Update exception handling in parallel for sample

The correct exception types are now caught by the catch clauses. Additionally we catch by const&.

Author: DuncanMcBain

samples/parallel-for/parallel-for.cpp

@@ -44,8 +44,8 @@ int main() {
  for (auto ep : l) {
  try {
  std::rethrow_exception(ep);
- } catch (std::exception& e) {
- std::cout << e.what();
+ } catch (const exception& e) {
+ std::cout << "Asynchronous exception caught:\n" << e.what();
  }
  }
  });
@@ -86,8 +86,8 @@ int main() {
  cgh.parallel_for<class assign_elements>(myRange, myKernel);
  });
 
- } catch (exception e) {
- std::cout << "SYCL exception caught: " << e.what();
+ } catch (const exception& e) {
+ std::cout << "Synchronous exception caught:\n" << e.what();
  return 2;
  }