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Write your own parser with JParsec

Introduction to parsers and JParsec

Waruzjan Shahbazian

on 16 June 2011

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Transcript of Write your own parser with JParsec

Write your own Parser with JParsec Waruzjan Shahbazian ANTLR: Parser Generator Regular Expression (?:([^=,;:]+):(?:(?:([^=,;:]+)=([^=,;:]+))(?:,(?:([^=,;:]+)=([^=,;:]+)))*)(?:;([^=,;:]+):(?:(?:([^=,;:]+)=([^=,;:]+))(?:,(?:([^=,;:]+)=([^=,;:]+)))*))*?) Lexical Tokens Parse Tree Ambiguity An example position := initial + rate * 60 1 2 3 4 Interpreter Case: Advanced URL Query Parser Grammar: Customer:id=134;Proposal:id=2,customerid=1 Example: Customer:id=134,Proposal:id=2,customerid=1 Bookmarkable AJAX application Rascal: Meta Programming Language JParsec: parser combinator framework Use Cases Domain Specific Languages Filters Data migration Definitions Parsing: Analysing a text
sequence of tokens (e.g. words)
to determine its grammatical structure
with respect to a given formal grammar. Parser: One of the components in an
interpreter or compiler, which checks for
correct syntax and builds a data structure. Result Calculator Parsec:parser combinator library for Haskell
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