Allow "<NUL>" character within string literals in strict mode

JerryScript-DCO-1.0-Signed-off-by: Yanhui Shen shen.elf@gmail.com

jerry-core/parser/js/js-lexer.c

@@ -615,6 +615,16 @@ lexer_parse_string (parser_context_t *context_p) /**< context */
         continue;
       }
 
+      if (*source_p == LIT_CHAR_0
+          && source_p + 1 < source_end_p
+          && (*(source_p + 1) < LIT_CHAR_0 || *(source_p + 1) > LIT_CHAR_9))
+      {
+        source_p++;
+        column++;
+        length++;
+        continue;
+      }
+
       /* Except \x, \u, and octal numbers, everything is
        * converted to a character which has the same byte length. */
       if (*source_p >= LIT_CHAR_0 && *source_p <= LIT_CHAR_3)

tests/jerry/strict.js

@@ -70,6 +70,52 @@ try
   assert (e instanceof TypeError);
 }
 
+try
+{
+  eval ("'\\" + "101'");
+
+  assert (false);
+} catch (e)
+{
+  assert (e instanceof SyntaxError);
+}
+
+try
+{
+  var str1 = "'\\" + "0'";
+  var str2 = "'\\x" + "00'";
+  eval (str1);
+
+  assert (eval (str1) === eval (str2));
+} catch (e)
+{
+  assert (false);
+}
+
+try
+{
+  var str1 = "'\\" + "0" + "\\" + "0" + "\\" + "0'";
+  var str2 = "'\\x" + "00" + "\\x" + "00" + "\\x" + "00'";
+  eval (str1);
+
+  assert (eval (str1) === eval (str2));
+} catch (e)
+{
+  assert (false);
+}
+
+try
+{
+  var str1 = "'foo\\" + "0" + "bar'";
+  var str2 = "'foo\\x" + "00" + "bar'";
+  eval (str1);
+
+  assert (eval (str1) === eval (str2));
+} catch (e)
+{
+  assert (false);
+}
+
 (function (a) {
   (function (a) {
   });