Fix algorithm

microsoft · Feb 13, 2025 · 1db7745 · 1db7745
1 parent f427902
commit 1db7745
Showing 1 changed file with 8 additions and 3 deletions.
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -22914,10 +22914,15 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
             }
 
             if (source.flags & TypeFlags.TemplateLiteral && target.flags & TypeFlags.StringLike) {
-                (source as TemplateLiteralType).types = (source as TemplateLiteralType).types.flatMap(type => {
-                    return type.flags & TypeFlags.Intersection ? (type as IntersectionType).types.filter(t => t.flags & TypeFlags.Primitive) : [type]
+                const resolvedPrimitiveTypes = (source as TemplateLiteralType).types.flatMap(type => {
+                    if (type.flags & TypeFlags.Intersection && (type as IntersectionType).types.every(type => type.flags & TypeFlags.Primitive || type.flags & TypeFlags.Object)) {
+                        return (type as IntersectionType).types.filter(t => t.flags & TypeFlags.Primitive)
+                    } else {
+                        return [type]
+                    }
                 });
-                return isRelatedTo(source, target, RecursionFlags.Both, /*reportErrors*/ false);
+
+                (source as TemplateLiteralType).types = resolvedPrimitiveTypes;
             }
 
             // We limit alias variance probing to only object and conditional types since their alias behavior