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Add a function to take a range & substring & continue.

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Rob Rix 2015-12-14 16:20:09 -05:00
parent 9e4071eb35
commit be9e4c7a01
1 changed files with 1 additions and 0 deletions
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src/Range.hs
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@ -20,6 +20,7 @@ rangesAndWordsFrom startIndex string = case break (not . isWord) string of
([], rest) | (whitespace, rest) <- break isWord rest -> rangesAndWordsFrom (startIndex + length whitespace) rest
(word, rest) -> (Range startIndex $ startIndex + length word, word) : case break isWord rest of (whitespace, rest) -> rangesAndWordsFrom (startIndex + length word + length whitespace) rest
where
takeAndContinue (parsed, rest) = (Range startIndex $ startIndex + length parsed, parsed) : rangesAndWordsFrom (startIndex + length parsed) rest
parse predicate string = case span predicate string of
([], _) -> Nothing
(parsed, rest) -> Just (parsed, rest)