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Declare Active Conventions inside C# or VB.NET Source Code
travislaborde
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6-26-2008 7:43 AM
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travislaborde
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/4c718905-f869-4b7d-a486-6165eba37964/AD60D22A-D2AB-4DF2-A70C-2FA7AA1DB88C/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx" href="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx" style="font-size: 11px;">codebetter.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx"><H4 class="BlogPostHeader">Declare Active Conventions inside C# or VB.NET Source Code </H4></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx"><P>With the last version of <A target="_blank" href="http://www.NDepend.com">NDepend</A>, we polished one particular scenario that I would like to describe properly: The possibility to store <A target="_blank" href="http://www.ndepend.com/Features.aspx#CQL">CQL</A> rules inside source code.<BR /></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx">Consider this piece of code:</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/codebetter.com/img/FB166EC3-716D-49F8-BBA6-25A6960A2720" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx">let's write a custom convention that checks that:</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx"> When a method is calling the method <I>Foo1()</I>, it <B>must </B>also call the method <I>Foo2(int)</I>.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/codebetter.com/img/3B492E1E-B9B8-4088-9D11-3847359BF734" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx">Right click the editor and select: <I>Copy to clipboard to insert this query in C# source code</I> ...</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/codebetter.com/img/1B27049B-44AB-4B20-8097-C5A242B0DDF4" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx">... and paste the clipboard content just before the <I>Fct1()</I> method definition. An attribute is now tagging the <I>Fct1() </I>method definition.</blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/codebetter.com/img/9900789D-2CB3-4808-BFBE-459284007557" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://codebetter.com/blogs/patricksmacchia/archive/2008/06/25/declare-active-conventions-inside-c-or-vb-net-source-code.aspx">It makes sense to declare such constraint near the <I>Foo1() / Foo2(int)</I> methods definitions. This way, during code review or refactoring developers cannot miss it. This is active documentation. </blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/AD60D22A-D2AB-4DF2-A70C-2FA7AA1DB88C/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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