Editing Template:When pagename is/doc (section)

== Usage ==

This template takes one or more parameters. Most of the parameters don't have fixed names, instead they are part of the pattern matching. Like this:
<pre>
{{When pagename is
| /doc = Doc page text
| other = Other pages text
}}
</pre>

If the template is on "Template:Example/doc" the code above will return this:
: {{When pagename is
  | /doc = Doc page text
  | other = Other pages text
  | page = Template:Example/doc
 }}

If the template is on any ''other'' page than a /doc page it will return this:

: {{When pagename is
   | /doc = Doc page text
   | other = Other pages text
   | page = Template:Example
  }}

Here is a description of the full pattern matching:
<pre>
{{When pagename is
<!-- Match on full pagename -->
 | User:Example/test = Text for "User:Example/test".
 | User:Example = Text for "User:Example".
 | User talk:Example = Text for "User talk:Example".

<!-- Match on full basepage name, when on a basepage or its subpages -->
 | User:Example/+ = Matches "User:Example" and "User:Example/test".

<!-- Match on pagename, when on a basepage -->
 | Example = Matches "User:Example", "User talk:Example", "Template:Example" 
             and so on, but not "User:Example/something".

<!-- Match on full basepage name, when on a subpage -->
 | User:Example/* = Matches "User:Example/something", but not "User:Example".
 | User talk:Example/* = Matches "User talk:Example/something".

<!-- Match on basepage name, when on a subpage -->
 | Example/* = Matches "User:Example/something" and "User talk:Example/something".

<!-- Match on subpage name -->
 | /something = Any pagename that ends in "/something".
 | /doc = Any pagename that ends in "/doc".

<!-- Match on partial subpage name (case-insensitive) -->
 | /some* = Any subpage name beginning with "/some" or "/Some".
 | /arch* = Matches "User talk:Example/Archive 1".

<!-- Defaults -->
 | basepage = Text for any basepage.
 | subpage = Text for any subpage.
 | other = Text for any page.
}}
</pre>

The matching goes from top to bottom, and returns the first parameter that matches. "''Top to bottom''" means the order shown above, not the order you happen to feed the parameters.

There's no limit to the number of parameters that you can use, other than what the servers and MediaWiki system can handle. 

Most of the matching is case-sensitive. For instance "<code>/test</code>" matches "User:Example/test" but not "User:Example/Test". 

Matching on partial subpage names such as "<code>/some*</code>" has some limitations, see [[#Partial subpage names|its own section]] below.

If an empty (but defined) parameter matches, the matching stops and the template returns an empty string. That's on purpose and can be used like this:
<pre>
{{When pagename is
 | /doc =
 | /sandbox = Sandbox text
 | other = Other pages text
}}
</pre>

The code above will render nothing when on a /doc page. But when on a /sandbox page it will return this: 

: {{When pagename is
   | /doc =
   | /sandbox = Sandbox text
   | other = Other pages text
   | page = Template:Example/sandbox
  }}

And when on any other page it will return this:
: {{When pagename is
   | /doc =
   | /sandbox = Sandbox text
   | other = Other pages text
   | page = Template:Example
  }}