temporary object, function parameters and implicit cast

Question

In the following scenario:

struct Foo
{
   // ...
   operator Bar() {... }  // implicit cast to Bar
}

Foo GetFoo() { ... }
void CallMeBar(Bar x) { ... }

// ...         


        

Answer 1

As long as you return them by value, they survive until CallMeBar is finished.

Your cast operator is a little off, though. Should be:

struct Foo
{
   // ...
  operator Bar() {... }  // implicit cast to Bar
}

See e.g. http://msdn.microsoft.com/en-us/library/ts48df3y(VS.80).aspx