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[flang] Remove some needless checks for mandatory spaces before keywords and names that could not be present anyway, they were slowing things down.

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Original-commit: flang-compiler/f18@a07b78d2d7
Reviewed-on: https://github.com/flang-compiler/f18/pull/35
This commit is contained in:
peter klausler 2018-03-30 11:32:37 -07:00
parent 59e3955ea9
commit fdae1bfc4a
1 changed files with 4 additions and 7 deletions
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11
flang/lib/parser/grammar.h
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@ -714,16 +714,14 @@ constexpr auto signedDigitString = "-"_ch >>
// R707 signed-int-literal-constant -> [sign] int-literal-constant
TYPE_PARSER(space >> sourced(construct<SignedIntLiteralConstant>{}(
signedDigitString, maybe(underscore >> kindParam))) /
spaceCheck)
signedDigitString, maybe(underscore >> kindParam))))
// R708 int-literal-constant -> digit-string [_ kind-param]
TYPE_PARSER(construct<IntLiteralConstant>{}(
space >> digitString, maybe(underscore >> kindParam)) /
spaceCheck)
space >> digitString, maybe(underscore >> kindParam)))
// R709 kind-param -> digit-string | scalar-int-constant-name
TYPE_PARSER(construct<KindParam>{}(digitString / spaceCheck) ||
TYPE_PARSER(construct<KindParam>{}(digitString) ||
construct<KindParam>{}(scalar(integer(constant(name)))))
// R712 sign -> + | -
@ -755,8 +753,7 @@ TYPE_CONTEXT_PARSER("REAL literal constant"_en_US,
"."_ch >> digitString >> maybe(exponentPart) >> ok ||
digitString >> exponentPart >> ok) >>
construct<RealLiteralConstant::Real>{}),
maybe(underscore >> kindParam)) /
spaceCheck)
maybe(underscore >> kindParam)))
// R718 complex-literal-constant -> ( real-part , imag-part )
TYPE_CONTEXT_PARSER("COMPLEX literal constant"_en_US,