<p>Go allows to use unicode characters for function names. This is great because I can for instance create a function named héhé or with cyrilic or (I suppose) chinese characters. But we can't use a name composed of emoticons. </p>
<p>What are the unicodes characters that can be used ? </p>
<p>The Go language specification doesn't say much about the accepted characters (<a href="https://golang.org/ref/spec#Identifiers" rel="nofollow">https://golang.org/ref/spec#Identifiers</a>)</p>
<hr/>**评论：**<br/><br/>nhooyr: <pre><p>The spec says unicode letters.</p>
<p><a href="https://golang.org/pkg/unicode/#IsLetter" rel="nofollow">https://golang.org/pkg/unicode/#IsLetter</a> says that is category L.</p>
<p>So on this list <a href="https://www.compart.com/en/unicode/category" rel="nofollow">https://www.compart.com/en/unicode/category</a> any of the categories starting with L are allowed.</p></pre>dabshores: <pre><p>This is the correct answer for anyone wondering.</p></pre>ChristophBerger: <pre><p>One further restriction: The first letter of an identifier must exist in uppercase and lowercase variants, to be able to determine visibility.</p></pre>TheMerovius: <pre><p><a href="https://play.golang.org/p/pHvnpZUtpc" rel="nofollow">No, it doesn't</a>. The spec says, that an <a href="https://golang.org/ref/spec#Exported_identifiers" rel="nofollow">identifier is exported</a>, if it's first letter is uppercase. If the first letter doesn't have an upper case variant it is, by definition, not upper case and thus not exported.</p></pre>ChristophBerger: <pre><p>Good catch, thanks, This shall teach me to revisit the specs before hitting reply. :)
(edit: wording)</p></pre>
