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{{documentation subpage}}
This template {{tim|evd}} shows the call of a template or predefined template and its result, for documentation.<b>&#124;</b>

==Usage==
:{{Tlx|evd|left side|</tt>up to 3 additional parameters}}
:{{Tlx|evd|left side|</tt>up to 3 additional parameters|4=s=separator}}

:The default separator is "'''gives'''", use <tt>s==</tt> or similar to get "'''='''" etc. Please note that for [[Help:parser function|parser function]]s the first parameter belongs to the left side before the "'''|'''" vertical bar aka ''pipe''.

==Examples==
Examples without additional parameters:
#{{Tlx|evd|CURRENTDAY|3=s=is}} displays
#:{{evd|CURRENTDAY|s=is}}
#{{Tlx|evd|#expr:2*3}} displays
#:{{evd|#expr:2*3}}
#{{Tlx|evd|<nowiki>1=#expr:2+2=5</nowiki>}} displays
#:{{evd|1=#expr:2+2=5}}
#{{Tlx|evd|<nowiki>1=#expr:(2+2=4)</nowiki>|<nowiki>s==</nowiki>}} displays
#:{{evd|1=#expr:(2+2=4)|s==}}
#{{Tlx|evd|urlencode:!|3=s=&amp;#61;}} displays
#:{{evd|urlencode:!|s=&#61;}}
#{{Tlx|evd|uc:abc}} gives
#:{{evd|uc:abc}}
#{&#123;subst:evd|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>.

As always the expression (first parameter) cannot directly contain "'''|'''", "'''='''", plus other special cases related to square brackets / curly braces. In the case of this template "not directly" means "never" except from "'''='''" as shown above.

This template and {{lt|evdn}} can be used if the case of an expression in double braces which itself includes a pair of double braces (simple '''nested''' expressions). For the former, use named parameters 1n ('''N'''ested part of first parameter) and optionally 1a (part '''A'''fter that). For the latter, use "|" for the inner "<nowiki>{{</nowiki>" and, if there is code after it, also for "}}".

#{{Tlx|evd|#expr:24*|3=1n=CURRENTDAY}} gives {{evd|#expr:24*|1n=CURRENTDAY}}
#{{Tlx|evdn|#expr:24*|CURRENTDAY}} gives {{evdn|#expr:24*|CURRENTDAY}}
#{{Tlx|evd|#expr:24*|3=1n=CURRENTDAY|4=1a=-24}} gives {{evd|#expr:24*|1n=CURRENTDAY|1a=-24}}
#{{Tlx|evdn|#expr:24*|CURRENTDAY|-24}} gives {{evdn|#expr:24*|CURRENTDAY|-24}}
#{{Tlx|evdn|#expr:4*|#expr:not 0|<nowiki> &gt;3 | yields</nowiki>}} displays
#:{{evdn|#expr: 4*|#expr:not 0| >3 | yields}}
#{{Tlx|evdn|urlencode:|DIRMARK}} displays
#:{{evdn|urlencode:|DIRMARK}}

Examples with additional parameters (no nesting possible):

;Example&#58;
:{{Tlx|evd|#ifeq: 1.00|+1|okay}} gives:
:{{evd|#ifeq: 1.00|+1|okay}}
;Example&#58;
:{{Tlx|evd|#ifeq: this|that<tt><nowiki>||</nowiki></tt>false|4=s=is}} gives:
:{{evd|#ifeq: this|that||false|s=is}}
;Example&#58;
:{{Tlx|evd|#expr: 3*4}} gives:
:{{evd|#expr: 3*4}}
;Example&#58;
:{{Tlx|evaldemo|#expr: 3*4}} gives:
:{{evaldemo|#expr: 3*4}}

:{{evd|tc}}
:{{evd|t|b}}
:{{evd|t|b|c|s=yields}}
:{{evd|t2|b|c}}
:{{evd|t2|b|c|d}}
:{{evd|t2|b|c|d|s=yields}}

In the case of one or more named parameters, write all parameter definitions from that as value of the appropriate parameter number, e.g.:
:<nowiki>{{evd|t link|2=wikt=abc|3=}}</nowiki> gives "{{evd|t link|2=wikt=abc|3=}}"

Optional substitution with <tt>subst=subst:</tt> is '''not''' supported. It's anyway against the spirit of this demo template showing what another template actually '''does''', and not what it '''did''' some time ago.
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[[Category:Demo templates|evd]]
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