Fix holes in IObservableVector<IInspectable> #544
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* ReplaceAll did not provide the strong exception guarantee: If not all the elements could be converted to T, the code left the vector in a partially-replaced state. Now it leaves the vector unchanged if the operation fails. (Note that vector_base::assign does not provide the strong exception guarantee if wrapping is required, so we can't quite declare victory yet.) * If the underlying vector is a vector of value types, then attempting to insert nullptr now fails with E_NOINTERFACE rather than crashing. * If the object's runtime type is not T, then IndexOf should report "not found" rather than reporting the index of the first nullptr (if T is a reference type) or crashing (if T is a value type).
oldnewthing
commented
Feb 28, 2020
Throws an exception rather than crashing.
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ReplaceAll did not provide the strong exception guarantee: If not all the elements could be converted to T, the code left the vector in a partially-replaced state. Now it leaves the vector unchanged if the operation fails. (Note that vector_base::assign does not provide the strong exception guarantee if wrapping is required, so we can't quite declare victory yet.)
If the underlying vector is a vector of value types, then attempting to insert nullptr now fails with E_NOINTERFACE rather than crashing.
If the object's runtime type is not T, then IndexOf should report "not found" rather than reporting the index of the first nullptr (if T is a reference type) or crashing (if T is a value type). This fixes issue #518.
Fixed use-after-free bug in test, where we forgot to unregister event handlers, leaving them with references to destroyed local variables.