[Bug c++/69772] New: enum class bool comparison error

[claytrychta at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69772

            Bug ID: 69772
           Summary: enum class bool comparison error
           Product: gcc
           Version: 5.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: claytrychta at gmail dot com
  Target Milestone: ---

The below code comparing a type of enum class bool fails to compile with this
error:

main.cpp: In function 'int main()':
main.cpp:10:47: error: could not convert 'test' from 'Test' to 'bool'
     const char *p = Test::Foo == test ? "a" : "b";

enum class Test : bool
{
    Foo,
    Bar
};

int main()
{
    Test test = Test::Foo;
    const char *p = Test::Foo == test ? "a" : "b";
    (void)p;
}

Changing the underlying type of the enum to other types (short, int, or long)
works.  Also, returning other types in the ternary (such as int) works.