diff -r 10d378f2821c -r 21d1b4fa1b24 src/lemon/error.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/lemon/error.h	Mon Nov 15 13:10:35 2004 +0000
@@ -0,0 +1,81 @@
+/* -*- C++ -*-
+ * src/lemon/error.h - Part of LEMON, a generic C++ optimization library
+ *
+ * Copyright (C) 2004 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
+ * (Egervary Combinatorial Optimization Research Group, EGRES).
+ *
+ * Permission to use, modify and distribute this software is granted
+ * provided that this copyright notice appears in all copies. For
+ * precise terms see the accompanying LICENSE file.
+ *
+ * This software is provided "AS IS" with no warranty of any kind,
+ * express or implied, and with no claim as to its suitability for any
+ * purpose.
+ *
+ */
+
+#ifndef LEMON_ERROR_H
+#define LEMON_ERROR_H
+
+//! \ingroup misc
+//! \file
+//! \brief Basic error handling (signaling) routines.
+
+#include <exception>
+#include <string>
+#include <sstream>
+
+
+namespace lemon {
+
+  /**
+   * \brief Generic exception class.
+   *
+   * \todo Do we need this?
+   *
+   * \todo Don't we need different kind of exceptions for different kind
+   * of errors?
+   * Shouldn't we use \<stdexcept\> instead?
+   */
+  class Exception : public std::exception {
+  protected:
+    std::ostringstream buf;
+  public:
+    Exception() {}
+    explicit Exception(const std::string &s) { buf << s; }
+    Exception(const Exception &e) : std::exception() {
+      buf << e.buf.str();
+    }
+    virtual ~Exception() throw() {}
+    
+    virtual const char* what() const throw() {
+      return buf.str().c_str();
+    }
+
+    template <typename T>
+    Exception& operator<<(T const& t) { buf << t; return *this; }
+  };
+
+  /**
+   * \brief Generic error signaling function.
+   *
+   * \todo Do we really need this? Is it helpful?
+   */
+  inline void fault(const std::string &msg) {
+    throw Exception(msg);
+  }
+
+  /**
+   * \brief Macro for mark not yet implemented features.
+   *
+   * \todo Is this the right place for this? It should be used only in
+   * modules under development.
+   */
+
+# define FIXME(msg) \
+    do { throw ::lemon::Exception() << "FIXME: " msg " (in: "    \
+      __FILE__ ", " << __LINE__ << ")";                          \
+    } while(false)
+
+}
+#endif // LEMON_ERROR_H