[flang] Merge pull request flang-compiler/f18#822 from flang-compiler/pmk-nullptr
authorPeter Klausler <35819229+klausler@users.noreply.github.com>
Mon, 11 Nov 2019 22:41:22 +0000 (14:41 -0800)
committerGitHub <noreply@github.com>
Mon, 11 Nov 2019 22:41:22 +0000 (14:41 -0800)
commit3efb332af2a6b0ded9ff8c318cf9f845c5ffaefc
treec1f9b3e6fbce0da34ce29353960af7dba1d493ed
parent18f5ce59649a7715279b9cf4c4e076fa4b515866
[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@fdb351ca2afb0d71028785da4687113343e11f54
Reviewed-on: https://github.com/flang-compiler/f18/pull/822