semantics.hh

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#ifndef semantics_hh
#define semantics_hh
 
#include "basics/outputOperator.hh"
#include "basics/output.hh"
 
namespace concepts {
 
  // forward declarations
  class Attribute;
 
  // ************************************************************* Semantics **
 
  template<class T>
  class Semantics : public OutputOperator {
  public:
    virtual T operator()(Attribute attrib) const = 0;
  protected:
    virtual std::ostream& info(std::ostream& os) const {
      return os << concepts::typeOf(*this)<<"()"; }
  };
 
  // ********************************************************* AttributeBool **
 
  class AttributeBool : public Semantics<bool> {
  public:
    bool operator()(Attribute attrib) const;
  protected:
    virtual std::ostream& info(std::ostream& os) const;
  };
 
} // namespace concepts
 
#endif // semantics_hh