File: modernize-use-using.rst

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.. title:: clang-tidy - modernize-use-using

modernize-use-using
===================

The check converts the usage of ``typedef`` with ``using`` keyword.

Before:

.. code-block:: c++

  typedef int variable;

  class Class{};
  typedef void (Class::* MyPtrType)() const;

  typedef struct { int a; } R_t, *R_p;

After:

.. code-block:: c++

  using variable = int;

  class Class{};
  using MyPtrType = void (Class::*)() const;

  using R_t = struct { int a; };
  using R_p = R_t*;

This check requires using C++11 or higher to run.

Options
-------

.. option:: IgnoreMacros

   If set to non-zero, the check will not give warnings inside macros. Default
   is `1`.