unkindpartition / lexer-applicative Goto Github PK
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License: MIT License
Applicative lexer
License: MIT License
Any plans to get lexer-applicative
on Stackage?
Is it possible to build recognizers and runLexer
that work on Text
rather than the hardcoded Char
and String
?
Thank you for these projects.
The following result hangs:
{-# LANGUAGE OverloadedStrings #-}
import Language.Lexer.Applicative (tokens)
import Text.Regex.Applicative
import qualified Data.Loc as Loc
import qualified Data.Char as Char
type Token = Integer
token :: RE Char Token
token = "one" *> pure 1
spaces :: RE Char ()
spaces = (many $ psym Char.isSpace) *> pure ()
result :: [Loc.L Token]
result = tokens token spaces "filename" "one -"
With a sufficiently new base the build fails due to missing Semigroup
instances for Lexer
and Recognizer
.
Thank you for this lovely work!
As the title, I wonder if runLexer
, or the whole package in general, is capable of converting a stream of chars into tokens incrementally?
(looking suspicious!)
https://github.com/feuerbach/lexer-applicative/blob/7905a6373d7f6bd7b85a52f5aa7a12ab2cec2510/src/Language/Lexer/Applicative.hs#L280-L284
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