Version 0.90

mrw/examples/exceptionhandling.cpp

@@ -0,0 +1,55 @@
+#include <mrw/exception.hpp>
+#include <mrw/stacktrace.hpp>
+#include <exception>
+#include <iostream>
+
+void unexpectedHandler() {
+  try {
+    throw;
+  } catch (mrw::exception& x) {
+    mrw::StackTrace::createSymtable();
+    std::cerr<<"UNEXPECTED:"<<x.what()<<std::endl
+             <<"---------------------------Stack:"<<std::endl
+             <<x.stacktrace()
+             <<"---------------------------------"<<std::endl;
+  } catch (std::exception& x) {
+    std::cerr<<"UNEXPECTED:"<<x.what()<<std::endl;
+  } catch (...) {
+    std::cerr<<"UNKNOWN UNEXPECTED"<<std::endl;
+  }
+  throw std::bad_exception(); // try to recover
+}
+
+void fn2() throw(std::bad_exception) {
+  std::cout<<"enter fn2"<<std::endl;
+  throw mrw::exception(); // that's wrong, no exception excpected
+  std::cout<<"leave fn2"<<std::endl;
+}
+
+void fn1() throw(std::bad_exception) {
+  std::cout<<"enter fn1"<<std::endl;
+  fn2();
+  std::cout<<"leave fn1"<<std::endl;
+}
+
+void fn0() throw(std::bad_exception) {
+  std::cout<<"enter fn0"<<std::endl;
+  try {
+    fn1();
+  }  catch (std::exception& x) {
+    std::cerr<<"EXCEPTION caught in fn0:"<<x.what()<<std::endl;
+  }
+  std::cout<<"leave fn0"<<std::endl;
+}
+
+int main() {
+  std::set_unexpected(&unexpectedHandler);
+  try {
+    std::cout<<"call fn0"<<std::endl;
+    fn0();
+    std::cout<<"call of fn0 successful"<<std::endl;
+  } catch (...) {
+    std::cerr<<"OOOPS!!!"<<std::endl;
+  }
+  return 0;
+}