https://sourceforge.net/p/clipsrules/feature-requests/8/Recent changes to 8: Add primitive type NULLenSun, 19 Jan 2025 21:52:07 -0000https://sourceforge.net/p/clipsrules/feature-requests/8/<div class="markdown_content"><div class="codehilite"><pre><span></span><code><span class="w"> </span><span class="nx">I</span><span class="w"> </span><span class="nx">am</span><span class="w"> </span><span class="nx">requesting</span><span class="w"> </span><span class="nx">that</span><span class="w"> </span><span class="nx">CLIPS</span><span class="w"> </span><span class="nx">be</span><span class="w"> </span><span class="nx">enhanced</span><span class="w"> </span><span class="nx">to</span><span class="w"> </span><span class="nx">include</span><span class="w"> </span><span class="nx">the</span><span class="w"> </span><span class="nx">NULL</span><span class="w"> </span><span class="k">type</span><span class="p">,</span><span class="w"> </span><span class="nx">which</span><span class="w"> </span><span class="nx">includes</span><span class="w"> </span><span class="nx">only</span><span class="w"> </span><span class="nx">instances</span><span class="w"> </span><span class="nx">of</span><span class="w"> </span><span class="nx">the</span><span class="w"> </span><span class="nx">nil</span><span class="w"> </span><span class="nx">value</span><span class="p">.</span><span class="w"> </span><span class="nx">This</span><span class="w"> </span><span class="k">type</span><span class="w"> </span><span class="nx">can</span><span class="w"> </span><span class="nx">be</span><span class="w"> </span><span class="nx">used</span><span class="w"> </span><span class="nx">to</span><span class="w"> </span><span class="nx">annotate</span><span class="w"> </span><span class="nx">slots</span><span class="p">.</span><span class="w"> </span><span class="nx">A</span><span class="w"> </span><span class="nx">slot</span><span class="w"> </span><span class="nx">could</span><span class="w"> </span><span class="k">then</span><span class="w"> </span><span class="nx">have</span><span class="w"> </span><span class="nx">the</span><span class="w"> </span><span class="p">(</span><span class="k">type</span><span class="w"> </span><span class="nx">NUMBER</span><span class="w"> </span><span class="nx">NULL</span><span class="p">),</span><span class="w"> </span><span class="nx">which</span><span class="w"> </span><span class="nx">would</span><span class="w"> </span><span class="nx">allow</span><span class="w"> </span><span class="nx">the</span><span class="w"> </span><span class="nx">slot</span><span class="w"> </span><span class="nx">to</span><span class="w"> </span><span class="nx">include</span><span class="w"> </span><span class="nx">both</span><span class="w"> </span><span class="nx">numbers</span><span class="w"> </span><span class="k">and</span><span class="w"> </span><span class="nx">the</span><span class="w"> </span><span class="nx">nil</span><span class="w"> </span><span class="nx">value</span><span class="p">.</span><span class="w"> </span><span class="p">(</span><span class="k">default</span><span class="w"> </span><span class="nx">nil</span><span class="p">)</span><span class="w"> </span><span class="nx">would</span><span class="w"> </span><span class="k">then</span><span class="w"> </span><span class="nx">be</span><span class="w"> </span><span class="nx">possible</span><span class="p">.</span><span class="w"> </span><span class="nx">In</span><span class="w"> </span><span class="nx">this</span><span class="w"> </span><span class="nx">way</span><span class="p">,</span><span class="w"> </span><span class="nx">the</span><span class="w"> </span><span class="nx">slot</span><span class="w"> </span><span class="nx">could</span><span class="w"> </span><span class="nx">include</span><span class="w"> </span><span class="nx">numbers</span><span class="w"> </span><span class="nx">when</span><span class="w"> </span><span class="nx">the</span><span class="w"> </span><span class="nx">slot</span><span class="w"> </span><span class="nx">has</span><span class="w"> </span><span class="nx">been</span><span class="w"> </span><span class="nx">initialized</span><span class="w"> </span><span class="k">and</span><span class="w"> </span><span class="nx">nil</span><span class="w"> </span><span class="nx">before</span><span class="w"> </span><span class="nx">it</span><span class="w"> </span><span class="nx">has</span><span class="w"> </span><span class="nx">been</span><span class="w"> </span><span class="nx">initialized</span><span class="p">.</span><span class="w"> </span><span class="nx">My</span><span class="w"> </span><span class="nx">expert</span><span class="w"> </span><span class="nx">system</span><span class="w"> </span><span class="nx">designs</span><span class="w"> </span><span class="nx">electronic</span><span class="w"> </span><span class="nx">circuits</span><span class="p">.</span><span class="w"> </span><span class="nx">I</span><span class="w"> </span><span class="nx">would</span><span class="w"> </span><span class="k">like</span><span class="w"> </span><span class="nx">to</span><span class="w"> </span><span class="nx">differentiate</span><span class="w"> </span><span class="nx">between</span><span class="w"> </span><span class="nx">uninitialized</span><span class="w"> </span><span class="nx">slots</span><span class="w"> </span><span class="k">and</span><span class="w"> </span><span class="nx">those</span><span class="w"> </span><span class="nx">that</span><span class="w"> </span><span class="nx">have</span><span class="w"> </span><span class="nx">been</span><span class="w"> </span><span class="nx">populated</span><span class="p">.</span><span class="w"> </span><span class="nx">I</span><span class="w"> </span><span class="nx">can</span><span class="w"> </span><span class="nx">specify</span><span class="w"> </span><span class="p">(</span><span class="k">type</span><span class="w"> </span><span class="nx">NUMBER</span><span class="w"> </span><span class="nx">SYMBOL</span><span class="p">),</span><span class="w"> </span><span class="nx">which</span><span class="w"> </span><span class="nx">I</span><span class="w"> </span><span class="nx">won</span><span class="err">'</span><span class="nx">t</span><span class="p">.</span><span class="w"> </span><span class="nx">It</span><span class="err">'</span><span class="nx">s</span><span class="w"> </span><span class="nx">unhygeneic</span><span class="p">.</span><span class="w"> </span><span class="nx">I</span><span class="w"> </span><span class="nx">just</span><span class="w"> </span><span class="nx">don</span><span class="err">'</span><span class="nx">t</span><span class="w"> </span><span class="nx">use</span><span class="w"> </span><span class="nx">a</span><span class="w"> </span><span class="k">type</span><span class="w"> </span><span class="nx">facet</span><span class="p">.</span> </code></pre></div> </div>Dave RichardsSun, 19 Jan 2025 21:52:07 -0000https://sourceforge.net955367da225ce15bc1648788c1216dee20431080