Fixing the issue that stopped this from parsing correctly: 'sum = x y \ x + y; sum 5 3'

src/parser.ts

@@ -122,7 +122,7 @@ export class Parser {
         const nameToken = this.expect('ident');
         const name = (nameToken as { value: string }).value;
         this.expect('equals');
-        const value = this.parseInfix();
+        const value = this.parseExpression();
         this.expect('semicolon');
         const body = this.parseExpression();