First go project - String to number calculator

<p>I made my first go project. It&#39;s a string to number calculator. I would love to get some feedback on this. <a href="https://github.com/relnod/calcgo" rel="nofollow">https://github.com/relnod/calcgo</a></p> <hr/>**评论：**<br/><br/>Killing_Spark: <pre><p>Would be nice to have variables in there too. You cant evaluate these asts until the user provides an instantiation of the variable, but it would probably be useful if someone builds an app around your library. </p></pre>relnod: <pre><p>Variables are a great idea! I tried implemeting them here <a href="https://github.com/relnod/calcgo/pull/4" rel="nofollow">https://github.com/relnod/calcgo/pull/4</a>. Currently I can only have integer variables, because I&#39;m not sure, whats the best way to pass both integer and float variables to my interpreter. Currently I pass my variables to the Interpreter like this: <code>result, errors := calcgo.Interpret(&#34;a&#34;, map[string]int{&#34;a&#34;: 1, &#34;b&#34;: 2})</code></p> <p>The Interpret function now looks like this: <code>func Interpret(str string, variables ...map[string]int) (float64, []error) {</code></p> <p>Is there a good way to support both integers and floats like this?</p></pre>Killing_Spark: <pre><p>I dont know any unfortunatly. You could make the input floats and require the user to cast ints to floats but that is a bit ugly too :/</p></pre>