| // Reverse Polish Notation, abs.k | |
| // © 2001, Michael Piefel <piefel@informatik.hu-berlin.de> | |
| // The abstract syntax of our expressions | |
| line: | |
| Line(expression); | |
| term: | |
| Number(integer) | Ident(casestring); | |
| expression: | |
| Term( term ) | |
| | Plus( expression expression ) | |
| | Mul( expression expression ) | |
| | Minus( expression expression ) | |
| | Div( expression expression ) | |
| | Div2( expression casestring expression ) | |
| ; | |