8326204: yield statements doesn't allow cast expressions with more than 1 type arguments

Reviewed-by: jlahoda

Author: biboudis

src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java

@@ -2894,12 +2894,15 @@ List<JCStatement> blockStatement() {
                         int lookahead = 2;
                         int balance = 1;
                         boolean hasComma = false;
+                        boolean inTypeArgs = false;
                         Token l;
                         while ((l = S.token(lookahead)).kind != EOF && balance != 0) {
                             switch (l.kind) {
                                 case LPAREN: balance++; break;
                                 case RPAREN: balance--; break;
-                                case COMMA: if (balance == 1) hasComma = true; break;
+                                case COMMA: if (balance == 1 && !inTypeArgs) hasComma = true; break;
+                                case LT: inTypeArgs = true; break;
+                                case GT: inTypeArgs = false;
                             }
                             lookahead++;
                         }

test/langtools/tools/javac/T8326204a.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8326204
+ * @summary yield statements doesn't allow cast expressions with more than 1 type arguments
+ * @compile T8326204a.java
+ */
+import java.util.*;
+
+public class T8326204a {
+    void testOneParam() {
+        Object value = new ArrayList<String>();
+        Object returnedValue = switch (1) {
+            default -> {
+                yield (List<String>) value;
+            }
+        };
+    }
+
+    void testTwoParams() {
+        Object value = new HashMap<String, String>();
+        Object returnedValue = switch (1) {
+            default -> {
+                yield (Map<String, String>) value;
+            }
+        };
+    }
+
+    void testTwoParamsInParens() {
+        Object value = new HashMap<String, String>();
+        Object returnedValue = switch (1) {
+            default -> {
+                yield ((Map<String, String>) value);
+            }
+        };
+    }
+}

test/langtools/tools/javac/T8326204b.java

@@ -0,0 +1,13 @@
+import java.util.Map;
+
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8326204
+ * @summary yield statements doesn't allow cast expressions with more than 1 type arguments
+ * @compile/fail/ref=T8326204b.out -XDrawDiagnostics --should-stop=at=FLOW -XDdev T8326204b.java
+ */
+public class T8326204b {
+    private static void t(int i) { yield((Map<String, String>) null, 2); }
+
+    private static void yield(Map<String, String> m, int j) { }
+}

test/langtools/tools/javac/T8326204b.out

@@ -0,0 +1,2 @@
+T8326204b.java:10:36: compiler.err.invalid.yield
+1 error