[flang-commits] [PATCH] D96982: [flang] Extension: forward refs to dummy args under IMPLICIT NONE

[Peter Klausler via Phabricator via flang-commits]

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Most Fortran compilers accept the following benign extension,
and it appears in some applications:

  SUBROUTINE FOO(A,N)
    IMPLICIT NONE
    REAL A(N) ! N is used before being typed
    INTEGER N
  END

Allow it in f18 only for default integer scalar dummy arguments.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D96982

Files:
  flang/docs/Extensions.md
  flang/include/flang/Common/Fortran-features.h
  flang/lib/Semantics/resolve-names.cpp
  flang/test/Semantics/assign04.f90
  flang/test/Semantics/resolve103.f90

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