c++ - Why does MPI_Send accept void * source? -

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i wondering why signature of mpi_send below:

int mpi_send(void *buf, int count, mpi_datatype datatype, int dest, int tag,   mpi_comm comm)

the first parameter of type void *. why first parameter of type void * rather const void *. mpi_send modify source?

i ask such kind of question because use mpi c++ , pass message.c_str() mpi_send function message of type std::string. in way, compiler complains.

will mpi_send modify source?

no, won't.

my question why first parameter of type void * rather const void *.

bad design.

the first versions of mpi released after c has been standardized in 1989 , const available standard.

a proposal add missing const mpi_send , other mpi functions submitted , accepted future mpi-3.

https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/140


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