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extern/stdcxx/4.2.1/examples/tutorial/stdexcept.cpp

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+/**************************************************************************
+ *
+ * stdexcept.cpp - Illustrate the use of C++ Standard Library exceptions.
+ *
+ * $Id: stdexcept.cpp 550991 2007-06-26 23:58:07Z sebor $
+ *
+ ***************************************************************************
+ *
+ * Licensed to the Apache Software  Foundation (ASF) under one or more
+ * contributor  license agreements.  See  the NOTICE  file distributed
+ * with  this  work  for  additional information  regarding  copyright
+ * ownership.   The ASF  licenses this  file to  you under  the Apache
+ * License, Version  2.0 (the  "License"); you may  not use  this file
+ * except in  compliance with the License.   You may obtain  a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ *
+ * Copyright 1994-2005 Rogue Wave Software.
+ * 
+ **************************************************************************/
+
+#include <string>      // for string
+#include <stdexcept>   // for exception, runtime_error, out_of_range
+#include <iostream>    // for cout
+
+#include <examples.h>
+
+
+#ifndef _RWSTD_NO_EXCEPTIONS
+
+int main () {
+    
+    // First we'll incite and catch an exception from the C++ Standard
+    // library class std::string by attempting to replace a substring
+    // starting at a position beyond the end of the string object.
+    try {
+        std::string ().replace (100, 1, 1, 'c');
+    }
+    catch (std::out_of_range &e) {
+
+        // Print out the exception string, which in this implementation
+        // includes the location and the name of the function that threw
+        // the exception along with the reason for the exception.
+        std::cout << "Caught an out_of_range exception: "
+                  << e.what () << '\n';
+    }
+    catch (std::exception &e) {
+
+        std::cout << "Caught an exception of an unexpected type: "
+                  << e.what () << '\n';
+    }
+    catch (...) {
+        std::cout << "Caught an unknown exception\n";
+    }
+    
+    // Throw another exception.
+    try {
+        throw std::runtime_error ("a runtime error");
+    }
+    catch (std::runtime_error &e) {
+        std::cout << "Caught a runtime_error exception: "
+                  << e.what () << '\n';
+    }
+    catch (std::exception &e) {
+        std::cout << "Caught an exception of an unexpected type: "
+                  << e.what () << '\n';
+    } 
+    catch (...) {
+        std::cout << "Caught an unknown exception\n";
+    }
+   
+    return 0;
+}
+
+#else   // if defined (_RWSTD_NO_EXCEPTIONS)
+
+int main () {
+    
+    std::cout << "Exception support disabled.\n";
+
+    return 0;
+}
+
+#endif   // _RWSTD_NO_EXCEPTIONS