69 lines
3.6 KiB
HTML
69 lines
3.6 KiB
HTML
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<title>doc/book/techniques/checking-the-version</title>
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<p><span class="h1">Checking The Version</span>
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<br/><br/>
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RETRO releases add and change things. You can use the <span class="tt">Version</span>
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variable to determine the version in use and react accordingly.
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<br/><br/>
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<span class='codeblock'><span class="tt">```</span><br/><span class="tt"><span class='fetch'>@Version</span> <span class='num'>#201906</span> <span class='prim'>eq?</span> <span class='imm'>[</span> <span class='str'>'Needs_2019.6!</span> s:put nl bye <span class='imm'>]</span> <span class='prim'>if</span> </span><br/>
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<span class="tt">```</span></span><br/><br/>
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This can be also be used to conditionally load compatibility files:
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<br/><br/>
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<span class='codeblock'><span class="tt">```</span><br/><span class="tt"><span class='note'>(If_newer_than_2016.6,_load_aliases_for_renamed_words)</span> </span><br/>
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<span class="tt"><span class='fetch'>@Version</span> <span class='num'>#201906</span> <span class='prim'>gt?</span> <span class='imm'>[</span> <span class='str'>'Renamed_2019.6.forth</span> include <span class='imm'>]</span> <span class='prim'>if</span> </span><br/>
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<span class="tt">```</span></span><br/><br/>
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<span class="h2">Version Number Format</span>
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<br/><br/>
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The version is a six digit number encoding the year and month of
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the release. So:
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<br/><br/>
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<tt class='indentedcode'>201901 is 2019.1</tt>
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<tt class='indentedcode'>201906 is 2019.6</tt>
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<tt class='indentedcode'>201911 is 2019.11</tt>
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<br/><br/>
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A <span class="tt">#100 /mod</span> will suffice to split these if needed.
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