title: Finding tokens in string for given regular expression
body: <p>I have a string like </p>
  
  <pre><code>`hello@{name},how are you today, location: @{location}, time: @{time}`
  </code></pre>
  
  <p>I want to find all tokens start with "@{" and ends with "}". I.e. my out put will be the list of following tokens: @{name},@{location},@{time}. or just name,location,time.</p>