GettingStarted.lhs

Introduction to parsing with Parsec, including a review of Text.Parsec.Char functions.

VerySimpleExpressions.lhs

Creating a very simple expression language parser, and introducing some functions from Text.Parsec.Combinator.

ApplicativeStyle.lhs

Rewriting the simple expression parser code in a more succinct style.

CombinatorReview.lhs

Review and examples of all functions from Text.Parsec.Combinator, and some from Control.Applicative and Control.Monad.

FunctionsAndTypesForParsing.lhs

The utility functions used in the previous tutorials, plus some notes on types in Parsec.

TextParsecExpr.lhs

This covers using the Text.Parsec.Expr for expression parsing with prefix, postfix and infix operators with fixity.

AnIssueWithTokenParsers.lhs

Looks at an issue we have with the way the symbol parser in the Text.Parsec.Expr tutorial was used, and some possible fixes.

TextParsecPerm.lhs

This covers the Text.Parsec.Perm module which is used for parsing different things in flexible order.

TextParsecToken.lhs

This covers Text.Parsec.Token which can be used to create token parsers easily.

ValueExpressions.lhs

This covers building a parser a subset of value expressions from SQL, which are an extension of the simple expression types and parsers covered in previous tutorials.

QueryExpressions.lhs

This covers building a parser to parse query expressions with select lists, simple from, where, group by, having and order by.

FromClause.lhs

This extend the parser for query expressions to support a from clause with much more features including joins.

SimpleSQLQueryParser0.lhs

Here is the code from ValueExpressions, QueryExpressions and FromClause plus tests put together and rearranged as a coherent standalone module.

PrettyPrinting0.lhs

This quick module covers a simple pretty printer for our SQL ast.

ErrorMessages.lhs

In this document, we will explore error messages with parsec and how restructuring parser code can lead to better or worse error messages.

If you are interested in SQL parsing, check out the project to build a complete SQL parser here: http://jakewheat.github.io/simple-sql-parser/latest. The parsing code in the simple-sql-parser project is based on this tutorial code.

• ParseString.lhs

an executable which contains the boilerplate to run a parsec parser on a string passed as an argument

• ParseFile.lhs

an executable which contains the boilerplate to run a parsec parser on a file passed as an argument

Contact: [email protected]

License: BSD3