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Changed template so it takes an exception object as argument, not a

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char* to use as the argument to the exception object.  This may end
up copying the object, but it's now completely flexible (an exception
class must be copy-constructable anyhow).
This commit is contained in:
Andrew Johnson
2001-03-27 20:45:59 +00:00
parent 5ad4bfcd11
commit 34ea7db15b
1 changed files with 23 additions and 19 deletions
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42
src/libCom/cppStd/epicsExcept.h
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@@ -5,31 +5,35 @@
#ifndef __EPICS_EXCEPT_H__
#define __EPICS_EXCEPT_H__
#define epicsThrowHere(exc, msg) \
throw locationException<exc>(msg, __FILE__, __LINE__)
#define epicsThrowHere(exc) \
throw locationException(exc, __FILE__, __LINE__)
class sourceLocation {
public:
sourceLocation (const char *fileName, int lineNumber);
const char *fileName () const;
int lineNumber () const;
public: // Functions
sourceLocation(const char *fileName, int lineNumber);
// sourceLocation(const sourceLocation&); Copy constructable
// sourceLocation& operator=(const sourceLocation&); Assignable
private:
const char *pFileName;
int lineNumberCopy;
const char *fileName() const;
int lineNumber() const;
private: // Hide compiler-generated member functions
sourceLocation(); // default constructor
private: // Data
const char *file;
int line;
};
template <class T>
class locationException : public T, public sourceLocation {
public:
locationException(const char *msg, const char *fileName, int lineNumber);
// NB: In standard exception classes the msg argument is a string&
// I've used const char* here to avoid having to include <string>
locationException(const T& exc, const char *fileName, int lineNumber);
};
/* Examples:
* if (status) epicsThrowHere(std::logic_error, "failed!");
/* Example:
* if (status) epicsThrowHere(std::logic_error("operation failed!"));
* try { ... } catch(sourceLocation& where) { ... }
*/
@@ -39,21 +43,21 @@ public:
// sourceFileLocation
inline sourceLocation::sourceLocation (const char *fileName, int lineNumber) :
pFileName (fileName) , lineNumberCopy(lineNumber) {}
file(fileName), line(lineNumber) {}
inline const char* sourceLocation::fileName () const {
return this->pFileName;
return this->file;
}
inline int sourceLocation::lineNumber () const {
return this->lineNumberCopy;
return this->line;
}
// locationException<T>
template <class T>
inline locationException<T>::locationException
(const char* msg, const char *fileName, int lineNumber) :
T(msg), sourceLocation(fileName, lineNumber) {}
(const char *fileName, int lineNumber, const E& exc) :
T(exc), sourceLocation(fileName, lineNumber) {}
#endif // __EPICS_EXCEPT_H__