In fairness, unsafe conversions are a feature of the C language, I assume since very early on. Assignment gets a pass to do horribly unsafe conversions. Unfortunately, when calling a function (with a prototype), the argument expressions are converted as if by assignment, which is the underlying cause for the truncation sadness.
~Jim. On Thu, Aug 8, 2019 at 9:45 AM Jeff Hammond via mpi-forum < mpi-forum@lists.mpi-forum.org> wrote: > That you use code that does unsafe conversions really has nothing to do > with the business of the MPI Forum. > > Again, if you think C89 is the best C, then use and teach that. No one > here is trying to make you use C11. > > Jeff > > > On Aug 8, 2019, at 5:56 AM, N.M. Maclaren via mpi-forum < > mpi-forum@lists.mpi-forum.org> wrote: > > > >> On Aug 7 2019, Jeff Hammond via mpi-forum wrote: > >> > >> "silently truncated at run time" is trivially addressed with > -Wconversion > >> or -Wshorten-64-to-32. The example program below is addressed by this. > > > > Unfortunately, no. While I have no trouble using such options on MY > > code, I have frequently found them unusable on imported packages, because > > of the flood of non-errors they generate. For example, the following > > code is both common and reasonable, and includes narrowing conversions: > > > > int i; > > i = sizeof(double); > > float x; > > x = 1.0; > _______________________________________________ > mpi-forum mailing list > mpi-forum@lists.mpi-forum.org > https://lists.mpi-forum.org/mailman/listinfo/mpi-forum >
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