8285932: Implementation of JEP 430 String Templates (Preview)

Reviewed-by: mcimadamore, rriggs, darcy

test/langtools/tools/javac/diags/examples/StringTemplateUnclosedTextBlock.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2023, 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.
+ */
+
+ // key: compiler.note.preview.filename
+ // key: compiler.note.preview.recompile
+ // key: compiler.err.unclosed.text.block
+ // key: compiler.err.text.block.template.is.not.well.formed
+ // key: compiler.err.premature.eof
+ // options: --enable-preview -source 21
+
+import java.lang.*;
+
+class StringTemplateUnclosedTextBlock {
+    String m() {
+        int x = 10;
+        return STR."""
+                aaa
+                \{x
+                """
+        ;
+    }
+}