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This {{tim|xpd}} (expansion demo) shows the call of a variable, parser function or template and its result, for documentation.
==Stosowanie==
:{{Tlx|xpd|left side|up to 3 additional parameters}}

Please note that for [[m:Help:Parser function|parser functions]] the first parameter belongs to the left side before "|".

== Przykłady ==
bez dodatkowych parametrów:
{| class="wikitable"
|{{Tlx|xpd|jakis_szablon}} || {{xpd|jakis_szablon}}
|-
|{{Tlx|xpd|CURRENTDAY}} || {{xpd|CURRENTDAY}}
|-
|{{Tlx|xpd|#expr:2*3}} || {{xpd|#expr:2*3}}
|-
|{{Tlx|xpd|<nowiki>1=#expr:2+2=5</nowiki>}} || {{xpd|1=#expr:2+2=5}}
|-
|{{Tlx|xpd|<nowiki>1=#expr:2+2=4</nowiki>}} || {{xpd|1=#expr:2+2=4}}
|-
|{{Tlx|xpd|urlencode:!}} || {{xpd|urlencode:!}}
|-
|{{Tlx|xpd|uc:abc}} || {{xpd|uc:abc}}
|}

{&#123;subst:xpd|uc:Upper Case|subst=subst:&#125;} substitutes {&#123;<small>&#160;</small><code>subst:uc:Upper Case</code>&#125;} {{{2|gives}}} UPPER CASE

See [[Help:Substitution|Help:Substitution]] for several caveats wrt <tt>subst=subst:</tt>.

Note that, as always, a parameter containing "=" has to be explicitly named by putting, in this case, "1=" in front.

{{tim|xpdn}} can be used in the case of an expression in double braces which itself includes a pair of double braces (simple '''nested''' expressions). Use "|" for the inner "<nowiki>{{</nowiki>" and, if there is code after it, also for "}}".

{| class="wikitable"
|{{tlx|xpdn|#expr:24*|CURRENTDAY}} || {{xpdn|#expr:24*|CURRENTDAY}}
|-
|{{tlx|xpdn|#expr:24*|CURRENTDAY|-24}} || {{xpdn|#expr:24*|CURRENTDAY|-24}}
|-
|{{tlx|xpdn|#expr:4*|#expr:not 0|<nowiki> &gt;3</nowiki>}} || {{xpdn|#expr: 4*|#expr:not 0| >3}}
|-
|{{tlx|xpdn|urlencode:|DIRMARK}} || {{xpdn|urlencode:|DIRMARK}}
|}

Przykłady z dodatkowymi parametrami (bez możliwości zagnieżdżania):

{| class="wikitable"
|{{tlx|xpd|#ifeq: 1.00|+1|okay}} || {{xpd|#ifeq: 1.00|+1|okay}}
|-
|{{tlx|xpd|#ifeq: this|that<tt><nowiki>||</nowiki></tt>false|4=s=is}} || {{xpd|#ifeq: this|that||false|s=is}}
|-
|{{tlx|xpd|t|b}} || {{xpd|t|b}}
|-
|{{tlx|xpd|t2|b|c}} || {{xpd|t2|b|c}}
|}

In the case of one or more named parameters, write all parameter definitions from that as value of the appropriate parameter number, e.g. to pass 'wikt=abc' as 2nd argument assign it to '2=' using:
:<nowiki>{{xpd|t link|2=wikt=abc|3=}}</nowiki> gives "{{xpd|t link|2=wikt=abc|3=}}"

Optional substitution with <tt>subst=subst:</tt> is '''not''' supported. The xpd templates show what another template actually '''does''', and not what it '''did''' some time ago.

==Separator parameter==
The default ''separator'' of template code and its result is "gives", use <tt>s==</tt> or similar to get "=" etc.
;Usage&#58;
:{{tlx|xpd|left side|up to 3 additional parameters|4=s=separator}}
:{{tlx|xpdn|left side|nested part and optional last part|4=s=separator}}

Przykłady z parametrem separatora:

{| class="wikitable"
|{{Tlx|xpd|CURRENTDAY|3=s=is}} || {{xpd|CURRENTDAY|s=is}}
|-
|{{Tlx|xpd|<nowiki>1=#expr:2+2</nowiki>|<nowiki>s==</nowiki>}} || {{xpd|1=#expr:2+2|s==}}
|-
|{{Tlx|xpdn|#expr:4*|#expr:not 0|<nowiki> &gt;3 | yields</nowiki>}} || {{xpdn|#expr: 4*|#expr:not 0| >3 | yields}}
|}
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