May 2024
Intermediate to advanced
536 pages
17h 10m
English
Content preview from Compilers: Principles and Practice by Pearson
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Lexical Analyzer 51
We shall assume that the reader has some background in formal languages and Automata, but it is
strongly suggested that the material in Appendix A be reviewed. We have defined and explained some
of the terms – sentential form, phrase, simple phrase and handle – used in the discussion of parsing
in Section A.5.2.
We shall see the full details of parsing in Chapter 4 on Parser.
3.1 Scanner
The job of a Scanner or lexical analyzer is identifying low-level language constructs – language
atoms like identifiers, keywords, numbers, operators, string literals, etc. As these constructs can be
represented as regular languages, a Scanner ...
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