Brett Wuth: New page: {{Template doc|subst=subst:}} Based on http://meta.wikimedia.org/wiki/Template:If ==Usage== * 4 parameters: **`{{if||x| p | q }}` gives "{{if...

Brett Wuth — Mon, 31 Dec 2012 18:58:32 GMT

New page: {{Template doc|<nowiki>subst=subst:</nowiki>}} Based on http://meta.wikimedia.org/wiki/Template:If ==Usage== * 4 parameters: **<code><nowiki>{{if||x| p | q }}</nowiki></code> gives "{{if...

New page

{{Template doc|<nowiki>subst=subst:</nowiki>}}

Based on
http://meta.wikimedia.org/wiki/Template:If

==Usage==
* 4 parameters:
**<code><nowiki>{{if||x| p | q }}</nowiki></code> gives "{{if||x| p | q }}"
**<code><nowiki>{{if||| p | q }}</nowiki></code> gives "{{if||| p | q }}"
**<code><nowiki>{{if|expr|2<3| p | q }}</nowiki></code> gives "{{if|expr|2<3| p | q }}"
**<code><nowiki>{{if|expr|2>3| p | q }}</nowiki></code> gives "{{if|expr|2>3| p | q }}"
**<code><nowiki>{{if|expr|2{{=}}3| p | q }}</nowiki></code> gives "{{if|expr|2{{=}}3| p | q }}"
**<code><nowiki>{{if|expr||2=2=3| p | q }}</nowiki></code> gives "{{if|expr||2=2=3| p | q }}"
**<code><nowiki>{{if|exist| Template:If | p | q }}</nowiki></code> gives "{{if|exist| Template:If | p | q }}"
**<code><nowiki>{{if|exist| No Such:If | p | q }}</nowiki></code> gives "{{if|exist| No Such:If | p | q }}"
**<code><nowiki>{{if|error|x| p | q }}</nowiki></code> gives "{{if|error|x| p | q }}"
**<code><nowiki>{{if|error| 7 | p | q }}</nowiki></code> gives "{{if|error| 7 | p | q }}"
**<code><nowiki>{{if|error| 7 | p | }}</nowiki></code> gives "{{if|error| 7 | p | }}"
**<code><nowiki>{{if|error| 7 | p |}}</nowiki></code> gives "{{if|error| 7 | p |}}"
**<code><nowiki>{{if|error| 7 | p }}</nowiki></code> gives "{{if|error| 7 | p }}"
* 5 parameters:
**<code><nowiki>{{if|eq| u |u| p | q }}</nowiki></code> gives "{{if|eq| u |u| p | q }}"
**<code><nowiki>{{if|eq| u |v| p | q }}</nowiki></code> gives "{{if|eq| u |v| p | q }}"

Compare:
* 3 parameters:
**<code><nowiki>{{#if:x| p | q }}</nowiki></code> gives "{{#if:x| p | q }}"
**<code><nowiki>{{#ifexpr:2<3| p | q }}</nowiki></code> gives "{{#ifexpr:2<3| p | q }}"
**<code><nowiki>{{#ifexist: Help:Link | p | q }}</nowiki></code> gives "{{#ifexist: Help:Link | p | q }}"
**<code><nowiki>{{#iferror:x| p | q }}</nowiki></code> gives "{{#iferror:x| p | q }}"
**<code><nowiki>{{#iferror: 7 | p | q }}</nowiki></code> gives "{{#iferror: 7 | p | q }}"
**<code><nowiki>{{#iferror: 7 | p | }}</nowiki></code> gives "{{#iferror: 7 | p | }}"
**<code><nowiki>{{#iferror: 7 | p |}}</nowiki></code> gives "{{#iferror: 7 | p |}}"
**<code><nowiki>{{#iferror: 7 | p }}</nowiki></code> gives "{{#iferror: 7 | p }}"
* 4 parameters:
**<code><nowiki>{{#ifeq: u |u| p | q }}</nowiki></code> gives "{{#ifeq: u |u| p | q }}"

Note that, unlike parser functions, templates require writing equals signs in values of unnamed parameters as <code><nowiki>{{=}}</nowiki></code>

For full substitution, simply use {{cnw|subst:}} or {{cnw|safesubst:}}. If the condition contains a parser function, template, or variable, that should be substituted too. Optionally the "then" or "else" part can also be substituted.

Error messages (examples):

*<code><nowiki>{{if|expr|1234>e3|1|0}}</nowiki></code> gives {{if|expr|1234>e3|1|0}}
*<code><nowiki>{{#ifexpr:1234>e3|1|0}}</nowiki></code> gives {{#ifexpr:1234>e3|1|0}}

Template:If/Doc - Revision history

Brett Wuth: New page: {{Template doc|subst=subst:}} Based on http://meta.wikimedia.org/wiki/Template:If ==Usage== * 4 parameters: **{{if||x| p | q }} gives "{{if...

Brett Wuth: New page: {{Template doc|subst=subst:}} Based on http://meta.wikimedia.org/wiki/Template:If ==Usage== * 4 parameters: **`{{if||x| p | q }}` gives "{{if...