Alex is a tool for generating lexical analysers in Haskell.

Alex is a tool for generating lexical analysers in Haskell. It takes a description of tokens based on regular expressions and generates a Haskell module containing code for scanning text efficiently. It is similar to the tool lex or flex for C/C++.

Alex: A Lexical Analyser Generator

Alex is a tool for generating lexical analysers, also known as "lexers" and "scanners", in Haskell. The lexical analysers implement a description of the tokens to be recognised in the form of regular expressions. It is similar to the tools "lex" and "flex" for C/C++.

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Documentation

Documentation is hosted on Read the Docs:

• Online (HTML)
• PDF
• Downloadable HTML

For basic information of the sort typically found in a read-me, see the following sections of the docs:

• About Alex
• Obtaining Alex
• Contributing.