Can someone explain the difference between a C++ exception and a structured exception in MFC?
Can someone explain the difference between a C++ exception and a structured exception in
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Can someone explain the difference between a C++ exception and a structured exception in MFC?
You actually have three mechanisms:
try/catch)__try/__except)TRY,CATCH– built on top of SEH / C++ exceptions – see also TheUndeadFish’s comment)C++ exceptions usually guarantee automatic cleanup during stack unwinding (i.e. destructors of local objects run), the other mechanisms don’t.
C++ exceptions only occur when they are explicitly thrown. Structured Exceptions may occur for many operations, e.g. due to undefined behavior, passing invalid pointers to APIs, unmounting the backing store of a memory mapped file, and many more.
MFC did introduce the exception macros to support exceptions even if compilers didn’t implement them.