parser: parseBinaryExpr check tuple

goplus · Jul 4, 2022 · 8c96f79 · 8c96f79
1 parent ba0cf41
commit 8c96f79
Showing 1 changed file with 10 additions and 4 deletions.
diff --git a/parser/parser.go b/parser/parser.go
@@ -2026,20 +2026,26 @@ func (p *parser) parseBinaryExpr(lhs bool, prec1 int, allowTuple, allowCmd bool)
 		defer un(trace(p, "BinaryExpr"))
 	}
 
-	if x, isTuple = p.parseUnaryExpr(lhs, allowTuple, allowCmd); isTuple {
-		return
-	}
+	x, isTuple = p.parseUnaryExpr(lhs, allowTuple, allowCmd)
 	for {
 		op, oprec := p.tokPrec()
 		if oprec < prec1 {
 			return
 		}
+		if isTuple {
+			p.error(x.(*tupleExpr).opening, "tuple is not supported")
+			return
+		}
 		pos := p.expect(op)
 		if lhs {
 			p.resolve(x)
 			lhs = false
 		}
-		y, _ := p.parseBinaryExpr(false, oprec+1, false, false)
+		y, yIsTuple := p.parseBinaryExpr(false, oprec+1, true, false)
+		if yIsTuple {
+			p.error(y.(*tupleExpr).opening, "tuple is not supported")
+			return
+		}
 		x = &ast.BinaryExpr{X: p.checkExpr(x), OpPos: pos, Op: op, Y: p.checkExpr(y)}
 	}
 }