[flang-commits] [PATCH] D111254: [flang] Catch mismatched parentheses in prescanner

[Peter Klausler via Phabricator via flang-commits]

klausler created this revision.
klausler added a reviewer: PeteSteinfeld.
klausler added a project: Flang.
Herald added a subscriber: jdoerfert.
Herald added a reviewer: sscalpone.
klausler requested review of this revision.

Source lines with mismatched parentheses are hard cases for error
recovery in parsing, and the best error message (viz.,
"here's an unmatched parenthesis") can be emitted from the
prescanner.


https://reviews.llvm.org/D111254

Files:
  flang/lib/Parser/prescan.cpp
  flang/lib/Parser/token-sequence.cpp
  flang/lib/Parser/token-sequence.h
  flang/test/Parser/unmatched-parens.f90

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