Last modified: 2010-02-06 15:01:19 UTC
The links [[w:Wikipedia|]] and [[w:Wikipedia|{{{showas|}}}]] are the same (showas is not given), but the result is that link 1 is a link and link 2 is showing as [[w:Wikipedia|]].
Changed subject line to clarify. The 'pipe trick' name expansion is a transformation performed at page save time and operates on input text, so won't apply to the results of a template expansion.
The pipe trick also doesn't work in this case: [[{{ns:project}}:my topic|]] However, this works: [[{{ns:project}}:my topic|my topic]]
The pre-save-transform step can't predict to what the templates or arguments will expand in the future, so there is no way to do a correct replacement. Suggesting WONTFIX
Fixed in r62069