What does yyparse do in lex?

Answer 1

In the context of Lex and Yacc, yyparse is a function generated by Yacc (Yet Another Compiler Compiler) that facilitates the parsing of input based on a defined grammar. It reads tokens produced by the Lex scanner, typically generated by the lex tool, and constructs a parse tree or performs actions based on the grammar rules specified in the Yacc input file. Essentially, yyparse acts as the interface between the lexical analysis performed by Lex and the syntactic analysis performed by Yacc. It manages the parsing state and handles errors in the input according to the defined grammar.