93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
/**
|
|
* @file yapie.hh
|
|
*
|
|
* @defgroup yap-cplus-error-hanadlinge Error Handling in the YAP interface.
|
|
*
|
|
* @brief error handling in C++ and OO languages
|
|
*
|
|
* @ingroup yap-cplus-interface
|
|
*
|
|
*
|
|
* @{
|
|
*
|
|
* These classes define an object that we can then throw when an error
|
|
* or unexoected event interrupts YAP. Often, the object is built by
|
|
* YAP itself. One can also define one's own error objects.
|
|
*
|
|
* Errors will be thrown from the `C++` code, and may be processed in
|
|
* very different ways. The error object should provide as much data as
|
|
* possible.
|
|
*/
|
|
|
|
|
|
#ifndef YAPIE_HH
|
|
#define YAPIE_HH
|
|
|
|
class X_API YAPPPredicate;
|
|
|
|
|
|
|
|
/// take information on a Prolog error:
|
|
class X_API YAPError {
|
|
//int swigcode;
|
|
yap_error_descriptor_t *info;
|
|
|
|
public:
|
|
/// wraps the default error descriptor
|
|
YAPError() {
|
|
info = LOCAL_ActiveError;
|
|
if (!info)
|
|
LOCAL_ActiveError = info = (yap_error_descriptor_t *)calloc( sizeof( yap_error_descriptor_t ), 1);
|
|
// if (info->errorNo != YAP_NO_ERROR) {};
|
|
//std::cerr << "Error detected" << info->errorNo << "\n";
|
|
}
|
|
/// if des != nullptr, wrap a preexisting error descriptor;
|
|
/// otherwise, generate a new one
|
|
YAPError(yap_error_descriptor_t *des) {
|
|
if (des)
|
|
info= des;
|
|
else info = (yap_error_descriptor_t *)calloc( sizeof( yap_error_descriptor_t ), 1);
|
|
// if (info->errorNo != YAP_NO_ERROR) {};
|
|
//std::cerr << "Error detected" << info->errorNo << "\n";
|
|
|
|
}
|
|
|
|
|
|
/// error handler object with initial data when receiving the error term
|
|
// YAPError( std::string file, std::string function, int lineno,
|
|
// yap_error_number id, YAPTerm culprit, std::string txt) {
|
|
// info = new yap_error_descriptor_t;
|
|
// Yap_MkErrorRecord(info, file.c_str(), function.c_str(), lineno, id, culprit.term(), txt.c_str());
|
|
//}
|
|
|
|
/// error handler object with initial data when receiving the error term
|
|
YAPError( const char * file, const char * function, int lineno,
|
|
yap_error_number id, YAP_Term culprit, const char * txt) {
|
|
info = (yap_error_descriptor_t *)calloc( sizeof( yap_error_descriptor_t ), 1);
|
|
Yap_MkErrorRecord(info, file, function, lineno, id, culprit, txt);
|
|
}
|
|
|
|
/// short version
|
|
#define SOURCE() __FILE__, __FUNCTION__, __LINE__
|
|
|
|
/// we just know the error number
|
|
/// exact error ID
|
|
yap_error_number getID() { return info->errorNo; };
|
|
/// class of error
|
|
yap_error_class_number getErrorClass() {
|
|
return Yap_errorClass(info->errorNo);
|
|
};
|
|
/// where in the code things happened;
|
|
const char *getFile() { return info->errorFile; };
|
|
/// predicate things happened;
|
|
Int getLine() { return info->errorLine; };
|
|
/// the term that caused the bug
|
|
// YAPTerm getCulprit(info->errorFile){};
|
|
/// text describing the Error
|
|
std::string text();
|
|
};
|
|
|
|
#endif
|
|
|
|
/// @}
|