ull</span>

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

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

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