[Bug c++/65398] New: [C++11] GCC rejects constexpr variable definitions with valid initialization

[kariya_mitsuru at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65398

            Bug ID: 65398
           Summary: [C++11] GCC rejects constexpr variable definitions
                    with valid initialization
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kariya_mitsuru at hotmail dot com

Created attachment 35017
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35017&action=edit
g++ -v

The sample code below should be compiled successfully but gcc 5.0 rejects it.

================= sample code =================
constexpr char s[] = "abc";
constexpr char c = *(&s[0] + 1);

int main() {}
================= sample code =================

cf. http://melpon.org/wandbox/permlink/jRbgl6YCTXHSspI9


Note that gcc 4.9.2 accepts it.

cf. http://melpon.org/wandbox/permlink/bwuaSYUvgwAjRTfo


Note also that gcc 5.0 accepts if "&s[0]" is replaced with "s".

================= sample code =================
constexpr char s[] = "abc";
constexpr char c = *(s + 1);

int main() {}
================= sample code =================
cf. http://melpon.org/wandbox/permlink/sy0THyfnSq6XCT0L