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Feature Request #1873924

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Add code (int) to Poco::Exception with default value zero. When throwing exceptions, applications can currently set a custom message. This will add the ability to set a custom code as well, that is specific to the application. This change implements codes for Poco::SocketImpl via the error() method to allow handling of different socket errors based on their actual type (without having to compare their message text).
This commit is contained in:
Eran Hammer-Lahav
2008-01-17 19:07:35 +00:00
parent 19dca2aa79
commit 1f47c0df2f
3 changed files with 109 additions and 97 deletions
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124
Foundation/include/Poco/Exception.h
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@@ -52,13 +52,13 @@ class Foundation_API Exception: public std::exception
/// in the Poco class library.
{
public:
Exception(const std::string& msg);
Exception(const std::string& msg, int code = 0);
/// Creates an exception.
Exception(const std::string& msg, const std::string& arg);
Exception(const std::string& msg, const std::string& arg, int code = 0);
/// Creates an exception.
Exception(const std::string& msg, const Exception& nested);
Exception(const std::string& msg, const Exception& nested, int code = 0);
/// Creates an exception and stores a clone
/// of the nested exception.
@@ -88,6 +88,9 @@ public:
const std::string& message() const;
/// Returns the message text.
int code() const;
/// Returns the exception code if defined.
std::string displayText() const;
/// Returns a string consisting of the
@@ -107,12 +110,13 @@ public:
/// throwing it again.
protected:
Exception();
Exception(int code = 0);
/// Standard constructor.
private:
std::string _msg;
Exception* _pNested;
int _code;
};
@@ -131,6 +135,12 @@ inline const std::string& Exception::message() const
}
inline int Exception::code() const
{
return _code;
}
//
// Macros for quickly declaring and implementing exception classes.
// Unfortunately, we cannot use a template here because character
@@ -138,62 +148,62 @@ inline const std::string& Exception::message() const
// are not allowed as template arguments.
//
#define POCO_DECLARE_EXCEPTION(API, CLS, BASE) \
class API CLS: public BASE \
{ \
public: \
CLS(); \
CLS(const std::string& msg); \
CLS(const std::string& msg, const std::string& arg); \
CLS(const std::string& msg, const Poco::Exception& exc); \
CLS(const CLS& exc); \
~CLS() throw(); \
CLS& operator = (const CLS& exc); \
const char* name() const throw(); \
const char* className() const throw(); \
Poco::Exception* clone() const; \
void rethrow() const; \
class API CLS: public BASE \
{ \
public: \
CLS(int code = 0); \
CLS(const std::string& msg, int code = 0); \
CLS(const std::string& msg, const std::string& arg, int code = 0); \
CLS(const std::string& msg, const Poco::Exception& exc, int code = 0); \
CLS(const CLS& exc); \
~CLS() throw(); \
CLS& operator = (const CLS& exc); \
const char* name() const throw(); \
const char* className() const throw(); \
Poco::Exception* clone() const; \
void rethrow() const; \
};
#define POCO_IMPLEMENT_EXCEPTION(CLS, BASE, NAME) \
CLS::CLS() \
{ \
} \
CLS::CLS(const std::string& msg): BASE(msg) \
{ \
} \
CLS::CLS(const std::string& msg, const std::string& arg): BASE(msg, arg) \
{ \
} \
CLS::CLS(const std::string& msg, const Poco::Exception& exc): BASE(msg, exc) \
{ \
} \
CLS::CLS(const CLS& exc): BASE(exc) \
{ \
} \
CLS::~CLS() throw() \
{ \
} \
CLS& CLS::operator = (const CLS& exc) \
{ \
BASE::operator = (exc); \
return *this; \
} \
const char* CLS::name() const throw() \
{ \
return NAME; \
} \
const char* CLS::className() const throw() \
{ \
return typeid(*this).name(); \
} \
Poco::Exception* CLS::clone() const \
{ \
return new CLS(*this); \
} \
void CLS::rethrow() const \
{ \
throw *this; \
#define POCO_IMPLEMENT_EXCEPTION(CLS, BASE, NAME) \
CLS::CLS(int code): BASE(code) \
{ \
} \
CLS::CLS(const std::string& msg, int code): BASE(msg, code) \
{ \
} \
CLS::CLS(const std::string& msg, const std::string& arg, int code): BASE(msg, arg, code) \
{ \
} \
CLS::CLS(const std::string& msg, const Poco::Exception& exc, int code): BASE(msg, exc, code) \
{ \
} \
CLS::CLS(const CLS& exc): BASE(exc) \
{ \
} \
CLS::~CLS() throw() \
{ \
} \
CLS& CLS::operator = (const CLS& exc) \
{ \
BASE::operator = (exc); \
return *this; \
} \
const char* CLS::name() const throw() \
{ \
return NAME; \
} \
const char* CLS::className() const throw() \
{ \
return typeid(*this).name(); \
} \
Poco::Exception* CLS::clone() const \
{ \
return new CLS(*this); \
} \
void CLS::rethrow() const \
{ \
throw *this; \
}