cppcoreguidelines-avoid-non-const-global-variables¶
Finds non-const global variables as described in I.2 of C++ Core Guidelines. As R.6 of C++ Core Guidelines is a duplicate of rule I.2 it also covers that rule.
char a; // Warns!
const char b = 0;
namespace some_namespace
{
char c; // Warns!
const char d = 0;
}
char * c_ptr1 = &some_namespace::c; // Warns!
char *const c_const_ptr = &some_namespace::c; // Warns!
char & c_reference = some_namespace::c; // Warns!
class Foo // No Warnings inside Foo, only namespace scope is covered
{
public:
char e = 0;
const char f = 0;
protected:
char g = 0;
private:
char h = 0;
};
The variables a
, c
, c_ptr1
, c_const_ptr
and c_reference
will all generate warnings since they are either a non-const globally accessible
variable, a pointer or a reference providing global access to non-const data
or both.