Introduction - If you have any usage issues, please Google them yourself
Grammar analysis is a logical compile process stage. The task of grammatical analysis is in a separate lexical analysis on the basis of the combination of all kinds of grammar words sequence into phrases, such as "program", "statements", "expression" and so on. Grammar analysis program judgment in the structure of the source program is correct. The structure of the source program by context-free grammar description. Grammar analysis program can use YACC tools such as automatic generation