004 Datenverarbeitung; Informatik
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A domain specific language for the automatic generation of parsers classes for text protocols
(2014)
ABNF is a language for the definition of the formal syntax of technical specifications and is widely used for the definition of textual protocol messages of many internet protocols. The automatic generation of parser classes for ABNF specifications is currently very limited, because ABNF only defines the transfer syntax of the text messages and does not define names for the set of production rules. The lack of name definitions within ABNF rules does not allow to automatically generate expressiveness and meaningful program code for ABNF specifications. In this paper we present X-ABNF, which is a domain-specific language (DSL) for the definition of name-bindings for ABNF rules. The name-bindings with X-ABNF facilitates to generate a concise and meaningful code for an ABNF specification. Additionally, we show that the name-binding can also be used for language extensions through macro programming to dynamically access ABNF encoded text data within source code. We have used Xtext and Xtend for the implementation of the language grammar of ABNF and X-ABNF, which provide good tool support and code generation capabilities.