You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
8 lines
155 B
Racket
8 lines
155 B
Racket
3 years ago
|
#lang yaragg
|
||
8 years ago
|
|
||
|
|
expr : term (/'+' term)*
|
||
|
|
@term : factor (/'*' @factor)*
|
||
|
|
factor : ("0" | "1" | "2" | "3"
|
||
|
|
| "4" | "5" | "6" | "7"
|
||
|
|
| "8" | "9")+
|