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LibJS: Support modulo(x, y) with different types

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It's a bit annoying having to add '.0' to y given that it's an integral
number in most cases.
This turns the single template parameter T into T and U to permit that.
This commit is contained in:
Linus Groh 2021-12-21 21:22:38 +01:00
parent 1ec917aa23
commit 9c209b8079
5 changed files with 15 additions and 14 deletions
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9
Userland/Libraries/LibJS/Runtime/AbstractOperations.h
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@ -77,13 +77,14 @@ ThrowCompletionOr<T*> ordinary_create_from_constructor(GlobalObject& global_obje
}
// x modulo y, https://tc39.es/ecma262/#eqn-modulo
template<typename T>
T modulo(T x, T y)
template<typename T, typename U>
auto modulo(T x, U y) requires(IsArithmetic<T>, IsArithmetic<U>)
{
// The notation “x modulo y” (y must be finite and non-zero) computes a value k of the same sign as y (or zero) such that abs(k) < abs(y) and x - k = q × y for some integer q.
VERIFY(y != 0);
if constexpr (IsFloatingPoint<T>) {
VERIFY(isfinite(y));
if constexpr (IsFloatingPoint<T> || IsFloatingPoint<U>) {
if constexpr (IsFloatingPoint<U>)
VERIFY(isfinite(y));
return fmod(fmod(x, y) + y, y);
} else {
return ((x % y) + y) % y;