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Enum literal is assignable to enum, even inside union

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Previously, only number literals were assignable to enums inside unions.
This commit is contained in:
Nathan Shively-Sanders
2016-09-08 14:41:35 -07:00
parent 495ea0d497
commit 7482d5b77d
1 changed files with 3 additions and 1 deletions
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4
src/compiler/checker.ts
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@@ -6224,7 +6224,9 @@ namespace ts {
if (source.flags & (TypeFlags.Number | TypeFlags.NumberLiteral) &&
target.flags & TypeFlags.Union &&
forEach((target as UnionType).types, t => t.flags & TypeFlags.EnumLike)) return true;
if (source.flags & TypeFlags.NumberLiteral && target.flags & TypeFlags.EnumLiteral && (<LiteralType>source).text === (<LiteralType>target).text) return true;
if (source.flags & (TypeFlags.NumberLiteral | TypeFlags.EnumLiteral) &&
target.flags & TypeFlags.EnumLiteral &&
(<LiteralType>source).text === (<LiteralType>target).text) return true;
}
return false;
}