https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66297
Bug ID: 66297
Summary: constexpr non-static member functions of non-literal
types
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: lloda at bluewin dot ch
Target Milestone: ---
See
https://groups.google.com/a/isocpp.org/forum/#!topic/std-discussion/6jM8M8FUs30
and referenced there
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1684.
The example given in the first link
#include <string>
struct X {
std::string s;
constexpr int foo() { return 42; }
};
int main() {}
clang 3.6 accepts the code. GCC 5.1.0 produces this error:
> $CXX -std=c++14 constexpr-nonliteral.C
constexpr-nonliteral.C:7:19: error: enclosing class of constexpr non-static
member function 'int X::foo()' is not a literal type
constexpr int foo() { return 42; }
^
constexpr-nonliteral.C:5:8: note: 'X' is not literal because:
struct X {
^
constexpr-nonliteral.C:5:8: note: 'X' has a non-trivial destructor
