Compiler design: theory, tools, and examples by Seth D. Bergmann

By Seth D. Bergmann

This is often an introductory point textual content for compiler layout classes, that emphasizes challenge fixing abilities. The ideas are basically awarded with sampler difficulties and diagrams to demonstrate the ideas. The textual content additionally covers lex and yacc compiler producing instruments in UNIX.

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Example text

51): bog, cab, bc, cb, h33, h22, cater. Show a single hash function for a hash table consisting of ten linked lists such that none of the word sequences shown below causes a single collision. (a) (b) (c) 7. 53 ab, ac, ad, ae ae, bd, cc, db aa, ba, ca, da Show a sequence of four identifiers which would cause your hash function in Problem 6 to generate a collision for each identifier after the first. 4 Lex The Unix programming environment includes several utility programs which are intended to improve the programmer’s productivity.

For example, “abc” and “cba” are different strings, as are “abb” and “ab”. The string which consists of no characters is still a string (of characters from the given alphabet), and we call it the null string and designate it by ε. e. strings from the alphabet {0,1}), then ε is a string of zeros and ones. In this and following chapters, we will be discussing languages. A (formal) language is a set of strings from a given alphabet. In order to understand this, it is critical that the student understand the difference between a set and a string and, in particular, the difference between the empty set and the null string.

2. 1. 4 } // ax + 3; (c) if/*if*/a)}+whiles Since C/C++ are free format, newline characters are ignored during lexical analysis (except to serve as white space delimiters and to count lines for diagnostic purposes). Name at least two high-level programming languages for which newline characters would not be ignored for syntax analysis. 1 Lexical Tokens 3. Which of the following will cause an error message from your C++ compiler? 2 Implementation with Finite State Machines Finite state machines can be used to simplify lexical analysis.

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