Exceptions/Catch an exception thrown in a nested call: Difference between revisions

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 An unhandled exception leads to termination of the corresponding [[task]]. When the task is the main task of the program as in the example, the whole program is terminated. In the example the exception back tracing message is compiler-specific (in this case it is [[GNAT]] and further depends on the compiler options.
+=={{header|C++}}==
+First exception will be caught and message will be displayed, second will be caught by the default exception handler, which as required by the C++ Standard, will call terminate(), aborting the task,
+typically with an error message.
+<lang C++>
+#include <iostream>
+class U0 {};
+class U1 {};
+void baz(int i)
+{
+    if (!i) throw U0();
+    else throw U1();
+}
+void bar(int i) { baz(i); }
+void foo()
+{
+    for (int i = 0; i < 2; i++)
+    {
+        try {
+            bar(i);
+        } catch(U0 e) {
+		std::cout<< "Exception U0 caught\n";
+        }
+    }
+}
+int main() {
+    foo();
+    std::cout<< "Should never get here!\n";
+    return 0;
+}
+</lang>
+Result:
+<pre>
+Exception U0 caught
+This application has requested the Runtime to terminate it in an unusual way.
+</pre>
+The exact behavior for an uncaught exception is implementation-defined.
 =={{header|D}}==
 First exception will be caught and message will be displayed, second will be caught by default exception handler.