[flang-commits] [PATCH] D143821: [flang] Conform with standard (mostly) for character length mismatches on arguments

[Peter Klausler via Phabricator via flang-commits]

klausler created this revision.
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Fortran 2018 defines some flavors of dummy arguments to require exact
matching of character lengths between dummy and actual arguments;
these situations tend to be those in which the interface must be   
explicit and a descriptor is involved: assumed shape, assumed rank,
allocatable, and pointer.

Fortran allows an actual argument in other cases to have a longer  
length than the dummy argument; as a common extension, we support a  
shorter actual argument as well by means of blank padding, but should
emit a warning.


https://reviews.llvm.org/D143821

Files:
  flang/lib/Evaluate/characteristics.cpp
  flang/lib/Semantics/check-call.cpp
  flang/test/Lower/character-substrings.f90
  flang/test/Semantics/call03.f90
  flang/test/Semantics/call33.f90

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