an class="hljs-string">')'</span>
    expect(nextToken()).toBe <span class="hljs-literal">null</span>

  check <span class="hljs-string">"ok: exclamation mark before names"</span>, <span class="hljs-function">-&gt;</span>

    nextToken = tokenizer (result = <span class="hljs-keyword">new</span> Result), expr =  <span class="hljs-string">'a+!a,!#test'</span>

    expect(nextToken()).toBe <span class="hljs-string">'a'</span>
    expect(nextToken()).toBe <span class="hljs-string">'+'</span>
    expect(n