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* [Bug c++/50958] New: [C++0x] raw literal operator provides incorrect string for integer literal '0' @ 2011-11-02 9:16 daniel.kruegler at googlemail dot com 2011-11-02 14:00 ` [Bug c++/50958] " 3dw4rd at verizon dot net ` (4 more replies) 0 siblings, 5 replies; 6+ messages in thread From: daniel.kruegler at googlemail dot com @ 2011-11-02 9:16 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50958 Bug #: 50958 Summary: [C++0x] raw literal operator provides incorrect string for integer literal '0' Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: daniel.kruegler@googlemail.com CC: 3dw4rd@verizon.net gcc 4.7.0 20111029 (experimental) in C++0x mode rejects the following code: //--- typedef decltype(sizeof(0)) size_type; constexpr size_type cstrlen_impl(const char* s, size_type i) { return s[i] ? cstrlen_impl(s, i + 1) : i; } constexpr size_type cstrlen(const char* s) { return s ? cstrlen_impl(s, 0) : throw 0; } constexpr size_type operator "" _lenraw(const char* digits) { return cstrlen(digits); } static_assert(1_lenraw == 1, "Ouch"); // OK static_assert(0_lenraw == 1, "Ouch"); // Error //--- The error I'm getting is: main.cpp|19|error: non-constant condition for static assertion| main.cpp|19| in constexpr expansion of 'operator"" _lenraw(0u)'| main.cpp|15| in constexpr expansion of 'cstrlen(digits)'| main.cpp|10|error: expression '<throw-expression>' is not a constant-expression| This allows the conclusion, that the octal integer literal '0' is incorrectly handled, instead of the expected string length of 1 the raw literal operator gets a NULL string pointer. This seems to violate 2.14.8 p3 where 'n' would be equal to '0' which should lead to the effective string literal argument "0" in this case. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50958] [C++0x] raw literal operator provides incorrect string for integer literal '0' 2011-11-02 9:16 [Bug c++/50958] New: [C++0x] raw literal operator provides incorrect string for integer literal '0' daniel.kruegler at googlemail dot com @ 2011-11-02 14:00 ` 3dw4rd at verizon dot net 2011-11-09 10:50 ` daniel.kruegler at googlemail dot com ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: 3dw4rd at verizon dot net @ 2011-11-02 14:00 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50958 --- Comment #1 from Ed Smith-Rowland <3dw4rd at verizon dot net> 2011-11-02 14:00:11 UTC --- In http://gcc.gnu.org/ml/gcc-patches/2011-10/msg02804.html I have a patch to address a resolution issue. For some reason, this bug doesn't show up in that version. I'll try to understand this bug but ultimately (and soon) I'd like to put a version of that patch in and call it done. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50958] [C++0x] raw literal operator provides incorrect string for integer literal '0' 2011-11-02 9:16 [Bug c++/50958] New: [C++0x] raw literal operator provides incorrect string for integer literal '0' daniel.kruegler at googlemail dot com 2011-11-02 14:00 ` [Bug c++/50958] " 3dw4rd at verizon dot net @ 2011-11-09 10:50 ` daniel.kruegler at googlemail dot com 2011-11-16 16:07 ` 3dw4rd at verizon dot net ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: daniel.kruegler at googlemail dot com @ 2011-11-09 10:50 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50958 --- Comment #2 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2011-11-09 10:42:18 UTC --- (In reply to comment #1) I have now tested gcc 4.7.0 20111105, but the problem still seems to exist. I can reproduce it on Windows XP 32 bit and Windows 7 64 bit. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50958] [C++0x] raw literal operator provides incorrect string for integer literal '0' 2011-11-02 9:16 [Bug c++/50958] New: [C++0x] raw literal operator provides incorrect string for integer literal '0' daniel.kruegler at googlemail dot com 2011-11-02 14:00 ` [Bug c++/50958] " 3dw4rd at verizon dot net 2011-11-09 10:50 ` daniel.kruegler at googlemail dot com @ 2011-11-16 16:07 ` 3dw4rd at verizon dot net 2011-11-21 19:44 ` jason at gcc dot gnu.org 2011-11-21 20:23 ` jason at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: 3dw4rd at verizon dot net @ 2011-11-16 16:07 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50958 --- Comment #3 from Ed Smith-Rowland <3dw4rd at verizon dot net> 2011-11-16 16:03:26 UTC --- Created attachment 25839 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25839 Patch to correctly resolve literal operators. Literal operators were not properly resolved according to . This means that there could be mismatches between the literal and the literal operator that is used to resolve it. This patch also fixes this bug. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50958] [C++0x] raw literal operator provides incorrect string for integer literal '0' 2011-11-02 9:16 [Bug c++/50958] New: [C++0x] raw literal operator provides incorrect string for integer literal '0' daniel.kruegler at googlemail dot com ` (2 preceding siblings ...) 2011-11-16 16:07 ` 3dw4rd at verizon dot net @ 2011-11-21 19:44 ` jason at gcc dot gnu.org 2011-11-21 20:23 ` jason at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jason at gcc dot gnu.org @ 2011-11-21 19:44 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50958 --- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> 2011-11-21 19:27:35 UTC --- Author: jason Date: Mon Nov 21 19:27:30 2011 New Revision: 181595 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=181595 Log: PR c++/50958 gcc/cp/ * parser.c (lookup_literal_operator): New. (cp_parser_userdef_char_literal): Use it. (cp_parser_userdef_numeric_literal): Use it. (cp_parser_userdef_string_literal): Use lookup_name. libcpp/ * expr.c (cpp_userdef_char_remove_type): Fix typo. Added: trunk/gcc/testsuite/g++.dg/cpp0x/udlit-implicit-conv-neg.C trunk/gcc/testsuite/g++.dg/cpp0x/udlit-raw-length.C trunk/gcc/testsuite/g++.dg/cpp0x/udlit-resolve.C Modified: trunk/gcc/cp/ChangeLog trunk/gcc/cp/parser.c trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/c-c++-common/dfp/pr33466.c trunk/gcc/testsuite/g++.dg/cpp0x/udlit-declare-neg.C trunk/gcc/testsuite/g++.dg/cpp0x/udlit-member-neg.C trunk/gcc/testsuite/g++.dg/cpp0x/udlit-raw-op-string-neg.C trunk/libcpp/ChangeLog trunk/libcpp/expr.c ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug c++/50958] [C++0x] raw literal operator provides incorrect string for integer literal '0' 2011-11-02 9:16 [Bug c++/50958] New: [C++0x] raw literal operator provides incorrect string for integer literal '0' daniel.kruegler at googlemail dot com ` (3 preceding siblings ...) 2011-11-21 19:44 ` jason at gcc dot gnu.org @ 2011-11-21 20:23 ` jason at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jason at gcc dot gnu.org @ 2011-11-21 20:23 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50958 Jason Merrill <jason at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |jason at gcc dot gnu.org Resolution| |FIXED Target Milestone|--- |4.7.0 --- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> 2011-11-21 19:48:07 UTC --- Fixed. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-11-21 19:48 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-11-02 9:16 [Bug c++/50958] New: [C++0x] raw literal operator provides incorrect string for integer literal '0' daniel.kruegler at googlemail dot com 2011-11-02 14:00 ` [Bug c++/50958] " 3dw4rd at verizon dot net 2011-11-09 10:50 ` daniel.kruegler at googlemail dot com 2011-11-16 16:07 ` 3dw4rd at verizon dot net 2011-11-21 19:44 ` jason at gcc dot gnu.org 2011-11-21 20:23 ` jason at gcc dot gnu.org
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