Use a MediaWiki template argument both parsed and unparsed

Question

Suppose I have a simple template Foo

The wikitext

 {{{1}}}

renders as

<blockquote>{{{2}}}</blockquote>

So including {{Foo|<nowiki>'''bold''' and ''italics''</nowiki>|'''bold''' and ''italics''}} in a page renders as

The wikitext

'''bold''' and ''italics''

renders as

bold and italics

Is there any way to reduce the duplication required to use template Foo? That is, either modify Foo or call it via another template in such a way that the user only needs to specify the desired wikitext once, instead of two times?

I don't really care if it would be as

{{DRYFoo|<nowiki>'''bold''' and ''italics''</nowiki>}}

or

{{FooDRY|'''bold''' and ''italics''}}

and I'd be satisfied by something that used subst: to expand something else into a normal call to Foo.

The rules for order of evaluation would seem to rule out FooDRY, and I've been unable to find a template/parser function that would re-expand wikitext to make DRYFoo work.

Answer 1

The wikitext

 {{{1}}}

renders as

<blockquote>{{#tag:nowiki|{{{2}}}}}</blockquote>

should do the job ({{#tag}} turns XML-style tags into normal parserfuncions, ie. flips the evaluation order).