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yap-6.3/CXX/yapie.hh
Vitor Santos Costa 9be6eb9132 small bugs
2018-11-23 00:01:55 +00:00

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
/// @}