(Notice the pair of vertical bars surrounding the empty first parameter) |
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==Usage== | ==Usage== | ||
*<nowiki>{{if||x| p | q }}</nowiki> gives "{{if||x| p | q }}" | *<nowiki>{{if||x| p | q }}</nowiki> gives "{{if||x| p | q }}". Notice the ''pair'' of vertical bars surrounding the empty first parameter. | ||
*<nowiki>{{if|expr|2<3| p | q }}</nowiki> gives " p " | *<nowiki>{{if|expr|2<3| p | q }}</nowiki> gives " p " | ||
*<nowiki>{{if|eq| u |u| p | q }}</nowiki> gives "{{if|eq| u |u| p | q }}" | *<nowiki>{{if|eq| u |u| p | q }}</nowiki> gives "{{if|eq| u |u| p | q }}" | ||
Revision as of 07:10, 7 July 2011
{{#invoke:Message box|mbox}}
With this template the parser functions of the ParserFunctions collection with names starting with "#if" can be used in a way such that they do not strip spaces and newlines from the "then" and "else" part. Spaces still do not affect the outcome of the condition.
Usage
- {{if||x| p | q }} gives " p ". Notice the pair of vertical bars surrounding the empty first parameter.
- {{if|expr|2<3| p | q }} gives " p "
- {{if|eq| u |u| p | q }} gives " p "
- {{if|exist| Help:Link | p | q }} gives " q "
- {{if|error|{{#expr:x}}| p | q }} gives " p "
Compare:
- {{#if:x| p | q }} gives "p"
- {{#ifexpr:2<3| p | q }} gives "p"
- {{#ifeq: u |u| p | q }} gives "p"
- {{#ifexist: Help:Link | p | q }} gives "q"
- {{#iferror:{{#expr:x}}| p | q }} gives "p"
For full substitution, use e.g. {{subst:if|expr|2<3| p | q |subst=subst:}}. If the condition contains a parser function or template etc., that should be substituted too. Optionally the "then" or "else" part can also be substituted.
See also