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system: `is_directory` #946

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perazz wants to merge 5 commits into fortran-lang:master from perazz:system_is_dir

+209 −2

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perazz commented Mar 7, 2025

This PR is spun off #904 for clarity.

It provides a logical function to evaluate whether a given path is a directory.
On Windows, it natively works both with / and \ separators.
Relies on C functions, to avoid Fortran pre-processor macros and path swapping, that would be slow.

Some questions to discuss that come to my mind:

Should this be part of stdlib_system, stdlib_io, or maybe a submodule(stdlib_system) stdlib_system_filesystem? or else?
Should we begin standardizing the C-side names somehow? They use the same global namespace, so we should start being careful imho.

cc: @jvdp1 @jalvesz

perazz added 5 commits

March 7, 2025 12:34


          implement is_directory

38e2337


          add tests

ff42248


          add specs

f33e46a


          add example

3debb1f


          ensure trimmed path

8dfaac7

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