Programming-Idioms

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2015-09-09, 21:27:37

2015-09-10, 18:36:04

Idiom #86 Check if integer multiplication will overflow

Write boolean function multiplyWillOverflow which takes two integers x, y and return true if (x*y) overflows.

Write boolean function multiplyWillOverflow which takes two integers x, y and return true if (x*y) overflows.

import core.checkedint;

bool multiplyWillOverflow(int x, int y)
{
    bool result;
    core.checkedint.muls(x, y, result);
    return result;
}

http://dlang.org/phobos/core_checkedint.html#.muls

http://dpaste.dzfl.pl/b9a4af2e5249

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