an>.Format.formatter <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-expr">expr</a> <span class="arrow">&#45;&gt;</span></span> unit</span></code></div><div class="spec-doc"><p><code>pp_expr fmt e</code> prints expression <code>e</code> on formatter <code>fmt</code>.</p></div></div><h4 id="l-values"><a href="#l-values" class="anchor"></a>L-Values</h4><div class="odoc-spec"><div class="spec type anchored" id="type-lval_desc"><a href="#type-lval_desc" class="anchor"></a><code><span><span clas