forked from OSchip/llvm-project
40 lines
1.2 KiB
ReStructuredText
40 lines
1.2 KiB
ReStructuredText
.. title:: clang-tidy - modernize-use-transparent-functors
|
|
|
|
modernize-use-transparent-functors
|
|
==================================
|
|
|
|
Prefer transparent functors to non-transparent ones. When using transparent
|
|
functors, the type does not need to be repeated. The code is easier to read,
|
|
maintain and less prone to errors. It is not possible to introduce unwanted
|
|
conversions.
|
|
|
|
.. code-block:: c++
|
|
|
|
// Non-transparent functor
|
|
std::map<int, std::string, std::greater<int>> s;
|
|
|
|
// Transparent functor.
|
|
std::map<int, std::string, std::greater<>> s;
|
|
|
|
// Non-transparent functor
|
|
using MyFunctor = std::less<MyType>;
|
|
|
|
It is not always a safe transformation though. The following case will be
|
|
untouched to preserve the semantics.
|
|
|
|
.. code-block:: c++
|
|
|
|
// Non-transparent functor
|
|
std::map<const char *, std::string, std::greater<std::string>> s;
|
|
|
|
Options
|
|
-------
|
|
|
|
.. option:: SafeMode
|
|
|
|
If the option is set to non-zero, the check will not diagnose cases where
|
|
using a transparent functor cannot be guaranteed to produce identical results
|
|
as the original code. The default value for this option is `0`.
|
|
|
|
This check requires using C++14 or higher to run.
|