PPT-Chapter 4 Syntax

1 2 Lexical Analysis converting a sequence of characters into a sequence of tokens Why split lexical analysis from parsing Simplifies design Parsers with whitespace and comments are more awkward. 1. Lexical and Syntactic Analysis. Chomsky Grammar Hierarchy. Lexical Analysis . –. Tokenizing. Syntactic Analysis – . Parsing. Lexical analysis is called . scanning . in your text.. Programming Languages. 2 &#x/MCI; 0 ;&#x/MCI; 0 ;(4) “I canlive without money, but I cannotlive without love.” Judy GarlandThere is no operator in PL to represent the different modes in which a proposit Chapter Three. Modern Programming Languages, 2nd ed.. 1. Three “Equivalent” Grammars. Chapter Three. Modern Programming Languages, 2nd ed.. 2. G1. : <. subexp. > ::= . a. | . b. | . c. | <. Types of Linguistic Theories. Prescriptive. : “prescriptive linguistics” is an oxymoron. Prescriptive grammar: . how people ought to talk. Descriptive. : provide account of syntax of a language. Descriptive grammar. Modern Programming Languages, 2nd ed.. 1. Syntax And Semantics. Programming language syntax: how programs look, their form and structure. Syntax is defined using a kind of formal grammar. Programming language semantics: what programs do, their behavior and meaning. Role of Semantic Analysis. . Following parsing, the next two phases of the "typical" compiler are . semantic analysis. (intermediate) code generation. The principal job of the semantic analyzer is to enforce static semantic rules. That arrangement contributes to and enhances meaning and effect.. Or more simply:. It’s how authors put words and phrases together. . Syntax helps authors effectively make their points.. One thing Syntax does is control pacing.. Chapter 3: Describing Syntax and Semantics. - Introduction. - The General Problem of Describing Syntax. - Formal Methods of Describing Syntax. - Attribute Grammars. - Describing the Meanings of Programs: Dynamic Semantics. Chapter 3 Topics. Introduction. The General Problem of Describing Syntax. Formal Methods of Describing Syntax. Attribute Grammars. Describing . the Meanings of Programs: Dynamic Semantics. 1-. 2. Introduction. Quick-write. Analyzing Syntax. Reading and questions. Chapter 7. Homework:. Chapter 7 – Reading and Questions. Take out:. Pen/Pencil. Homework. “Determining and Analyzing Syntax”. Notebook. The Great Gatsby. . “But what is the question?”. “To be or not to be, duh, that’s the question”. “yeah, I know, but what does that mean?”. Today’s Focus Questions:. Focus Questions. How can Yoda help us understand Shakespeare?. . “But what is the question?”. “To be or not to be, duh, that’s the question”. “yeah, I know, but what does that mean?”. Today’s Focus Questions:. Focus Questions. How can Yoda help us understand Shakespeare?. Chapter Eight Syntax Syntax When we concentrate on the structure and order of components within a sentence we are studying the syntax of a language. Syntax (from Greek) = ‘putting together’ In early approaches to syntax, there was a focus on the description of the ordering of elements in the When we concentrate on the structure and order of components within a . sentence. we are studying the . syntax. of a language.. Syntax (from Greek) = ‘putting together’. In early approaches to syntax, there was a focus on the description of the ordering of elements in the .