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More closely match previous behavior

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This commit is contained in:
Anders Hejlsberg
2021-05-23 17:03:11 -07:00
parent 86f09ae87c
commit d45806a984
1 changed files with 1 additions and 1 deletions
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src/compiler/checker.ts
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@@ -24122,7 +24122,7 @@ namespace ts {
}
function isGenericTypeWithUnionConstraint(type: Type) {
return !!(type.flags & TypeFlags.Instantiable && getBaseConstraintOrType(type).flags & TypeFlags.Union);
return !!(type.flags & TypeFlags.Instantiable && getBaseConstraintOrType(type).flags & (TypeFlags.Nullable | TypeFlags.Union));
}
function containsGenericType(type: Type): boolean {