Abstract
Arpeggio is a recursive descent parser with full backtracking and memoization based on PEG (Parsing Expression Grammar) grammars. This category of parsers is known as packrat parsers. It is implemented in the Python programming language and works as a grammar interpreter.Arpeggio has a very good support for error reporting, debugging, and grammar and parse tree visualization. It is used in industrial environments and teaching Domain-Specific Languages course at the Faculty of Technical Sciences in Novi Sad. Arpeggio is a foundation of a high-level DSL meta-language and tool - textX.It is a free and open-source software available at GitHub under MIT license.
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