https://forge.codesys.com/forge/talk/Engineering/thread/051eabaac2/2020-02-27T14:13:41.103000ZRecent posts to OO: Extending FB_Init2020-02-27T14:13:41.103000Z2020-02-27T14:13:41.103000ZDavidWSteadmanhttps://forge.codesys.com/u/davidwsteadman/https://forge.codesys.com056a7f384af6a936c480056251c2a617f0de542d

<div class="markdown_content"><p>Thanks, I was afraid that might be the case. Pity, that is quite a restriction for working with class hierarchies. I can understand not supporting overloading for regular methods, but for constructors it strikes me as kind of a big deal.</p> <p>Maybe it will turn up in future versions...</p></div>

2020-02-27T14:13:40.743000Z2020-02-27T14:13:40.743000Zsingletonhttps://forge.codesys.com/u/singleton/https://forge.codesys.com27fbe3b300be98e1400ccab9102d8d2faad37bf2

<div class="markdown_content"><p>Hello,<br/> unfortunately CoDeSys does not support overloading.</p></div>

2020-02-27T14:13:40.372000Z2020-02-27T14:13:40.372000ZDavidWSteadmanhttps://forge.codesys.com/u/davidwsteadman/https://forge.codesys.com7c92a13dfe83804706252b7b68cf8d2295539adb

<div class="markdown_content"><p>I have a base class that I'd like to extend such that the subclass has extra parameters in its constructor.</p> <p>For the sake of brevity, I'll skip the class definitions and jump straight to the object declarations - I think it gets my point across:</p> <div class="codehilite"><pre><span></span><span class="n">A</span> <span class="o">:</span> <span class="n">BaseClass</span> <span class="o">(</span><span class="n">parameter</span> <span class="o">:=</span> <span class="n">myParameterValueForA</span><span class="o">);</span> <span class="n">B</span> <span class="o">:</span> <span class="n">BaseClass_Specialization_1</span> <span class="o">(</span><span class="n">parameter</span> <span class="o">:=</span> <span class="n">myParameterValueForB</span><span class="o">,</span> <span class="n">specializedParameter</span> <span class="o">:=</span> <span class="n">mySpecializedParameterForB</span><span class="o">);</span> </pre></div> <p>However, CODESYS doesn't like the definition of BaseClass_Specialization_1.FB_Init because it doesn't match BaseClass.FB_Init. This is a standard thing to do with other OO languages, and I'm trying to figure out if I'm just missing something or if it's not supported.</p> <p>Any thoughts / suggestions?</p></div>