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specified match precedence in lexer... hope I'm right

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John Clements 2013-05-01 07:51:40 -07:00
parent df319c2ee8
commit 27503c3ae9
1 changed files with 4 additions and 2 deletions
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6
collects/parser-tools/parser-tools.scrbl
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@ -51,8 +51,10 @@ style lexer and parser generators.
(id datum ...)])]{
Produces a function that takes an input-port, matches the
@racket[re]'s against the buffer, and returns the result of
executing the corresponding @racket[action-expr].
@racket[re] patterns against the buffer, and returns the result of
executing the corresponding @racket[action-expr]. When multiple
patterns match, a lexer will choose the longest match, breaking
ties in favor of the rule appearing first.
@margin-note{The implementation of @racketmodname[syntax-color/racket-lexer]
contains a lexer for the @racketmodname[racket] language.