| title | description | ms.date | f1_keywords | helpviewer_keywords | |||
|---|---|---|---|---|---|---|---|
Warning C26450 |
Describes the causes of MSVC code analysis warning C26450 and how to fix it. |
05/11/2023 |
|
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Arithmetic overflow: 'operator' operation causes overflow at compile time. Use a wider type to store the operands (io.1)
This warning indicates that an arithmetic operation was provably lossy at compile time. It can be asserted when the operands are all compile-time constants. Currently, we check left shift, multiplication, addition, and subtraction operations for such overflows.
Warning C4307 is a similar check in the Microsoft C++ compiler.
Code analysis name: RESULT_OF_ARITHMETIC_OPERATION_PROVABLY_LOSSY
int multiply()
{
const int a = INT_MAX;
const int b = 2;
int c = a * b; // C26450 reported here
return c;
}To correct this warning, use the following code.
long long multiply()
{
const int a = INT_MAX;
const int b = 2;
long long c = static_cast<long long>(a) * b; // OK
return c;
}