[all-commits] [llvm/llvm-project] be6bc6: [flang] Better recovery from errors in a loop cont...

[Peter Klausler via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: be6bc6a1e5beb84984b8e1419393c80a3fe2d3d8
      https://github.com/llvm/llvm-project/commit/be6bc6a1e5beb84984b8e1419393c80a3fe2d3d8
  Author: Peter Klausler <pklausler at nvidia.com>
  Date:   2024-11-21 (Thu, 21 Nov 2024)

  Changed paths:
    M flang/docs/ParserCombinators.md
    M flang/lib/Parser/executable-parsers.cpp
    M flang/lib/Parser/type-parsers.h
    A flang/test/Parser/recovery07.f90

  Log Message:
  -----------
  [flang] Better recovery from errors in a loop control (#117025)

When there's an error in a DO statement loop control, error recovery
isn't great. A bare "DO" is a valid statement, so a failure to parse its
loop control doesn't fail on the whole statement. Its partial parse ends
after the keyword, and as some other statement parsers can get further
into the input before failing, errors in the loop control can lead to
confusing error messages about bad pointer assignment statements and
others. So just check that a bare "DO" is followed by the end of the
statement.



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