Dune Core Modules (unstable)

Exception handling


file  exceptions.hh
 A few common exception classes.


class  Dune::Exception
 Base class for Dune-Exceptions. More...
struct  Dune::ExceptionHook
 Base class to add a hook to the Dune::Exception. More...
class  Dune::IOError
 Default exception class for I/O errors. More...
class  Dune::MathError
 Default exception class for mathematical errors. More...
class  Dune::RangeError
 Default exception class for range errors. More...
class  Dune::NotImplemented
 Default exception for dummy implementations. More...
class  Dune::SystemError
 Default exception class for OS errors. More...
class  Dune::OutOfMemoryError
 Default exception if memory allocation fails. More...
class  Dune::InvalidStateException
 Default exception if a function was called while the object is not in a valid state for that function. More...
class  Dune::ParallelError
 Default exception if an error in the parallel communication of the program occurred. More...


#define DUNE_THROW(E, m)


void Dune::Exception::message (const std::string &msg)
 store string in internal message buffer
const char * Dune::Exception::what () const noexcept override
 output internal message buffer
static void Dune::Exception::registerHook (ExceptionHook *hook)
 add a functor which is called before a Dune::Exception is emitted (see Dune::ExceptionHook) More...
static void Dune::Exception::clearHook ()
 remove all hooks

Detailed Description

The Dune-exceptions are designed to allow a simple derivation of subclasses and to accept a text written in the '<<' syntax.

Example of usage:

class FileNotFoundError : public Dune::IOError {};
void fileopen (std::string name) {
std::ifstream file;
if (file == 0)
DUNE_THROW(FileNotFoundError, "File " << name << " not found!");
int main () {
try {
} catch (Dune::IOError &e) {
std::cerr << "I/O error: " << e << std::endl;
return 1;
} catch (Dune::Exception &e) {
std::cerr << "Generic Dune error: " << e << std::endl;
return 2;
See also
exceptions.hh for detailed info

Macro Definition Documentation


#define DUNE_THROW (   E,
do { E th__ex; std::ostringstream th__out; \
th__out << THROWSPEC(E) << m; th__ex.message(th__out.str()); throw th__ex; \
} while (0)

Macro to throw an exception

Eexception class derived from Dune::Exception
mreason for this exception in ostream-notation


if (filehandle == 0)
DUNE_THROW(FileError, "Could not open " << filename << " for reading!");

DUNE_THROW automatically adds information about the exception thrown to the text.

you can add a hook to be called before a Dune::Exception is emitted, e.g. to add additional information to the exception, or to invoke a debugger during parallel debugging. (see Dune::ExceptionHook)

Function Documentation

◆ registerHook()

void Dune::Exception::registerHook ( ExceptionHook hook)

add a functor which is called before a Dune::Exception is emitted (see Dune::ExceptionHook)

See also
#define DUNE_THROW(E, m)
Definition: exceptions.hh:216
Base class for Dune-Exceptions.
Definition: exceptions.hh:94
Default exception class for I/O errors.
Definition: exceptions.hh:229
A few common exception classes.
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