[flang] Merge pull request flang-compiler/f18#61 from ThePortlandGroup/pmk-cset
authorPeter Klausler <35819229+klausler@users.noreply.github.com>
Thu, 19 Apr 2018 20:51:46 +0000 (13:51 -0700)
committerGitHub <noreply@github.com>
Thu, 19 Apr 2018 20:51:46 +0000 (13:51 -0700)
Define SetOfChars type, use it

Original-commit: flang-compiler/f18@1d563ba59fa5d3eff4bc5b4796ca7e8525f064fb
Reviewed-on: https://github.com/flang-compiler/f18/pull/61


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