[flang] Merge pull request flang-compiler/f18#822 from flang-compiler/pmk-nullptr

Remove explicit comparisons to `nullptr` and most usage of `has_value()`

Original-commit: flang-compiler/f18@fdb351ca2a
Reviewed-on: https://github.com/flang-compiler/f18/pull/822
This commit is contained in:
Peter Klausler 2019-11-11 14:41:22 -08:00 committed by GitHub
parent 18f5ce5964
commit 3efb332af2

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