Download A Practical Approach to Compiler Construction by Des Watson PDF

By Des Watson

This e-book offers a practically-oriented advent to high-level programming language implementation. It demystifies what is going on inside of a compiler and stimulates the reader's curiosity in compiler layout, a vital element of laptop technology. Programming language research and translation innovations are utilized in many software program program areas.

A functional method of Compiler Construction covers the elemental rules of the topic in an obtainable approach. It provides the required heritage conception and exhibits the way it may be utilized to enforce whole compilers. A step by step strategy, in line with a typical compiler constitution is followed, proposing updated suggestions and examples. ideas and designs are defined intimately to lead the reader in enforcing a translator for a programming language.

A easy high-level language, loosely in accordance with C, is used to demonstrate facets of the compilation strategy. Code examples in C are incorporated, including dialogue and representation of the way this code should be prolonged to hide the compilation of extra advanced languages. Examples also are given of using the flex and bison compiler construction instruments. Lexical and syntax research is roofed intimately including a entire insurance of semantic research, intermediate representations, optimisation and code iteration. Introductory fabric on parallelisation can be included.

Designed for private examine in addition to to be used in introductory undergraduate and postgraduate classes in compiler layout, the writer assumes that readers have an inexpensive competence in programming in any high-level language.

 

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Extra info for A Practical Approach to Compiler Construction

Sample text

Expr> ::= | + | - ::= | * | / ::= | () ::= | ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 Fig. 3 BNF for simple arithmetic expressions These rules define the syntax of simple arithmetic expressions using integer values, the operators +, -, * and /, together with parentheses for grouping. Expressions such as 2+3+4/5 and 2+3*(44-567) can be generated via this set of BNF rules.

For example, the rules may state that “an identifier can be arbitrarily long but only the first six characters are significant”, implying that, for example, abc123x and abc123y are both allowed but are equivalent. Context sensitivity issues arise in a lexical analyser when the nature of a lexical token may depend not only on its composition in terms of characters but also on its 42 3 Lexical Analysis context. For example, in C, identifiers declared by the typedef declaration may need special treatment in the lexical analyser.

There are several different variants of the low-level syntax of BNF-like metalanguages, but one variant became popular after its use in the ISO Pascal Standard [2]. This variant was called Extended Backus–Naur Form (EBNF). It retains the basic principles of BNF but the syntactic detail is a little different. The BNF example above can be translated easily into EBNF as follows: expr = term | expr "+" term | expr "-" term. term = factor | term "*" factor | term "/" factor. factor = integer | "("expr")".

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