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V202. Explicit conversion from memsize type to 32-bit integer type.
It informs about the presence of the explicit integer memsize type conversion to 32-bit type which may hide one of the following errors: V103, V107, V110. You may see the given warnings list to find out the cause of showing the warning message V202.
The V202 warning applied to conversions of pointers to 32-bit integer types before. Such conversions are rather dangerous, so we singled them out into a separate rule V205.
Keep in mind that most of the warnings of this type will be likely shown on the correct code. Here are some examples of the correct and incorrect code on which this warning will be shown.
The examples of the incorrect code.
size_t n;
...
for (unsigned i = 0; i != (unsigned)n; ++i) { //V202
...
}
UINT_PTR width, height, depth;
...
UINT arraySize = UINT(width * height * depth); //V202The examples of the correct code.
const unsigned bits =
unsigned(sizeof(object) * 8); //V202
extern size_t nPane;
extern HICON hIcon;
BOOL result =
SetIcon(static_cast<int>(nPane), hIcon); //V202Additional materials on this topic:
- 64-bit Lessons. Lesson 15. Pattern 7. Pointer packing.
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