pqxx::usage_error Class Reference

Error in usage of libpqxx library, similar to std::logic_error. More...

#include <except.hxx>

Inheritance diagram for pqxx::usage_error:

Collaboration diagram for pqxx::usage_error:

Public Member Functions
	usage_error (const PGSTD::string &)

Private Member Functions
virtual const PGSTD::exception &	base () const throw ()
	Return std::exception base-class object. More...

Detailed Description

Error in usage of libpqxx library, similar to std::logic_error.

Constructor & Destructor Documentation

pqxx::usage_error::usage_error ( const PGSTD::string &  )

explicit

Member Function Documentation

virtual const PGSTD::exception& pqxx::usage_error::base ( ) const throw ()

inlineprivatevirtual

Return std::exception base-class object.

Use this to get at the exception's what() function, or to downcast to a more specific type using dynamic_cast.

Casting directly from pqxx_exception to a specific exception type is not likely to work since pqxx_exception is not (and could not safely be) derived from std::exception.

For example, to test dynamically whether an exception is an sql_error:

try
{
  // ...
}
catch (const pqxx::pqxx_exception &e)
{
  std::cerr << e.base().what() << std::endl;
  const pqxx::sql_error *s=dynamic_cast<const pqxx::sql_error*>(&e.base());
  if (s) std::cerr << "Query was: " << s->query() << std::endl;
}

Implements pqxx::pqxx_exception.

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The documentation for this class was generated from the following file:

• /usr/include/pqxx/except.hxx