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C H A P T E R T W O Syntax
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Parse Tree for 352 As an Integer
Figure 2.1
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A Program Fragment Viewed As a Stream of Tokens
Figure 2.2
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A Simple Lexical Syntax for a Small Language, Jay
Figure 2.3
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Major Stages in the Compiling Process
Figure 2.4
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Skeleton Lexical Analysis Method That Returns Tokens
Figure 2.5
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Conventions for Writing Regular Expressions
Figure 2.6
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A Concrete Syntax for Assignments and Expressions
Figure 2.7
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Parse Tree for the Expression x+2*y
Figure 2.8
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Sketch of a Parse Tree for a Complete Program
Figure 2.9
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Two Different Parse Trees for the AmbExp 2 – 3 – 4
Figure 2.10
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An Ambiguous If Statement
Figure 2.11
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The “Dangling Else” Grammatical Ambiguity
Figure 2.12
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EBNF-Based Parse Tree for the Expression x+2*y
Figure 2.13
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Syntax Diagram for Expressions with Addition
Figure 2.14
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Abstract Syntax for Expression, Assignment, and Loop
Figure 2.15
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(a) Structure of a Binary Node
(a) Structure of a Binary Node. (b) Abstract Syntax Tree for the Expression x+2*y Figure 2.16
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Partially Completed Recursive Descent Parse for Assignments
Figure 2.17
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Algorithm for Writing a Recursive Parser from EBNF
Figure 2.18
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An Example Jay Program to Compute the nth Fibonacci Number
Figure 2.19
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Sketch of the Abstract Syntax of a Jay WhileStatement
Figure 2.20
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