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[flang] Update documentation. 

Original-commit: flang-compiler/f18@7045fbcd0c
Reviewed-on: https://github.com/flang-compiler/f18/pull/35
Tree-same-pre-rewrite: false
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peter klausler 2018-03-29 16:53:10 -07:00
parent d2d155f9a2
commit 522d345f12
1 changed files with 7 additions and 4 deletions
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11
flang/documentation/ParserCombinators.md
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@ -114,13 +114,16 @@ Last, we have these basic parsers on which the actual grammar of the Fortran
is built. All of the following parsers consume characters acquired from
`nextCh`.
* `spaces` always succeeds after consuming any spaces or tabs
* `space` always succeeds after consuming any spaces
* `spaceCheck` always succeeds after consuming any spaces, and can emit
a warning if there was no space in free form code before a character
that could continue a name or keyword
* `digit` matches one cooked decimal digit (0-9)
* `letter` matches one cooked letter (A-Z)
* `"..."_tok` match the content of the string, skipping spaces before and
after, and with multiple spaces accepted for any internal space.
(Note that the `_tok` suffix is optional when the parser appears before
the combinator `>>` or after `/`.)
after. Internal spaces are optional matches; `~` denotes a space that
is not optional in free form. The `_tok` suffix is optional when the
parser appears before the combinator `>>` or after `/`.
* `parenthesized(p)` is shorthand for `"(" >> p / ")"`.
* `bracketed(p)` is shorthand for `"[" >> p / "]"`.
* `nonEmptyListOf(p)` matches a comma-separated list of one or more