Chapter 9. Advanced Tokenizing

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	Building Parsers with Java By Steven  John  Metsker
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Tokenizing a string means dividing the string into logical chunks , or tokens . This lets you define a grammar in terms of token terminals, something that is much simpler than defining a grammar in terms of every character in an input stream. Simpler grammars translate into simpler parsers, so tokenizing reduces the complexity of a parser. This chapter explains how tokenizing works and describes techniques for controlling in detail how sequences of characters form tokens.

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