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POHow to get name of argument in Clojure?
 

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  1. POHow to get name of argument in Clojure?
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    <p>I would like to get the name of a var defined outside a function, from within a function. The name should be the name that I used at the scope of the original definition, not any nested bindings where I'm actually trying to use the name.</p> <p>So I would like to do something like (academic example):</p> <pre><code>(defn f1 [x1] (println "hello, you passed var name &gt;&gt;" (get-var-name x1) "&lt;&lt;") (defn f2 [x2] (f1 x2)) (defn f3 [x3] (let [zzz x3] (f2 zzz)) (def my-var 3.1414926) (f3 my-var) user&gt; hello, you passed var name &gt;&gt;my-var&lt;&lt; </code></pre> <p>I'm able to do this macro based on some stuff i found:</p> <pre><code>(defmacro get-var-name [x] `(:name (meta (var ~x)))) </code></pre> <p>This works when called eg from the REPL, but compiler chokes when called from an "inside" scope eg</p> <pre><code>(defn another-func [y] (get-var-name y)) </code></pre> <p>Compiler says "saying Unable to resolve var y". <code>(macroexpand...)</code> shows it's trying to find local variable y in the current namespace, rather than the original variable in the current namespace. I think <code>(var...</code>) looks for namespace vars only, so this prevents the macro from working either within a function or another binding such as <code>let</code>.</p> <p>I <em>think</em> I'm stuck having to manually get the variable name from the same scope where I define the variable and pass it along as an extra parameter. Is there a more elegant way to pass var name information through a chain of bindings to the point where it's used? That would be bad-ass.</p> <p>thanks</p>
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