Fix keyword parsing after use strict. (#3740)

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

tests/jerry/strict2.js

@@ -0,0 +1,82 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+function check_syntax_error (script)
+{
+  try
+  {
+    eval (script);
+    assert (false);
+  }
+  catch (e)
+  {
+    assert (e instanceof SyntaxError);
+  }
+}
+
+var
+  implements = 0,
+  private = 1,
+  public = 2,
+  interface = 3,
+  package = 4,
+  protected = 5,
+  let = 6,
+  yield = 7,
+  static = 8;
+
+check_syntax_error("'use strict'\nimplements")
+check_syntax_error("'use strict'\n\\u0069mplements")
+assert(eval("'use stric'\nimplements") === 0)
+assert(eval("'use stric'\n\\u0069mplements") === 0)
+
+check_syntax_error("'use strict'\nprivate")
+check_syntax_error("'use strict'\n\\u0070rivate")
+assert(eval("'use stric'\nprivate") === 1)
+assert(eval("'use stric'\n\\u0070rivate") === 1)
+
+check_syntax_error("'use strict'\npublic")
+check_syntax_error("'use strict'\n\\u0070ublic")
+assert(eval("'use stric'\npublic") === 2)
+assert(eval("'use stric'\n\\u0070ublic") === 2)
+
+check_syntax_error("'use strict'\ninterface")
+check_syntax_error("'use strict'\n\\u0069nterface")
+assert(eval("'use stric'\ninterface") === 3)
+assert(eval("'use stric'\n\\u0069nterface") === 3)
+
+check_syntax_error("'use strict'\npackage")
+check_syntax_error("'use strict'\n\\u0070ackage")
+assert(eval("'use stric'\npackage") === 4)
+assert(eval("'use stric'\n\\u0070ackage") === 4)
+
+check_syntax_error("'use strict'\nprotected")
+check_syntax_error("'use strict'\n\\u0070rotected")
+assert(eval("'use stric'\nprotected") === 5)
+assert(eval("'use stric'\n\\u0070rotected") === 5)
+
+check_syntax_error("'use strict'\nlet")
+check_syntax_error("'use strict'\n\\u006cet")
+assert(eval("'use stric'\nlet") === 6)
+assert(eval("'use stric'\n\\u006cet") === 6)
+
+check_syntax_error("'use strict'\nyield")
+check_syntax_error("'use strict'\n\\u0079ield")
+assert(eval("'use stric'\nyield") === 7)
+assert(eval("'use stric'\n\\u0079ield") === 7)
+
+check_syntax_error("'use strict'\nstatic")
+check_syntax_error("'use strict'\n\\u0073tatic")
+assert(eval("'use stric'\nstatic") === 8)
+assert(eval("'use stric'\n\\u0073tatic") === 8)