b286c6b0   
   From: daniel.kruegler@googlemail.com   
      
   On 2012-05-10 10:17, David Barrett-Lennard wrote:   
   > In the following example I want foo() to select the implementation   
   > based on a trait is_blah which is true for struct X.  When foo() is   
   > passed a const X*, VS2008 and VS2010 select the implementation   
   > assuming is_blah is false.  Is this the expected behaviour?   
      
   Sure. Fact is, function template foo deduces for T a type const X and   
   hands it over to is_blah. This template has no specialization for type   
   const X (There is a specialization for type X, but this is a different   
   type). Best is to use typename std::remove_cv::type (or the   
   corresponding boost variant of that trait) here:   
      
   S::type>::value>::imp(p);   
      
   HTH & Greetings from Bremen,   
      
   Daniel Krügler   
      
      
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