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							- import {InfixApp} from './infixApp';
 
- export class UnaryApp extends InfixApp {
 
-   
 
-   constructor (op, left) {
 
-     super(op, left, null);
 
-   }
 
-   toString () {
 
-     const l = this.left.toString();
 
-     const op = this.op.value;
 
-     if(this.parenthesis) {
 
-       return `(${op + l})`;
 
-     } else {
 
-       return op + l;
 
-     }
 
-   }
 
- }
 
 
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