Yacc/Lex grammar

101 Uses for a Yacc

A parser generator such as Yacc/lex is how you get the front end of a compiler out quickly. It takes a description of the language, and gives you a C program (yes, I know, where is the Pascal generation version) that parses an input Pascal program and passes this information to the back end, the intermediate or direct machine code encoder.
Thats the good news. The bad news is that it leaves the major part of the compiler, the semantics, undone.
However, there are many reasons you might want to use a generated front end:
  Or, you might want to actually build a compiler.

pascal.y    Contains the yacc parser generator specification.

pascal.l    Contains the lex scanner generator specification.

For more information contact: Scott A. Moore samiam@moorecad.com