X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fcore%2Fexcept.h;h=6d34d4bd48d9309042c8f7fe6e6d9eb401053e2c;hb=5b0c36c9c6c9c30f1eb42186fed7acc7e99faf3e;hp=5dfbe8d03d56d56ac8a879eddc696dbb866670e5;hpb=4276e9a4f973949abf5b0fc3b83c0c93ace90a86;p=libs%2Fcore.git

diff --git a/source/core/except.h b/source/core/except.h
index 5dfbe8d..6d34d4b 100644
--- a/source/core/except.h
+++ b/source/core/except.h
@@ -1,9 +1,10 @@
 /* $Id$
 
 This file is part of libmspcore
-Copyright © 2006-2007 Mikko Rasa, Mikkosoft Productions
+Copyright © 2006-2008  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
+
 #ifndef MSP_CORE_ERROR_H_
 #define MSP_CORE_ERROR_H_
 
@@ -18,16 +19,19 @@ Base class for all Msp exceptions.
 */
 class Exception: public std::exception
 {
+private:
+	std::string wot;
+	std::string wer;
+	Debug::Backtrace bt;
+
 public:
 	Exception(const std::string &);
 	~Exception() throw() { }
 
-	const char *what() const throw() { return w.c_str(); }
+	const char *what() const throw() { return wot.c_str(); }
+	Exception &at(const std::string &) throw();
+	const char *where() const throw() { return wer.c_str(); }
 	const Debug::Backtrace &get_backtrace() const throw() { return bt; }
-private:
-	std::string w;
-	Debug::Backtrace bt;
-
 };
 
 /**
@@ -44,13 +48,15 @@ Thrown when a lookup from a map fails.
 */
 class KeyError: public Exception
 {
+private:
+	std::string key;
+
 public:
 	KeyError(const std::string &w_): Exception(w_) { }
 	KeyError(const std::string &w_, const std::string &k);
-	const std::string &get_key() const { return key; }
 	~KeyError() throw() { }
-private:
-	std::string key;
+
+	const std::string &get_key() const { return key; }
 };
 
 /**
@@ -67,11 +73,12 @@ Thrown when the application is invoked with wrong parameters.
 */
 class UsageError: public Exception
 {
+private:
+	bool brief;
+
 public:
 	UsageError(const std::string &r, bool b=true): Exception(r), brief(b) { }
 	bool get_brief() const { return brief; }
-private:
-	bool brief;
 };
 
 /**
@@ -79,15 +86,30 @@ Thrown when a system call fails.
 */
 class SystemError: public Exception
 {
+private:
+	int err;
+
 public:
 	SystemError(const std::string &, int);
 	int get_error_code() const { return err; }
-private:
-	int err;
 
+private:
 	static std::string build_what(const std::string &, int);
 };
 
+/**
+Thrown when "impossible" things happen.
+*/
+class LogicError: public Exception
+{
+public:
+	LogicError(const std::string &w_): Exception(w_) { }
+};
+
+template<typename E>
+void throw_at(E e, const std::string &a)
+{ e.at(a); throw e; }
+
 } // namespace Msp
 
 #endif