llvm-project/clang-tools-extra/docs/clang-tidy/checks/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`.