.. title:: clang-tidy - cppcoreguidelines-no-malloc

cppcoreguidelines-no-malloc
===========================

This check handles C-Style memory management using ``malloc()``, ``realloc()``,
``calloc()`` and ``free()``. It warns about its use and tries to suggest the use
of an appropriate RAII object.
See `C++ Core Guidelines
<https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Rr-mallocfree>`.

There is no attempt made to provide fixit hints, since manual resource management isn't
easily transformed automatically into RAII.

.. code-block:: c++

  // Warns each of the following lines.
  // Containers like std::vector or std::string should be used.
  char* some_string = (char*) malloc(sizeof(char) * 20);
  char* some_string = (char*) realloc(sizeof(char) * 30);
  free(some_string);

  int* int_array = (int*) calloc(30, sizeof(int));

  // Rather use a smartpointer or stack variable.
  struct some_struct* s = (struct some_struct*) malloc(sizeof(struct some_struct));

