Discriminated error state used by query and subquery results. More...

#include <querygraph.hpp>

Public Member Functions
	error_result ()=default
	Construct an empty error state.

bool	has_error () const
	Return whether either error representation is present.

bool	has_canonical_error () const
	Return whether a serializable canonical error is present.

bool	has_unexpected_exception () const
	Return whether an unexpected exception is present.

status	result_status () const
	Return the dump status represented by this error state.

std::exception_ptr	unexpected_exception () const
	Return the unexpected exception pointer, if present.

std::exception_ptr	make_exception_ptr () const
	Materialize either error representation as an exception pointer.

void	throw_error () const
	Rethrow the stored error; do nothing when the state is empty.

std::string	message () const
	Return the error message, or an empty string for no error.

std::optional< canonical_error_result_data >	canonical_dump () const
	Return serializable data only when the error is canonical.

Static Public Member Functions
static error_result	canonical (canonical_error_storage error)
	Construct an error state from canonical storage.

static error_result	unexpected (std::exception_ptr exception)
	Construct an error state from an unexpected exception.

Detailed Description

Discriminated error state used by query and subquery results.

A result has either no error, one canonical error, or one unexpected exception. Canonical errors are suitable for stable graph dumps; unexpected exceptions preserve only their process-local exception pointer.

Definition at line 459 of file querygraph.hpp.

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

querygraph.hpp

Public Member Functions

Static Public Member Functions

Detailed Description