-class bad_definition: public runtime_error
-{
-public:
- bad_definition(const std::string &w):
- runtime_error(w)
- { }
-
- virtual ~bad_definition() throw() { }
-};
-
-class nesting_error: public logic_error
-{
-public:
- nesting_error(const std::string &w):
- logic_error(w)
- { }
-
- virtual ~nesting_error() throw() { }
-};
-
-