Get string representation of function signature

Main.hx

import haxe.macro.Context;
import haxe.macro.Expr;
import haxe.macro.Type;

using haxe.macro.Tools;


class Main
{

    static public function main () : Void
    {
        var fn:Int->Int->Void;
        var stringType : String = FunctionTypeMacro.resolveType(fn);

        trace(stringType);
    }

}


class FunctionTypeMacro
{

    macro static public function resolveType (e:Expr) : ExprOf<String>
    {
        var typedExpr = Context.typeExpr(e);

        switch (typedExpr.t) {
            case TFun(args,result):
                var resolved = args.map(function(a) return a.t.toString()).join('->');
                resolved += '->' + result.toString();

                return macro $v{resolved};

            case _: throw 'Unsupported type';
        }
    }

}