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    <p>A coworker and I found these two gems in some of our code for object streaming. These macros were instantiated in <strong><em>EVERY SINGLE</em></strong> class file that did streaming. Not only is this hideous code spewed all over our code base, when we approached the original author about it, he wrote a 7 page article on our internal wiki defending this as the only possible way to accomplish what he was attempting to do here. </p> <p>Needless to say, it has since been refactored out and is no longer used in our code base.</p> <p><strong>Don't be thrown off by the highlighted keywords. This is ALL a macro</strong></p> <pre><code>#define DECLARE_MODIFICATION_REQUEST_PACKET( T ) \ namespace NameSpace \ { \ \ class T##ElementModificationRequestPacket; \ } \ \ DECLARE_STREAMING_TEMPLATES( IMPEXP_COMMON_TEMPLATE_DECLARE, NameSpace::ElementModificationRequestPacket&lt;T&gt;, OtherNameSpace::NetPacketBase ) \ DLLIMPEXP_COMMON_TEMPLATE_DECLARE( NameSpace::ElementModificationRequestPacket&lt;T&gt; ) \ DECLARE_AUTOGENERATION_TEMPLATES( DLLIMPEXP_COMMON_TEMPLATE_DECLARE, NameSpace::T##ModificationRequestPacket, NameSpace::ElementModificationRequestPacket&lt;T&gt; ) \ \ namespace NameSpace { \ class DLLIMPEXP_COMMON T##ModificationRequestPacket : public ElementModificationRequestPacket&lt;T&gt;\ { \ public: \ T##ModificationRequestPacket( NetBase * pParent ) \ : ElementModificationRequestPacket&lt;T&gt;( pParent ), m_Gen() {} \ \ T##ModificationRequestPacket( NetBase * pParent, \ Action eAction, \ const T &amp; rT ) \ : ElementModificationRequestPacket&lt;T&gt;( pParent, eAction, rT ), m_Gen() {} \ \ T##ModificationRequestPacket( const T##ModificationRequestPacket &amp; rhs ) \ : ElementModificationRequestPacket&lt;T&gt;( rhs ), m_Gen() {} \ \ virtual ~T##ModificationRequestPacket( void ) {} \ \ virtual Uint32 GetPacketTypeID( void ) const \ { \ return Net::T##_Modification_REQUEST_PACKET; \ } \ \ virtual OtherNameSpace::ClassID GetClassID ( void ) const \ { \ return OtherNameSpace::NetBase::GenerateHeader( OtherNameSpace::ID__LICENSING, \ Net::T##_Modification_REQUEST_PACKET ); \ } \ \ virtual T##ModificationRequestPacket * Create( void ) const \ { return new T##ModificationRequestPacket( m_pParent ); } \ \ T##ModificationRequestPacket() {} \ \ protected: \ OtherNameSpace::ObjectAutogeneration&lt;T##ModificationRequestPacket&gt; m_Gen; \ \ friend class OtherNameSpace::StreamingBase::StreamingClassInfoT&lt;T##ModificationRequestPacket &gt;; \ OtherNameSpace::StreamingBase::Streaming&lt;T##ModificationRequestPacket, ElementModificationRequestPacket&lt;T&gt; &gt; m_Stream; \ \ }; \ } \ DLLIMPEXP_COMMON_TEMPLATE_DECLARE( ThirdNameSpace::ListenerBase&lt;const NameSpace::T##ModificationRequestPacket&gt; ) \ DLLIMPEXP_COMMON_TEMPLATE_DECLARE( ThirdNameSpace::BroadcasterT&lt;const NameSpace::T##ModificationRequestPacket&gt; ) \ typedef ThirdNameSpace::BroadcasterT&lt;const T##ModificationRequestPacket&gt; T##ModifiedBroadcaster; #define IMPLEMENT_MODIFICATION_REQUEST_PACKET( T ) \ DLLIMPEXP_COMMON_TEMPLATE_INSTANTIATE( NameSpace::ElementModificationRequestPacket&lt;T&gt; ) \ DLLIMPEXP_COMMON_TEMPLATE_INSTANTIATE( ThirdNameSpace::ListenerBase&lt;const NameSpace::T##ModificationRequestPacket&gt; ) \ DLLIMPEXP_COMMON_TEMPLATE_INSTANTIATE( ThirdNameSpace::BroadcasterT&lt;const NameSpace::T##ModificationRequestPacket&gt; ) \ INSTANTIATE_STREAMING_TEMPLATES( DLLIMPEXP_COMMON_TEMPLATE_INSTANTIATE, NameSpace::ElementModificationRequestPacket&lt;T&gt;, OtherNameSpace::NetPacketBase ) \ INSTANTIATE_AUTOGENERATION_TEMPLATES( DLLIMPEXP_COMMON_TEMPLATE_INSTANTIATE, NameSpace::T##ModificationRequestPacket, NameSpace::ElementModificationRequestPacket&lt;T&gt; ) </code></pre> <hr> <p>Update (December 17, 2009):</p> <p>More good news regarding this hideous macro author. As of August, the employee responsible for this monstrosity was sacked.</p>
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    1. POWhat is the worst real-world macros/pre-processor abuse you've ever come across?
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    2. COtoo long; backed away in terror
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    3. COI like (don't like) how the entire right-hand side of the screen is a sea of "\"
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