tree 57c292a9bb2c210dd48b9c250a1c8b4456861f65
parent ce394330c437f3921f611f33b9f2c35e4caced3f
author peter klausler <pklausler@nvidia.com> 1633041199 -0700
committer Copybara-Service <copybara-worker@google.com> 1633554285 -0700

[flang] Catch mismatched parentheses in prescanner

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.

Differential Revision: https://reviews.llvm.org/D111254#3046173

GitOrigin-RevId: 094b380c210ac508a1ad5a7c47a760773b0cc6ea