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Update words.x #275

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128c4d2
Update words.x
PiotrJustyna May 27, 2025
500c2c3
Update words.x
PiotrJustyna May 28, 2025
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17 changes: 15 additions & 2 deletions examples/words.x
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Original file line number Diff line number Diff line change
@@ -1,4 +1,17 @@
-- Performance test; run with input /usr/dict/words, for example
-- this is intended to be a performance test of an alex-generated lexer
-- * run with /usr/dict/words or equivalent, depending on your os, e.g.:
-- * mac os: /usr/share/dict/words
-- * alpine linux: available as a package
-- (https://pkgs.alpinelinux.org/packages?name=words&branch=edge&repo=&arch=&origin=&flagged=&maintainer=)
-- and when installed, available here: /usr/share/dict/ (the directory contains multiple languages)
-- * to generate lexer:
-- alex words.x
-- * to scan a basic string with the generated lexer using ghci:
-- $ ghci
-- ghci> :l words
-- ghci> alexScanTokens "word1 word2" (produces: ["word1","word2"])
-- * to run the performance test as intended, compile the lexer into an executable and run with:
-- time ./words.bin +RTS -s < /usr/dict/words
{
module Main (main) where
}
Expand All @@ -8,7 +21,7 @@ module Main (main) where
words :-

$white+ ;
[A-Za-z0-9\'\-]+ { \s -> () }
[A-Za-z0-9\'\-]+ { \s -> s }

{
main = do
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