c26454.md

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Learn more about: Arithmetic overflow: 'operator' operation produces a negative unsigned result at compile time	Warning C26454	01/08/2017	C26454 RESULT_OF_ARITHMETIC_OPERATION_NEGATIVE_UNSIGNED	C26454

Warning C26454

Arithmetic overflow: 'operator' operation produces a negative unsigned result at compile time

Remarks

This warning indicates that the subtraction operation produces a negative result that was evaluated in an unsigned context, which can result in unintended overflows.

Code analysis name: RESULT_OF_ARITHMETIC_OPERATION_NEGATIVE_UNSIGNED

Example

unsigned int negativeunsigned()
{
    const unsigned int x = 1u - 2u; // C26454 reported here
    return x;
}

To correct this warning, use the following code:

unsigned int negativeunsigned()
{
    const unsigned int x = 4294967295; // OK
    return x;
}

See also

26450
26451
26452
26453
ES.106: Don't try to avoid negative values by using unsigned