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<p class="MsoPlainText">I have just installed Haskell using Stack on Windows.<o:p></o:p></p>
<p class="MsoPlainText">I wanted to try and write some code to do network programming with TCP/IP.<o:p></o:p></p>
<p class="MsoPlainText">I found a simple example on Stack Overflow to start me off.<o:p></o:p></p>
<p class="MsoPlainText">I’m having some problems with PortNumber and deprecated warnings.<o:p></o:p></p>
<p class="MsoPlainText">I don't know how to modify the code to be deprecation free.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">stack install network – installed version 2.8.0.1<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">-------------------------<o:p></o:p></p>
<p class="MsoPlainText">package.yaml<o:p></o:p></p>
<p class="MsoPlainText">network >= 2.8.0.1<o:p></o:p></p>
<p class="MsoPlainText">---------------------------<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">The following code gives a deprecation warning, but ultimately my sample compiles and runs.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">import qualified Network<o:p></o:p></p>
<p class="MsoPlainText">import qualified Network.Socket<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">main = Network.withSocketsDo $ do<o:p></o:p></p>
<p class="MsoPlainText"> handle <- Network.connectTo "192.168.1.2" (Network.PortNumber 7200)<o:p></o:p></p>
<p class="MsoPlainText"> talk handle `finally` hClose handle<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">D:\work\hsSocket\app\Main.hs:14:46: warning: [-Wdeprecations]<o:p></o:p></p>
<p class="MsoPlainText"> In the use of data constructor `PortNumber'<o:p></o:p></p>
<p class="MsoPlainText"> (imported from Network):<o:p></o:p></p>
<p class="MsoPlainText"> Deprecated: "The high level Network interface is no longer supported. Please use Network.Socket."<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">-----------------------------------------<o:p></o:p></p>
<p class="MsoPlainText">So, now I try and use Network.Socket as the warning indicates.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">main = Network.withSocketsDo $ do<o:p></o:p></p>
<p class="MsoPlainText"> handle <- Network.connectTo "192.168.1.2" (Network.Socket.PortNumber 7200)<o:p></o:p></p>
<p class="MsoPlainText"> talk handle `finally` hClose handle<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">D:\work\hsSocket\app\Main.hs:15:46: error:<o:p></o:p></p>
<p class="MsoPlainText"> Not in scope: data constructor `Network.Socket.PortNumber'<o:p></o:p></p>
<p class="MsoPlainText"> Module `Network.Socket' does not export `PortNumber'.<o:p></o:p></p>
<p class="MsoPlainText"> |<o:p></o:p></p>
<p class="MsoPlainText">15 | handle <- Network.connectTo "192.168.1.2" (Network.Socket.PortNumber 7200)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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