'Left recursive grammar' presentation slideshows

Chapter-3 Scanning and Parsing

Chapter-3 Scanning and Parsing. Scanning. Scanning is process of recognizing the lexical components in a source string. Lexical features of a language can be specified using Type-3 or regular grammars. Reasons for separating scanning from parsing.

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Ambiguity, Precedence, Associativity & Top-Down Parsing

Ambiguity, Precedence, Associativity & Top-Down Parsing. Lecture 9-10 (From slides by G. Necula & R. Bodik). Administrivia. Team assignments this evening for all those not listed as having one. HW#3 is now available, due next Tuesday morning (Monday is a holiday). Remaining Issues.

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Chapter 4

Chapter 4. Chang Chi-Chung 2007.5.17. The Role of the Parser. Token. Lexical Analyzer. Parser. Rest of Front End. intermediate representation. Parse tree. Source Program. getNextToken. Symbol Table. The Types of Parsers for Grammars. Universal (any CFG) Cocke-Younger-Kasimi

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Chapter 4 (b) parsing

Chapter 4 (b) parsing. Parsing. A grammar describes the strings of tokens that are syntactically legal in a PL A recogniser simply accepts or rejects strings. A generator produces sentences in the language described by the grammar

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BNF

BNF. BNF. BNF stands for either Backus-Naur Form or Backus Normal Form BNF is a metalanguage used to describe the grammar of a programming language BNF is formal and precise BNF is a notation for context-free grammars BNF is essential in compiler construction. BNF.

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LESSON 07

LESSON 07. Overview of Previous Lesson(s). Over View. Context Free Grammar is used to specify the syntax of the language. A grammar describes the hierarchical structure of most programming language constructs. It has components A set of tokens (terminal symbols) A set of nonterminals

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Syntax Analysis / Parser

Syntax Analysis / Parser. Parser works on a stream of tokens. The smallest item is a token. token. source program. parse tree. get next token. Syntax Analysis.

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LING 388: Language and Computers

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Syntax Analysis

Syntax Analysis. Sections 4.1-4.4:. Removing Ambiguity. Take Original Grammar:. stmt ? if expr then stmt | if expr then stmt else stmt | other (any other statement) Or to write more simply: S ? i E t S | i E t S e S

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