Function isValidBaseType

test/fixtures/snapshot/typescript.js:57272–57283

(type)

        }
        // A valid base type is `any`, an object type or intersection of object types.
        function isValidBaseType(type) {
            if (type.flags & 262144 /* TypeFlags.TypeParameter */) {
                var constraint = getBaseConstraintOfType(type);
                if (constraint) {
                    return isValidBaseType(constraint);
                }
            }
            // TODO: Given that we allow type parmeters here now, is this `!isGenericMappedType(type)` check really needed?
            // There's no reason a `T` should be allowed while a `Readonly<T>` should not.
            return !!(type.flags & (524288 /* TypeFlags.Object */ | 67108864 /* TypeFlags.NonPrimitive */ | 1 /* TypeFlags.Any */) && !isGenericMappedType(type) ||
                type.flags & 2097152 /* TypeFlags.Intersection */ && ts.every(type.types, isValidBaseType));
        }
        function resolveBaseTypesOfInterface(type) {
            type.resolvedBaseTypes = type.resolvedBaseTypes || ts.emptyArray;
            if (type.symbol.declarations) {