'Ambiguous grammar' diaporamas de présentation

Compiler Construction Parsing Part I

792 views • 62 slides

Chapter 3

Chapter 3. Describing Syntax and 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. Introduction.

742 views • 56 slides

CSc 453 Syntax Analysis (Parsing)

CSc 453 Syntax Analysis (Parsing). Saumya Debray The University of Arizona Tucson. Overview. Main Task : Take a token sequence from the scanner and verify that it is a syntactically correct program. Secondary Tasks :

672 views • 56 slides

Syntax Trees

644 views • 55 slides

Syntax Trees

576 views • 55 slides

CS 152, Programming Paradigms Fall 2012, SJSU

604 views • 48 slides

CS 152, Programming Paradigms Fall 2011, SJSU

570 views • 44 slides

??? ???????

??? ???????. ??? ?? wkchen@pchome.com.tw ??????. ???? ????? ????? ?????? B.N.F. ?? ???. ??????? ?? else ?? ??????????? ????? ????. ??. ????. ??? ?????????????? ? ?????? ASCII Code Set EBCDIC Code Set. ascii table. ????. ASCII Code Set

602 views • 43 slides

??? ???????

??? ???????. ??? ?? wkchen@pchome.com.tw ??????. ???? ????? ????? ?????? B.N.F. ?? ???. ??????? ?? else ?? ??????????? ????? ????. ??. ????. ??? ?????????????? ? ?????? ASCII Code Set EBCDIC Code Set. ascii table. ????. ASCII Code Set

556 views • 43 slides

Grammars and ambiguity

Grammars and ambiguity. CS164 3:30-5:00 TT 10 Evans. Overview. derivations and parse trees different derivations produce may produce same parse tree ambiguous grammars what they are and how to fix them. Recall: derivations and parse trees. A derivation is a sequence of productions

600 views • 35 slides

Grammars and ambiguity

Grammars and ambiguity. CS164 3:30-5:00 TT 10 Evans. Overview. derivations and parse trees different derivations produce may produce same parse tree ambiguous grammars what they are and how to fix them. Recall: derivations and parse trees. A derivation is a sequence of productions

379 views • 35 slides

Parse Trees

Parse Trees. Definitions Relationship to Left- and Rightmost Derivations Ambiguity in Grammars. Parse Trees. Parse trees are trees labeled by symbols of a particular CFG. Leaves : labeled by a terminal or ? . Interior nodes : labeled by a variable.

346 views • 32 slides

Parse Trees

Parse Trees. Definitions Relationship to Left- and Rightmost Derivations Ambiguity in Grammars. Parse Trees. Parse trees are trees labeled by symbols of a particular CFG. Leaves : labeled by a terminal or ? . Interior nodes : labeled by a variable.

329 views • 32 slides

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.

356 views • 30 slides

Chapter V: Compiler

Overview: To study the design and operation of compiler for high-level programming languages. Contents Basic compiler (one-pass compiler) functions Machine-dependent extension : (object-code generation & code optimization)

515 views • 25 slides

258 views • 24 slides

Ambiguity in Grammar

Ambiguity in Grammar. By Dipendra Pratap Singh 04CS1032. Every ambiguous grammar fails to be LR. Certain types of ambiguous grammar are useful in the specification and implementation of the languages.

222 views • 19 slides

Chapter 3 - 2

Chapter 3 - 2. Construction Techniques. Section 3.3 Grammars. A grammar is a finite set of rules, called productions, that are used to describe the strings of a language.

236 views • 18 slides

Review

Lexical Analysis. RG & DFA. Grammar & Language. Top-down LL(1) Parsing Bottom-Up LR Layered Automation. Syntax Analysis. Attribute Grammar Type Checking. Semantic Analysis. Run-time Environment. TAC Quadruple(Backpatching). Intermediate Code generation. Stack Allocations.

313 views • 16 slides

Context-Free Grammars

306 views • 14 slides