:49 UTC --- (In reply to comment #2) > BUG1: > auto sz = []()->constexpr long { return 100L; }; > int arr[sz()]; > > Why constexpr for lambda won't be compiled? Can i not use auto type for a > lambda variant? The closure type's function call operator can be const but not constexpr. You can use auto for a lambda, you just can't have a constexpr lambda. Why do you want it to work? What advantage is there to using a lambda instead of named function? e.g. constexpr long sz() { return 100L; }; int arr[sz()];