[PATCH] D86557: [flang] Check that various variables referenced in I/O statements may be defined

[Peter Klausler via Phabricator via llvm-commits]

klausler created this revision.
klausler added reviewers: sscalpone, PeteSteinfeld.
klausler added a project: Flang.
Herald added a reviewer: jdoerfert.
Herald added a reviewer: DavidTruby.
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.
klausler requested review of this revision.

A number of I/O syntax rules involve variables that will be written to,
and must therefore be definable.  This includes internal file variables,
IOSTAT= and IOMSG= specifiers, most INQUIRE statement specifiers, a few
other specifiers, and input variables.  This patch checks for
these violations, and implements several additional I/O TODO constraint
checks.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D86557

Files:
  flang/lib/Semantics/check-io.cpp
  flang/lib/Semantics/check-io.h
  flang/test/Semantics/deallocate05.f90
  flang/test/Semantics/io01.f90
  flang/test/Semantics/io02.f90
  flang/test/Semantics/io03.f90
  flang/test/Semantics/io04.f90
  flang/test/Semantics/io05.f90
  flang/test/Semantics/io06.f90

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