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I am pleased to announce version 3.0 of Alex, the lexical analyser
generator for Haskell.
Changes in Alex 3.0 vs. 2.3.5:
* Unicode support (contributed mostly by Jean-Philippe Bernardy,
with help from Alan Zimmerman).
* An Alex lexer now takes a UTF-8 encoded byte sequence as input
(see Section 5.1, “Unicode and UTF-8”. If you are using the
"basic" wrapper or one of the other wrappers that takes a
Haskell String as input, the string is automatically encoded
into UTF-8 by Alex. If your input is a ByteString, you are
responsible for ensuring that the input is UTF-8 encoded. The
old 8-bit behaviour is still available via the --latin1
* Alex source files are asumed to be in UTF-8, like Haskell
source files. The lexer specification can use Unicode
characters and ranges.
* alexGetChar is renamed to alexGetByte in the generated code.
* There is a new option, --latin1, that restores the old
* Alex now does DFA minimization, which helps to reduce the size
of the generated tables, especially for lexers that use Unicode.
Alex can be obtained from Hackage
Alex is distributed under a BSD-style license.