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From: "Ko dot vanderSloot at uvt dot nl" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/31401] New: string find behaves strange when searching from npos Date: Fri, 30 Mar 2007 14:53:00 -0000 [thread overview] Message-ID: <bug-31401-14338@http.gcc.gnu.org/bugzilla/> (raw) the following program demonstrates, what I think, a flaw in std::string find. According to me and (see comp.lang.c++ and c.l.c++.moderated) many others, find( "astring", string::npos ) should always return string::npos. But G++ seems to wrap around an start searching at the begin of the string. sample program: #include <iostream> #include <string> using namespace std; int main(){ string use = "anu"; string::size_type pos1 = use.find_first_not_of( "an" ); cerr << "pos1=" << pos1 << endl; pos1 = use.find( "a", string::npos ); if ( pos1 == string::npos ) cerr << "I expected this" << endl; else cerr << "problem because pos1=" << pos1 << endl; pos1 = use.find( "q", string::npos ); if ( pos1 == string::npos ) cerr << "I expected this" << endl; else cerr << "problem because pos1=" << pos1 << endl; } -- Summary: string find behaves strange when searching from npos Product: gcc Version: 4.1.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: Ko dot vanderSloot at uvt dot nl http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31401
next reply other threads:[~2007-03-30 14:53 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-03-30 14:53 Ko dot vanderSloot at uvt dot nl [this message] 2007-03-30 16:26 ` [Bug libstdc++/31401] " pcarlini at suse dot de 2007-03-30 16:52 ` pcarlini at suse dot de 2007-03-30 17:11 ` paolo at gcc dot gnu dot org 2007-03-30 17:12 ` paolo at gcc dot gnu dot org 2007-03-30 17:13 ` pcarlini at suse dot de 2007-04-02 10:09 ` paolo at gcc dot gnu dot org 2007-04-02 10:09 ` paolo at gcc dot gnu dot org 2007-07-11 18:20 ` pcarlini at suse dot de
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