NDLI: MetaLexer: a modular lexical specification language

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Modularity for the modern world: summary of invited keynote

MetaLexer: a modular lexical specification language

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MetaLexer: a modular lexical specification language

Content Provider	ACM Digital Library
Author	Casey, Andrew Hendren, Laurie
Abstract	Compiler toolkits make it possible to rapidly develop compilers and translators for new programming languages. Although there exist elegant toolkits for modular and extensible parsers, compiler developers must often resort to ad-hoc solutions when extending or composing lexers. This paper presents MetaLexer, a new modular lexical specification language and associated tool. MetaLexer allows programmers to define lexers in a modular fashion. MetaLexer modules can be used to break the lexical specification of a language into a collection smaller modular lexical specifications. Control is passed between the modules using the concept of meta-tokens and meta-lexing. MetaLexer modules are also extensible. MetaLexer has two key features: it abstracts lexical state transitions out of semantic actions and it makes modules extensible by introducing multiple inheritance. We have constructed a MetaLexer tool which converts MetaLexer specifications to the popular JFlex lexical specification language and we have used our tool to create lexers for three real programming languages and their extensions: AspectJ (and two AspectJ extensions), MATLAB (and the AspectMatlab extension), and MetaLexer itself. The new specifications are easier to read, are extensible, and require much less action code than the originals.
Starting Page	7
Ending Page	18
Page Count	12
File Format	PDF
ISBN	9781450306058
DOI	10.1145/1960275.1960279
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-03-21
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Modular lexing Scanner Lexer Meta-lexing Modular scanning
Content Type	Text
Resource Type	Article

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