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Simplified the Constructor and Resolver example -

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no need for range checks as they are handled in Node itself.
This commit is contained in:
Ferdinand Majerech 2011-10-17 13:13:02 +02:00
parent 548480b06b
commit 009017eef0
10 changed files with 48 additions and 69 deletions
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18
doc/html/tutorials/custom_types.html
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@ -121,24 +121,18 @@ of these functions:</p>
<span class="n">Color</span> <span class="n">constructColorMapping</span><span class="p">(</span><span class="n">Mark</span> <span class="n">start</span><span class="p">,</span> <span class="n">Mark</span> <span class="n">end</span><span class="p">,</span> <span class="k">ref</span> <span class="n">Node</span> <span class="n">node</span><span class="p">)</span>
<span class="p">{</span>
<span class="kt">int</span> <span class="n">r</span><span class="p">,</span><span class="n">g</span><span class="p">,</span><span class="n">b</span><span class="p">;</span>
<span class="kt">bool</span> <span class="n">error</span> <span class="p">=</span> <span class="kc">false</span><span class="p">;</span>
<span class="kt">ubyte</span> <span class="n">r</span><span class="p">,</span><span class="n">g</span><span class="p">,</span><span class="n">b</span><span class="p">;</span>
<span class="c1">//Might throw if a value is missing or is not an integer.</span>
<span class="c1">//Might throw if a value is missing is not an integer, or is out of range.</span>
<span class="k">try</span>
<span class="p">{</span>
<span class="n">r</span> <span class="p">=</span> <span class="n">node</span><span class="p">[</span><span class="s">&quot;r&quot;</span><span class="p">].</span><span class="n">get</span><span class="p">!</span><span class="kt">int</span><span class="p">;</span>
<span class="n">g</span> <span class="p">=</span> <span class="n">node</span><span class="p">[</span><span class="s">&quot;g&quot;</span><span class="p">].</span><span class="n">get</span><span class="p">!</span><span class="kt">int</span><span class="p">;</span>
<span class="n">b</span> <span class="p">=</span> <span class="n">node</span><span class="p">[</span><span class="s">&quot;b&quot;</span><span class="p">].</span><span class="n">get</span><span class="p">!</span><span class="kt">int</span><span class="p">;</span>
<span class="n">r</span> <span class="p">=</span> <span class="n">node</span><span class="p">[</span><span class="s">&quot;r&quot;</span><span class="p">].</span><span class="n">get</span><span class="p">!</span><span class="kt">ubyte</span><span class="p">;</span>
<span class="n">g</span> <span class="p">=</span> <span class="n">node</span><span class="p">[</span><span class="s">&quot;g&quot;</span><span class="p">].</span><span class="n">get</span><span class="p">!</span><span class="kt">ubyte</span><span class="p">;</span>
<span class="n">b</span> <span class="p">=</span> <span class="n">node</span><span class="p">[</span><span class="s">&quot;b&quot;</span><span class="p">].</span><span class="n">get</span><span class="p">!</span><span class="kt">ubyte</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">catch</span><span class="p">(</span><span class="n">NodeException</span> <span class="n">e</span><span class="p">)</span>
<span class="p">{</span>
<span class="n">error</span> <span class="p">=</span> <span class="kc">true</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">if</span><span class="p">(</span><span class="n">error</span> <span class="p">||</span> <span class="n">r</span> <span class="p">&lt;</span> <span class="mi">0</span> <span class="p">||</span> <span class="n">r</span> <span class="p">&gt;</span> <span class="mi">255</span> <span class="p">||</span> <span class="n">g</span> <span class="p">&lt;</span> <span class="mi">0</span> <span class="p">||</span> <span class="n">g</span> <span class="p">&gt;</span> <span class="mi">255</span> <span class="p">||</span> <span class="n">b</span> <span class="p">&lt;</span> <span class="mi">0</span> <span class="p">||</span> <span class="n">b</span> <span class="p">&gt;</span> <span class="mi">255</span><span class="p">)</span>
<span class="p">{</span>
<span class="k">throw</span> <span class="k">new</span> <span class="n">ConstructorException</span><span class="p">(</span><span class="s">&quot;Invalid color&quot;</span><span class="p">,</span> <span class="n">start</span><span class="p">,</span> <span class="n">end</span><span class="p">);</span>
<span class="k">throw</span> <span class="k">new</span> <span class="n">ConstructorException</span><span class="p">(</span><span class="s">&quot;Invalid color: &quot;</span> <span class="p">~</span> <span class="n">e</span><span class="p">.</span><span class="n">msg</span><span class="p">,</span> <span class="n">start</span><span class="p">,</span> <span class="n">end</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">return</span> <span class="n">Color</span><span class="p">(</span><span class="k">cast</span><span class="p">(</span><span class="kt">ubyte</span><span class="p">)</span><span class="n">r</span><span class="p">,</span> <span class="k">cast</span><span class="p">(</span><span class="kt">ubyte</span><span class="p">)</span><span class="n">g</span><span class="p">,</span> <span class="k">cast</span><span class="p">(</span><span class="kt">ubyte</span><span class="p">)</span><span class="n">b</span><span class="p">);</span>