span class="op">&gt;&gt;</span>
        <span class="ident">ty</span>: <span class="macro">syn</span><span class="macro">!</span>(<span class="ident">Type</span>) <span class="op">&gt;&gt;</span>
        <span class="ident">eq_token</span>: <span class="macro">punct</span><span class="macro">!</span>(<span class="op">=</span>) <span class="op">&gt;&gt;</span>
        <span class="ident">expr</span>: <span class="macro">syn</span><span class="macro">!</span>(<span class="ident">Expr</span>) <span class="op">