| /* | |
| * Classic example grammar, which recognizes simple arithmetic expressions like | |
| * "2*(3+4)". The parser generated from this grammar then computes their value. | |
| */ | |
| start | |
| = additive | |
| additive | |
| = left:multiplicative "+" right:additive { return left + right; } | |
| / multiplicative | |
| multiplicative | |
| = left:primary "*" right:multiplicative { return left * right; } | |
| / primary | |
| primary | |
| = integer | |
| / "(" additive:additive ")" { return additive; } | |
| integer "integer" | |
| = digits:[0-9]+ { return parseInt(digits.join(""), 10); } |