Node:Interface, Next:Algorithm, Previous:Grammar File, Up:Top

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 additional C code in the grammar file, you are likely to run into trouble.

• Parser Function: How to call yyparse and what it returns.
• Lexical: You must supply a function yylex which reads tokens.
• Error Reporting: You must supply a function yyerror.
• Action Features: Special features for use in actions.