Go: Deconstructing Type Parameters

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<h1 class="small"><a href="/blog/">The Go Blog</a></h1>


<h1>Deconstructing Type Parameters</h1>
  
  <p class="author">
  Ian Lance Taylor<br>
  26 September 2023
  </p>
  
  <h2 id="slices-package-function-signatures">slices package function signatures</h2>

The slices.Clone function is pretty simple: it makes a copy of a slice of any type.

func Clone[S ~[]E, E any](s S) S {
    return append(s[:0:0], s...)
}

This works because appending to a slice with zero capacity will allocate a new backing array. The function body winds up being shorter than the function signature, which is in part because the body is short, but also because the signature is long. In this bl...

Get the full details here: Deconstructing Type Parameters - The Go Programming Language