1.. title:: clang-tidy - misc-misplaced-const
2
3misc-misplaced-const
4====================
5
6This check diagnoses when a ``const`` qualifier is applied to a ``typedef``/
7``using`` to a pointer type rather than to the pointee, because such constructs
8are often misleading to developers because the ``const`` applies to the pointer
9rather than the pointee.
10
11For instance, in the following code, the resulting type is ``int * const``
12rather than ``const int *``:
13
14.. code-block:: c++
15
16  typedef int *int_ptr;
17  void f(const int_ptr ptr) {
18    *ptr = 0; // potentially quite unexpectedly the int can be modified here
19    ptr = 0; // does not compile
20  }
21
22The check does not diagnose when the underlying ``typedef``/``using`` type is a
23pointer to a ``const`` type or a function pointer type. This is because the
24``const`` qualifier is less likely to be mistaken because it would be redundant
25(or disallowed) on the underlying pointee type.
26