toast/log/verbosity_policies.hpp

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#ifndef toast_log_verbosity_policies_hpp_INCLUDED
#define toast_log_verbosity_policies_hpp_INCLUDED

#include <toast/log/severity.hpp>

namespace toast {
  namespace log {
    
    template <typename Policy>
    struct VerbosityPolicyConcept
    {
      void constraints() {
        b = p.check(DEBUG);
      }
    private:
      bool b;
      Policy p;
    };
    
    struct always_output {
      bool check(log::severity severity) const { return true; }
    protected:
      ~always_output() {}
    };
    
    struct never_output {
      bool check(log::severity severity) const { return false; }
    protected:
      ~never_output() {}
    };
    
    struct check_verbosity
    {
      check_verbosity() : verbosity_(DEBUG) {}
      
      bool check(log::severity severity) const
      {
        return verbosity_ >= severity; 
      }
      
      log::severity verbosity() { return verbosity_; }
      void verbosity(log::severity v) { verbosity_ = v; }
    protected:
      ~check_verbosity() {}
    private:
      log::severity verbosity_;
    };

  }
}

#endif // toast_log_verbosity_policies_hpp_INCLUDED

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