1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
.. title:: clang-tidy - cppcoreguidelines-avoid-non-const-global-variables
cppcoreguidelines-avoid-non-const-global-variables
==================================================
Finds non-const global variables as described in `I.2
<https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#i2-avoid-non-const-global-variables>`_
of C++ Core Guidelines.
As `R.6 <https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Rr-global>`_
of C++ Core Guidelines is a duplicate of rule `I.2
<https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#i2-avoid-non-const-global-variables>`_
it also covers that rule.
.. code-block:: c++
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.
Options
-------
.. option:: AllowInternalLinkage
When set to `true`, static non-const variables and variables in anonymous
namespaces will not generate a warning. The default value is `false`.
|
