查看“模板:If pagename”的源代码

{{#if:x   <!--Remove surrounding whitespace-->
| <!--Check for match with full pagename-->
  {{{ {{#if:{{{page|}}}| {{{page|}}} | {{FULLPAGENAME}} }}   <!--Has data, or is empty but defined-->
  | <!--Check for match with "User:Somepage/+"-->
    {{{ {{#titleparts:{{#if:{{{page|}}}| {{{page|}}} | {{FULLPAGENAME}} }}|1|1}}/+
    | <!--Else, are we on a subpage or a basepage?-->
      {{#if:{{#titleparts:{{#if:{{{page|}}}| {{{page|}}} | {{FULLPAGENAME}} }}|0|2}}
      | <!--We are on a subpage, check for match with "User:Somepage/*"-->
        {{{ {{#titleparts:{{#if:{{{page|}}}| {{{page|}}} | {{FULLPAGENAME}} }}|1|1}}/*
        | <!--Check for match with "Somepage/*"-->
          {{{ {{#titleparts:{{#if:{{{page|}}}| {{PAGENAME:{{{page|}}}}} | {{PAGENAME}} }}|1|1}}/*
          | <!--Check for match with "/something"-->
            {{{ /{{#titleparts:{{#if:{{{page|}}}| {{{page|}}} | {{FULLPAGENAME}} }}|0|-1}}
            | <!--Check for match with "/somethin*"-->
              {{{ /{{lc: {{padleft:|8| {{#titleparts:{{#if:{{{page|}}}| {{{page|}}} | {{FULLPAGENAME}} }}|0|-1}}# }} }}*
              | <!--Check for match with "/someth*"-->
                {{{ /{{lc: {{padleft:|6| {{#titleparts:{{#if:{{{page|}}}| {{{page|}}} | {{FULLPAGENAME}} }}|0|-1}}# }} }}*
                | <!--Check for match with "/some*"-->
                  {{{ /{{lc: {{padleft:|4| {{#titleparts:{{#if:{{{page|}}}| {{{page|}}} | {{FULLPAGENAME}} }}|0|-1}}# }} }}*   <!--Pad with # so "/a" doesn't match "/aaaa*"-->
                  | {{{subpage| {{{other|}}} }}}   <!--Respecting empty parameter on purpose-->
                  }}}
                }}}
              }}}
            }}}
          }}}
        }}}
      | <!--We are on a basepage, check for match with "Somepage"-->
        {{{ {{#if:{{{page|}}}| {{PAGENAME:{{{page|}}}}} | {{PAGENAME}} }}
        | {{{basepage| {{{other|}}} }}}   <!--Respecting empty parameter on purpose-->
        }}}
      }}   <!--End if, are we on a subpage or a basepage?-->
    }}}
  }}}
}}