// We must not use the http.Header().Set method here because some (broken)
	// clients expect the x-amz-copy-source-version-id header key to be literally
	// "x-amz-copy-source-version-id"- not in canonicalized form, preserve it.
	if srcOpts.VersionID != "" {
		w.Header()[strings.ToLower(xhttp.AmzCopySourceVersionID)] = []string{srcOpts.VersionID}
	}

	// Write success response.

	var n *routingNode
	host := r.URL.Host
	escapedPath := r.URL.EscapedPath()
	path := escapedPath
	// CONNECT requests are not canonicalized.
	if r.Method == "CONNECT" {
		// If r.URL.Path is /tree and its handler is not registered,
		// the /tree -> /tree/ redirect applies to CONNECT requests
		// but the path canonicalization does not.

	// Otherwise it is the usual import path.
	// For vendored imports, it is the expanded form.
	//
	// Note that when modules are enabled, local import paths are normally
	// canonicalized by modload.LoadPackages before now. However, if there's an
	// error resolving a local path, it will be returned untransformed
	// so that 'go list -e' reports something useful.
	importKey := importSpec{

      Block* body = getBody(1);
      return getResults().empty() ? OpBuilder::atBlockTerminator(body, listener)
                               : OpBuilder::atBlockEnd(body, listener);
    }
  }];

  // Canonicalizer wasn't defined for this one. In practise, we legalize the
  // tf.IfOp to scf.If op first and then legalize it to tfl.if to reduce
  // code redundancy.
}

def TFL_WhileOp : Op<TFL_Dialect, "while", [

language.
</p>

<h2 id="Source_code_representation">Source code representation</h2>

<p>
Source code is Unicode text encoded in
<a href="https://en.wikipedia.org/wiki/UTF-8">UTF-8</a>. The text is not
canonicalized, so a single accented code point is distinct from the
same character constructed from combining an accent and a letter;
those are treated as two code points.  For simplicity, this document