rootana/src/framework/AlcapExcept.h

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// Shamelessly lifted from COMET (ND280) code
//
#ifndef ALCAPEXCEPT_H_
#define ALCAPEXCEPT_H_

#include <exception>
#include <string>

namespace Except {
    class Base;
}

class Except::Base: public std::exception {
  char fTrace[2048];
  char fWhat[256];
  
public:
  static unsigned int gBacktraceSymbols;
  
  Base();
  virtual ~Base() throw() {}
  
  const char* what(void) const throw() {return fWhat;}

  const char* bt(void) const throw() {return fTrace;}
  
  void AppendWhat(const char* child);

  void AppendWhat(const char* child, const char* message);

  void AppendWhat(const char* child, const char* file, int line);
};

#define STRINGIFY_1(x) #x
#define STRINGIFY_2(x) STRINGIFY_1(x)
#define LOCATION __FILE__ ":" STRINGIFY_2(__LINE__)

#ifndef MAKE_EXCEPTION
#define MAKE_EXCEPTION(NAME, PARENT)                          \
  namespace Except {                                          \
    class NAME : public PARENT {                              \
    public:                                                   \
      NAME() {AppendWhat(#NAME);}                             \
      NAME(const char* message) {AppendWhat(#NAME, message);} \
      NAME(const char* file, int line) {AppendWhat(#NAME, file, line);}     \
    };                                                        \
  }                                             
#endif //MAKE_EXCEPTION
#endif //ALCAPEXCEPT_H_

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