Concepts of Programming Languages

160 Chapter 3 Describing Syntax and Semantics Using this as the postcondition for the first assignment in the loop body, {P} fac ...

Bibliographic Notes 161 some of the statements of programming languages has proven to be a difficult task. An obvious solution t ...

162 Chapter 3 Describing Syntax and Semantics The technique of using preconditions and postconditions during the devel- opment o ...

Problem Set 163 What is the problem with using a software pure interpreter for opera- tional semantics? Explain what the precon ...

164 Chapter 3 Describing Syntax and Semantics Prove that the following grammar is ambiguous: <S> → <A> <A> → ...

Problem Set 165 Convert the BNF of Example 3.1 to EBNF. Convert the BNF of Example 3.3 to EBNF. Convert the following EBNF to B ...

166 Chapter 3 Describing Syntax and Semantics b. a = 3 (2 b + a); b = 2 * a - 1 {b > 5} Compute the weakest precondition f ...

167 4.1 Introduction 4.2 Lexical Analysis 4.3 The Parsing Problem 4.4 Recursive-Descent Parsing 4.5 Bottom-Up Parsing 4 Lexical ...

168 Chapter 4 Lexical and Syntax Analysis A serious investigation of compiler design requires at least a semester of intensive s ...

4.2 Lexical Analysis 169 years the use of Just-in-Time ( JIT) compilers has become widespread, particu- larly for Java programs ...

170 Chapter 4 Lexical and Syntax Analysis of pattern matching was with text editors, such as the ed line editor, which was intro ...

4.2 Lexical Analysis 171 There are three approaches to building a lexical analyzer: Write a formal description of the token pat ...

172 Chapter 4 Lexical and Syntax Analysis class named DIGIT for digits and use a single transition on any character in this char ...

4.2 Lexical Analysis 173 /* Function declarations */ void addChar(); void getChar(); void getNonBlank(); int lex(); /* Character ...

174 Chapter 4 Lexical and Syntax Analysis /******************************************************/ /* main driver */ main() { /* ...

4.2 Lexical Analysis 175 case '/': addChar(); nextToken = DIV_OP; break; default: addChar(); nextToken = EOF; break; } return ne ...

176 Chapter 4 Lexical and Syntax Analysis / *****************************************************/ /* lex - a simple lexical ana ...

4.3 The Parsing Problem 177 printf("Next token is: %d, Next lexeme is %s\n", nextToken, lexeme); return nextToken; } /* End of f ...

178 Chapter 4 Lexical and Syntax Analysis 4.3.1 Introduction to Parsing Parsers for programming languages construct parse trees ...

4.3 The Parsing Problem 179 4.3.2 Top-Down Parsers A top-down parser traces or builds a parse tree in preorder. A preorder trave ...