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    <p><a href="https://github.com/milessabin/shapeless" rel="noreferrer">Shapeless</a> requires dependent method types (<code>-Ydependent-method-types</code>) and I wish there was a downloadable binary for 2.9.1 so that I can simply try it out but it's really seems elegant. Based on <a href="https://github.com/milessabin/shapeless/blob/master/src/test/scala/shapeless/conversions.scala" rel="noreferrer">this unit test</a> it would apply to your case like this:</p> <pre><code>import shapeless.Tuples._ import shapeless.HList._ val t7 = (t1.hlisted ::: t2.hlisted ::: t3.hlisted).tupled </code></pre> <p>Although Miles indicates there is not guarantee of support, it actually has unit tests and the source is on github with an open source license so at least it's not just an experiment in a blog post.</p> <p>Edit: works as advertized - took some time to compile and I had to add <code>-Xss1m</code> to sbt:</p> <pre><code>$ scala -Ydependent-method-types -cp target/scala-2.9.1/shapeless_2.9.1-1.1.0.jar Welcome to Scala version 2.9.1.final (Java HotSpot(TM) Client VM, Java 1.7.0). Type in expressions to have them evaluated. Type :help for more information. scala&gt; import shapeless.Tuples._ import shapeless.Tuples._ scala&gt; import shapeless.HList._ import shapeless.HList._ scala&gt; val t1 = Tuple2("abcd", "efg") t1: (java.lang.String, java.lang.String) = (abcd,efg) scala&gt; val t2 = Tuple2(1234, "lmnop") t2: (Int, java.lang.String) = (1234,lmnop) scala&gt; val t3 = Tuple3("qrs", "tuv", "wxyz") t3: (java.lang.String, java.lang.String, java.lang.String) = (qrs,tuv,wxyz) scala&gt; (t1.hlisted ::: t2.hlisted ::: t3.hlisted).tupled res0: (java.lang.String, java.lang.String, Int, java.lang.String, java.lang.String, java.lang.String, java.lang.String) = (abcd,efg,1234,lmnop,qrs,tuv,wxyz) </code></pre>
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    1. COAt some point I'll probably pimp the `HList`-style operations directly onto tuples, so you'll be able to skip the hlisted/tupled shuffle and just write `t1 ::: t2 ::: t3`. I've taken a pass at that on the [topic/tuples branch](https://github.com/milessabin/shapeless/tree/topic/tuples), but before I commit to it I want to be sure that the additional implicits don't cause havoc.
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    2. COYeah, this is exactly what I was looking for. Thanks huynhjl for pointing it out and the legwork to demonstrate that it satisfies the question, and thanks Miles for writing such a cool package!
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