Computed enum assignability is semi-structural

sandersn · sandersn · commit 267042fdc3e5 · 2016-09-13T13:34:09.000-07:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -6202,7 +6202,7 @@ namespace ts {
             }
             if (source.symbol.name !== target.symbol.name ||
                 !(source.symbol.flags & SymbolFlags.RegularEnum) || !(target.symbol.flags & SymbolFlags.RegularEnum) ||
-                !(source.flags & TypeFlags.Union) || !(target.flags & TypeFlags.Union)) {
+                (source.flags & TypeFlags.Union) !== (target.flags & TypeFlags.Union)) {
                 return (enumRelation[id] = false);
             }
             const targetEnumType = getTypeOfSymbol(target.symbol);

Original file line number	Diff line number	Diff line change
`@@ -6202,7 +6202,7 @@ namespace ts {`
`6202`	`6202`	`}`
`6203`	`6203`	`if (source.symbol.name !== target.symbol.name \|\|`
`6204`	`6204`	`!(source.symbol.flags & SymbolFlags.RegularEnum) \|\| !(target.symbol.flags & SymbolFlags.RegularEnum) \|\|`
`6205`		`- !(source.flags & TypeFlags.Union) \|\| !(target.flags & TypeFlags.Union)) {`
	`6205`	`+ (source.flags & TypeFlags.Union) !== (target.flags & TypeFlags.Union)) {`
`6206`	`6206`	`return (enumRelation[id] = false);`
`6207`	`6207`	`}`
`6208`	`6208`	`const targetEnumType = getTypeOfSymbol(target.symbol);`