Copyright Mind Reader Publications www.journalshub.com Component Compilers

In the computer industry, there are techniques that must be learned to achieve a successful career. One of these techniques is learning a computer language and compiling programs using that language. Compilers take a language and after a strenuous process, convert the programming language into a computer-understandable program. Compilers are generally made to deal with a single language using the predefined word and grammar to achieve a goal. The compiler is complex and can take a large amount work to get complete and efficient. With the creation of compilation components, like Yacc and Lex, programmers can have a compiler that is more generalized for languages, abandoning half of a compiler’s code (still requiring a semantic analyzer, code generator, and code optimizer) and still yielding the same results as a fully-coded compiler. Narrative Yacc is a parser generator created for Unix systems. Yacc stands for “Yet Another Compiler Compiler”. It was developed at AT&T by Stephen C. Johnson (who is known for developing the Portable C Compiler, as well as some Unix tools). Yacc takes an input file which explains Backus-Naur formalisms (BNF) for the language. BNFs are “widely used as a notation for the grammars of computer programming languages, instruction sets and communications protocols, as well as a notation for representing parts of natural language grammars (for example