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Polyfill: Replace checks with assertions in BalanceISODate and BalanceISOYearMonth #3233

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Polyfill: Replace checks with assertions in BalanceISODate and BalanceISOYearMonth #3233

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4 changes: 2 additions & 2 deletions polyfill/lib/ecmascript.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -2629,7 +2629,7 @@ function InternalDurationSign(duration) {
}

export function BalanceISOYearMonth(year, month) {
if (!NumberIsFinite(year) || !NumberIsFinite(month)) throw new RangeErrorCtor('infinity is out of range');
assert(NumberIsFinite(year) && NumberIsFinite(month), 'BalanceISOYearMonth: infinity is out of range');
month -= 1;
year += MathFloor(month / 12);
month %= 12;
Expand All @@ -2639,7 +2639,7 @@ export function BalanceISOYearMonth(year, month) {
}

export function BalanceISODate(year, month, day) {
if (!NumberIsFinite(day)) throw new RangeErrorCtor('infinity is out of range');
assert(NumberIsFinite(day), 'BalanceISODate: infinity is out of range');
({ year, month } = BalanceISOYearMonth(year, month));

// The pattern of leap years in the ISO 8601 calendar repeats every 400
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