[flang] Implement first(...) as attempt at a faster set of alternatives.
authorpeter klausler <pklausler@nvidia.com>
Wed, 25 Apr 2018 20:34:40 +0000 (13:34 -0700)
committerpeter klausler <pklausler@nvidia.com>
Wed, 25 Apr 2018 21:16:15 +0000 (14:16 -0700)
commit6a0acd8505f8aba1c5bea2c1dc8e0123c51655d9
treed15ddf6eadb9dc149690b5a5c57c42ba373a2e11
parent9e94216abe7774b2816beec55a067d0cdd8f8cc3
[flang] Implement first(...) as attempt at a faster set of alternatives.

Original-commit: flang-compiler/f18@9f6a26cee636c3cc91d91583fd2b785f26a618c2
Reviewed-on: https://github.com/flang-compiler/f18/pull/73
Tree-same-pre-rewrite: false
flang/documentation/ParserCombinators.md
flang/lib/parser/basic-parsers.h
flang/lib/parser/grammar.h