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Are "Traits" basically C++ Concepts?

• steveklabnik 12y ago
  There are some technical details that make them different, if I recall correctly. But they're kinda similar. They're also close to Haskell's typeclasses.
• nercury 12y ago
  For someone who knows C#, I would explain them as abstract extension methods that can be overriden for specific types.
• adrusi 12y ago
  Somewhere between C++ concepts and Haskell typeclasses with a hint of Java interfaces. But yes, their primary usage is to require that type parameters exhibit a certain set of properties.
• bjz_ 12y ago
  They fill the same role as concepts - ie. bringing type checking to the call site when using parametrized types, rather than using a duck typed approach, which leads to the big template stack traces that you get in C++.