n>'s operations do not throw.</p>
<p>The referenced object remains valid at least as long as there is an <span class="RenoLink">exception_ptr</span> object that refers to it.</p>
<p>Two instances of <span class="RenoLink">exception_ptr</span> are equivalent and compare equal if and only if they refer to the same exception.</p>
<p>The default constructor of <span class="RenoLink">exception_ptr</span> produces the null value of the type. The null value is equivalent only to itself.</p>
<h4>Thread safety:</h4>