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From: johnb@stl.sarov.ru To: gcc-gnats@gcc.gnu.org Subject: libstdc++/8780: std::vector iterators not recognized as pointers by templates in certain cases Date: Mon, 02 Dec 2002 01:06:00 -0000 [thread overview] Message-ID: <20021202090456.10057.qmail@sources.redhat.com> (raw) >Number: 8780 >Category: libstdc++ >Synopsis: std::vector iterators not recognized as pointers by templates in certain cases >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Mon Dec 02 01:06:00 PST 2002 >Closed-Date: >Last-Modified: >Originator: Eugeny Belov >Release: g++ (GCC) 3.2 20020903 (Red Hat Linux 8.0 3.2-7) >Organization: >Environment: Red Hat Linux 8.0. >Description: The attached testcase code uses STL to check whether the type given in the template specification of is_pointer_helper (in this case std::vector<int>::iterator) is a pointer type. (See also ISO\IEC 14882, 24.1.(1,2)) So, trying to compile this testcase by g++ I get the error messages: tr18877.cpp: In function `int main()': tr18877.cpp:37: `sizeof' applied to incomplete type ` STATIC_ASSERTION_FAILURE<false>' tr18877.cpp:37: declaration does not declare anything The first error occure due the vector<int> iterator isn`t a pointer type, the second warning is legitimate. >How-To-Repeat: Try to compile the testcase with g++. >Fix: >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: text/plain; name="veciter.cpp" Content-Disposition: inline; filename="veciter.cpp" #include <vector> //#include <list> template<int> struct static_assert_test{}; template <bool> struct STATIC_ASSERTION_FAILURE; template <> struct STATIC_ASSERTION_FAILURE<true>{}; #define BOOST_STATIC_ASSERT( B ) static_assert_test<sizeof(STATIC_ASSERTION_FAILURE< ( B ) >)> template <typename T> struct is_pointer_helper { static const bool value = false; }; template <typename T> struct is_pointer_helper<T*> { static const bool value = true; }; template <typename T> struct is_pointer_helper<T*const> { static const bool value = true; }; template <typename T> struct is_pointer_helper<T*volatile> { static const bool value = true; }; template <typename T> struct is_pointer_helper<T*const volatile> { static const bool value = true; }; int main(void) { BOOST_STATIC_ASSERT(is_pointer_helper<std::vector<int>::iterator>::value); return(0); }
next reply other threads:[~2002-12-02 9:06 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-12-02 1:06 johnb [this message] 2002-12-02 5:31 paolo 2002-12-04 10:24 paolo 2002-12-04 10:26 Joe Buck
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