8073613: Here documents: how to avoid string interpolation?

Support heredoc end marker quoting like in bash

Reviewed-by: attila, hannesw

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/parser/Lexer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2015, 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
@@ -1451,9 +1451,22 @@ public class Lexer extends Scanner {
                 skip(3);
             }
 
-            // Scan identifier.
+            // Scan identifier. It might be quoted, indicating that no string editing should take place.
+            final char quoteChar = ch0;
+            final boolean noStringEditing = isStringDelimiter(quoteChar);
+            if (noStringEditing) {
+                skip(1);
+            }
             final int identStart = position;
             final int identLength = scanIdentifier();
+            if (noStringEditing) {
+                if (ch0 != quoteChar) {
+                    error(Lexer.message("here.non.matching.delimiter"), last, position, position);
+                    restoreState(saved);
+                    return false;
+                }
+                skip(1);
+            }
 
             // Check for identifier.
             if (identLength == 0) {
@@ -1523,7 +1536,7 @@ public class Lexer extends Scanner {
             }
 
             // Edit string if appropriate.
-            if (scripting && !stringState.isEmpty()) {
+            if (!noStringEditing && !stringState.isEmpty()) {
                 editString(STRING, stringState);
             } else {
                 // Add here string.

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/resources/Messages.properties

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2010, 2015, 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
@@ -31,6 +31,7 @@ lexer.error.strict.no.octal=cannot use octal escapes in strict mode
 lexer.error.json.invalid.number=Invalid JSON number format
 lexer.error.invalid.escape.char=Invalid escape character
 lexer.error.illegal.identifier.character=Illegal character in identifier
+lexer.error.here.non.matching.delimiter=Quoted here string end marker must have matching delimiters
 
 parser.error.illegal.continue.stmt=Illegal continue statement
 parser.error.illegal.break.stmt=Illegal break statement

nashorn/test/script/nosecurity/JDK-8073613.js

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+/**
+ * JDK-8073613: Here documents: how to avoid string interpolation?
+ *
+ * @test
+ * @option -scripting
+ * @run
+ */
+
+var a = 2,
+    b = 3
+
+print(<<EOD)
+${a}${b}
+EOD
+
+print(<<"EOD")
+${a}${b}
+EOD
+
+print(<<'EOM')
+${a}${b}
+EOM
+
+print(<<`EOM`)
+${c}
+EOM
+
+print(<<"EOM")
+$\{a}
+EOM
+

nashorn/test/script/nosecurity/JDK-8073613.js.EXPECTED

@@ -0,0 +1,5 @@
+23
+${a}${b}
+${a}${b}
+${c}
+$\{a}