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The '''#macro''' [[Help:parser function|parser function]] is intended for use in [[Help:template|templates]] in which template variables must be expanded before XML-style [[Help:tags|tags]] are processed.

==Syntax==
<nowiki>{{#macro:TAGNAME|TEXT}}</nowiki>
: or
<nowiki>{{#macro:TAGNAME|ASSIGNMENTS|TEXT}}</nowiki>

The effect is as though <TAGNAME ASSIGNMENTS>TEXT</TAGNAME> had been specified after any template variables in TAGNAME and ASSIGNMENTS had been expanded.

==Example==

On {{qed}}, &lt;image> is defined as an XML-style tag (see [[QED:image]]). If template variables were expanded before such tags, we would be able to write expressions such as:

 <nowiki><image src={{{1}}} width={{{width|{{{3|450}}}}}}>{{{2|}}}</image></nowiki>

To achieve the intended effect, we would instead write:

 <nowiki>{{#macro:image|src={{{1}}}
 width={{{width|{{{3|450}}}}}}
 | {{{2|}}} }}
</nowiki>

This is in fact how [[Template:Transclude]] is defined.

==Notes==
Prior to MediaWiki version 1.12, template variables were processed before XML-style extensions.

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