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Fix parameter list length check

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This commit is contained in:
Anders Hejlsberg 2019-12-20 14:30:34 -08:00
parent 8228888f5b
commit 273bb3e6de
1 changed files with 4 additions and 11 deletions
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15
src/compiler/checker.ts
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@ -14028,17 +14028,10 @@ namespace ts {
}
const targetCount = getParameterCount(target);
if (checkMode & SignatureCheckMode.StrictArity) {
const sourceHasRest = hasEffectiveRestParameter(source);
const targetHasRest = hasEffectiveRestParameter(target);
if (sourceHasRest && !targetHasRest || sourceHasRest === targetHasRest && getParameterCount(source) > getParameterCount(target)) {
return Ternary.False;
}
}
else {
if (!hasEffectiveRestParameter(target) && getMinArgumentCount(source) > targetCount) {
return Ternary.False;
}
const sourceHasMoreParameters = !hasEffectiveRestParameter(target) &&
(checkMode & SignatureCheckMode.StrictArity ? hasEffectiveRestParameter(source) || getParameterCount(source) > targetCount : getMinArgumentCount(source) > targetCount);
if (sourceHasMoreParameters) {
return Ternary.False;
}
if (source.typeParameters && source.typeParameters !== target.typeParameters) {