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From: bangerth@dealii.org To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, kilpatds@oppositelock.org, nobody@gcc.gnu.org Subject: Re: c++/10307: constructor for static object of template omitted Date: Thu, 03 Apr 2003 22:23:00 -0000 [thread overview] Message-ID: <20030403222355.15101.qmail@sources.redhat.com> (raw) Synopsis: constructor for static object of template omitted State-Changed-From-To: open->analyzed State-Changed-By: bangerth State-Changed-When: Thu Apr 3 22:23:54 2003 State-Changed-Why: Behavior confirmed with all versions of gcc (2.95 .. 3.4). Another testcase is this: ---------------------- #include <iostream> // ------------- template int template_counter = 0; struct TemplateStatic { TemplateStatic () { ++template_counter; } }; template <typename T> struct Template { static TemplateStatic s; }; template <typename T> TemplateStatic Template<T>::s; // ------------ non-template int non_template_counter = 0; struct NonTemplateStatic { NonTemplateStatic () { ++non_template_counter; } }; struct NonTemplate { static NonTemplateStatic s; }; NonTemplateStatic NonTemplate::s; // ------------- use both int main() { Template<int> t; NonTemplate nt; std::cout << template_counter << " " << non_template_counter << std::endl; } --------------------------- Both Template and NonTemplate have a static variable, but the constructor of them is only run for the non-template. I think this is actually what the standard prescribes, since static variables are only instantiated by use or by explicit instantiation, not by instantiation of the class they belong to. In fact, you can make the above code work as you expect it by adding this line: template TemplateStatic Template<int>::s; Maybe someone of those with more knowledge of these matters can confirm my interpretation? Regards Wolfgang PS: icc7 agrees with gcc in all this, so I'd say it's not a bug. http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10307
next reply other threads:[~2003-04-03 22:23 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-04-03 22:23 bangerth [this message] -- strict thread matches above, loose matches on Subject: below -- 2003-04-07 14:20 bangerth 2003-04-04 20:26 Wolfgang Bangerth 2003-04-04 20:16 Wolfgang Bangerth 2003-04-03 21:46 kilpatds
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