:[{since:"0001-01-01",until:1/0,offset:1,name:"Anno Domini",narrow:"AD",abbr:"AD"},{since:"0000-12-31",until:-1/0,offset:1,name:"Before Christ",narrow:"BC",abbr:"BC"}],dayOfMonthOrdinalParse:/\d{1,2}(th|st|nd|rd)/,ordinal:function(e){var a=e%10;return e+(1===G(e%100/10)?"th":1==a?"st":2==a?"nd":3==a?"rd":"th")}}),M.lang=t("moment.lang is deprecated. Use moment.locale instead.",oa),M.langData=t("moment.langData is deprecated. Use moment.localeData instead.",ua);var gt=Math.abs;function wt(e,a,t,s){var...

Section 4.5 "General Category" defines a set of character categories.
Go treats all characters in any of the Letter categories Lu, Ll, Lt, Lm, or Lo
as Unicode letters, and those in the Number category Nd as Unicode digits.
</p>

<h3 id="Letters_and_digits">Letters and digits</h3>

<p>
The underscore character <code>_</code> (U+005F) is considered a lowercase letter.
</p>
<pre class="ebnf">