clang-tools-extra/docs/clang-tidy/checks/mpi-type-mismatch.rst

.. title:: clang-tidy - mpi-type-mismatch

mpi-type-mismatch
=================

This check verifies if buffer type and MPI (Message Passing Interface) datatype
pairs match for used MPI functions. All MPI datatypes defined by the MPI
standard (3.1) are verified by this check. User defined typedefs, custom MPI
datatypes and null pointer constants are skipped, in the course of verification.

Example:

.. code-block:: c++

  // In this case, the buffer type matches MPI datatype.
  char buf;
  MPI_Send(&buf, 1, MPI_CHAR, 0, 0, MPI_COMM_WORLD);

  // In the following case, the buffer type does not match MPI datatype.
  int buf;
  MPI_Send(&buf, 1, MPI_CHAR, 0, 0, MPI_COMM_WORLD);