added group

src/front/parse.ts

@@ -229,6 +229,10 @@ export class Parser {
             const value = Number(this.current.value);
             this.step();
             return ast.Node.create(loc, "IntExpr", { value });
+        } else if (this.eat("(")) {
+            const expr = this.parseExpr();
+            this.mustEat(")");
+            return expr;
         } else {
             this.mustEat("<expression>");
             throw new Error();

tests/operators.ethlang

@@ -5,6 +5,8 @@
 // expect: 2
 // expect: -5
 // expect: 123
+// expect: 10
+// expect: 14
 
 fn main()
 {
@@ -23,5 +25,8 @@ fn main()
     if not c {
         print_int(123);
     }
+
+    print_int(2 * 3 + 4);
+    print_int(2 * (3 + 4));
 }