.. title:: clang-tidy - modernize-avoid-c-style-cast

modernize-avoid-c-style-cast
============================

Finds usages of C-style casts.

C-style casts can perform a variety of different conversions (``const_cast``,
``static_cast``, ``reinterpret_cast``, or a combination). This makes them
dangerous as the intent is not clear, and they can silently perform unsafe
conversions between incompatible types.

This check is similar to `-Wold-style-cast`, but it suggests automated fixes
in some cases. The reported locations should not be different from the ones
generated by `-Wold-style-cast`.

Examples
--------

.. code-block:: c++

  class A {
    public:
    std::string v;
  };

  A a;
  double *num = (double*)(&a);           // Compiles! Hides danger
  // num = static_cast<double*>(&a);     // Won't compile (good!)
  num = reinterpret_cast<double*>(&a);   // Compiles, danger is explicit


References
----------

Corresponding cpplint.py check name: `readability/casting`.