https://mywikibiz.com/index.php?action=history&feed=atom&title=Module%3ACallAssert%2Fdoc 2026-06-14T09:46:41Z Revision history for this page on the wiki MediaWiki 1.35.3 https://mywikibiz.com/index.php?title=Module:CallAssert/doc&diff=471169&oldid=prev 2021-07-15T20:53:33Z

<p>Pywikibot 6.4.0</p> <p><b>New page</b></p><div>{{Module rating|r}}<br /> {{used in system}}<br /> This [[Help:Lua metamodules|metamodule]] provides function '''callAssert''', which simplifies error checking by throwing an error if a given function returns nil or false. This is similar to the built-in function [[mw:LUAREF#assert|assert]], but unlike it, callAssert itself calls the function, whose return value is to be checked. This allows it to include the function name and argument values in the error message.<br /> <br /> == Usage ==<br /> <br /> local callAssert = require('Module:CallAssert')<br /> local result1, result2, etc = '''callAssert(''func'', {{'}}''funcName''{{'}}, ...)'''<br /> <br /> &lt;code&gt;callAssert&lt;/code&gt; calls &lt;code&gt;''func''(...)&lt;/code&gt; and checks if the first returned value evaluates to true. If it does, then it returns all the returned values. If not, it throws an error with a message in the form &lt;code&gt;{{'}}''funcName''(''argument_values'') failed'&lt;/code&gt;.<br /> &lt;includeonly&gt;{{#ifeq:{{SUBPAGENAME}}|sandbox | |<br /> [[Category:Error-handling modules]]<br /> }}&lt;/includeonly&gt;</div>

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