sexp_grammar"><a href="#val-t_sexp_grammar" class="anchor"></a><code><span class="keyword">val</span> t_sexp_grammar : Base__.Ppx_sexp_conv_lib.Sexp.Private.Raw_grammar.t</code></dt><dt class="spec value" id="val-mem"><a href="#val-mem" class="anchor"></a><code><span class="keyword">val</span> mem : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span class="type-var">'a</span> <span>&#45;&gt;</span> <span>equal:<span>(<span class="type-var">'a</span> 