4. Parser C-Language Interface

The Bison parser is actually a C function named yyparse. Here we describe the interface conventions of yyparse and the other functions that it needs to use.

Keep in mind that the parser uses many C identifiers starting with ‘yy’ and ‘YY’ for internal purposes. If you use such an identifier (aside from those in this manual) in an action or in epilogue in the grammar file, you are likely to run into trouble.

4.1 The Parser Function `yyparse`		How to call `yyparse` and what it returns.
4.2 The Push Parser Function `yypush_parse`		How to call `yypush_parse` and what it returns.
4.3 The Pull Parser Function `yypull_parse`		How to call `yypull_parse` and what it returns.
4.4 The Parser Create Function `yystate_new`		How to call `yypstate_new` and what it returns.
4.5 The Parser Delete Function `yystate_delete`		How to call `yypstate_delete` and what it returns.
4.6 The Lexical Analyzer Function `yylex`		You must supply a function `yylex` which reads tokens.
4.7 The Error Reporting Function `yyerror`		You must supply a function `yyerror`.
4.8 Special Features for Use in Actions		Special features for use in actions.
4.9 Parser Internationalization		How to let the parser speak in the user's native language.