s.error_handling.h1"></a>
        <span class="phrase"><a name="spirit_x3.tutorials.error_handling.expectations"></a></span><a class="link" href="error_handling.html#spirit_x3.tutorials.error_handling.expectations">Expectations</a>
      </h5>
<p>
        There are occasions in which it is expected that the input must match a particular
        parser or the input is invalid. Such cases generally arise after matching
        a portion of a grammar, such that the context is fully known. In such a situation,
