![\"DKit](\"http:\/\/bobbeaty.com\/wp\/wp-content\/uploads\/2012\/03\/DKit.jpg\" "\\"DKit.jpg\\"")
<\/p>\n<\/p>\n
Today I wanted to add a little bit more to DKit, so I decided that the next best thing to add were the concepts of a template<\/em> source and sink. When I built the MessageSource<\/tt> and MessageSink<\/tt> back at PEAK6, I did it in the context of a Message<\/tt> object. That was fine, because that's all we needed, but this time I wanted to make it a little better - no a lot<\/em><\/strong> better, so I made the source and sink template classes.<\/p>\n This will allow me to use the pointers like I did before, but it will also make it very easy to use integers, or doubles - or anything. This will be a far better solution to the problem than a fixed class, or pointer to a class.<\/p>\n The only real problem I ran into - if there was indeed any<\/em> real problems, was the syntax for specifying the template class methods in the implementation file. The header was pretty clear and straight forward, but the implementation was a bit trickier.<\/p>\n Thankfully, I was able to find some examples on the web, but the syntax was pretty bad. I mean really<\/em> bad. For example, let's say I had the following template class:<\/p>\n then the implementation file would have to look something like this:<\/p>\n Now I understand the need to clearly identify the class - hence the template <class T><\/tt> on the front, but then it seems to really go overboard there. While I'm sure there's a wonderful reason for all this, it seems to have not undergone any simplification over the years. That's probably part of the problem that folks have with C++ - it's complicated looking. And if you don't get it just right<\/em>, you're not going to even get it to compile.<\/p>\n But for me, it's just what has to be done in order to have template programming. It's a pain, yes, but it's so incredibly worth it.<\/p>\n","protected":false},"excerpt":{"rendered":" Today I wanted to add a little bit more to DKit, so I decided that the next best thing to add were the concepts of a template source and sink. When I built the MessageSource and MessageSink back at PEAK6, I did it in the context of a Message object. That was fine, because that’s […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,7,4],"tags":[],"class_list":["post-5817","post","type-post","status-publish","format-standard","hentry","category-coding","category-everything-else","category-open-source-software"],"_links":{"self":[{"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/posts\/5817","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/comments?post=5817"}],"version-history":[{"count":2,"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/posts\/5817\/revisions"}],"predecessor-version":[{"id":5819,"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/posts\/5817\/revisions\/5819"}],"wp:attachment":[{"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/media?parent=5817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/categories?post=5817"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bobbeaty.com\/wp\/wp-json\/wp\/v2\/tags?post=5817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} namespace<\/span> dkit {<\/span>\n template<\/span> <<\/span>class<\/span> T><\/span> class<\/span> source\n {<\/span>\n public<\/span>:<\/span>\n \n virtual<\/span> void<\/span> setName(<\/span> const<\/span> std::<\/span>string<\/span> &<\/span> aName )<\/span>;<\/span>\n virtual<\/span> const<\/span> std::<\/span>string<\/span> &<\/span> getName(<\/span>)<\/span> const<\/span>;<\/span>\n virtual<\/span> bool<\/span> addToListeners(<\/span> sink<<\/span>T><\/span> *<\/span>aSink )<\/span>;<\/span>\n \n }<\/span>;<\/span>\n }<\/span> \/\/ end of namespace dkit<\/span><\/pre>\n namespace<\/span> dkit {<\/span>\n \n template<\/span> <<\/span>class<\/span> T><\/span> void<\/span> source<<\/span>T><\/span>::<\/span>setName<\/span>(<\/span> const<\/span> std::<\/span>string<\/span> &<\/span> aName )<\/span>\n {<\/span>\n boost::<\/span>detail<\/span>::<\/span>spinlock<\/span>::<\/span>scoped_lock<\/span> lock(<\/span>mMutex)<\/span>;<\/span>\n mName =<\/span> aName;<\/span>\n }<\/span>\n \n \n template<\/span> <<\/span>class<\/span> T><\/span> const<\/span> std::<\/span>string<\/span> &<\/span> source<<\/span>T><\/span>::<\/span>getName<\/span>(<\/span>)<\/span> const<\/span>\n {<\/span>\n return<\/span> mName;<\/span>\n }<\/span>\n \n \n template<\/span> <<\/span>class<\/span> T><\/span> bool<\/span> source<<\/span>T><\/span>::<\/span>addToListeners<\/span>(<\/span> sink<<\/span>T><\/span> *<\/span>aSink )<\/span>\n {<\/span>\n bool<\/span> added =<\/span> false<\/span>;<\/span>\n \/\/ first, make sure there's something to do<\/span>\n if<\/span> (<\/span>aSink !<\/span>=<\/span> NULL<\/span>)<\/span> {<\/span>\n \/\/ next, see if we can add us as a source to him<\/span>\n if<\/span> (<\/span>aSink-<\/span>><\/span>addToSources(<\/span>this<\/span>)<\/span>)<\/span> {<\/span>\n \/\/ finally, make sure we can add him to us<\/span>\n added =<\/span> addToSinks(<\/span>aSink)<\/span>;<\/span>\n }<\/span>\n }<\/span>\n return<\/span> added;<\/span>\n }<\/span>\n \n }<\/span> \/\/ end of namespace dkit<\/span><\/pre>\n