https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70156
Bug ID: 70156
Summary: incorrect "incomplete type" error initializing a
static const data member
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The two definitions of the data members of class C in the program below are
rejected as a required. However, the text of only the second diagnostic is
correct. The text of the first diagnostic is not since the type A<0> is
complete at the point it's used.
$ cat v.c && /home/msebor/build/gcc-trunk-svn/gcc/xgcc
-B/home/msebor/build/gcc-trunk-svn/gcc -Wall -Wextra -Wpedantic -xc++ v.c
template <int> struct A { int i; };
struct B { int i; };
struct C {
static const A<0> a = { 0 };
static const B b = { 1 };
};
v.c:4:31: error: in-class initialization of static data member ‘const A<0>
C::a’ of incomplete type
static const A<0> a = { 0 };
^
v.c:5:28: error: ‘constexpr’ needed for in-class initialization of static data
member ‘const B C::b’ of non-integral type [-fpermissive]
static const B b = { 1 };
^
