Function couldContainTypeVariables

test/fixtures/snapshot/typescript.js:68142–68156

(type)

        // we perform type inference (i.e. a type parameter of a generic function). We cache
        // results for union and intersection types for performance reasons.
        function couldContainTypeVariables(type) {
            var objectFlags = ts.getObjectFlags(type);
            if (objectFlags & 524288 /* ObjectFlags.CouldContainTypeVariablesComputed */) {
                return !!(objectFlags & 1048576 /* ObjectFlags.CouldContainTypeVariables */);
            }
            var result = !!(type.flags & 465829888 /* TypeFlags.Instantiable */ ||
                type.flags & 524288 /* TypeFlags.Object */ && !isNonGenericTopLevelType(type) && (objectFlags & 4 /* ObjectFlags.Reference */ && (type.node || ts.forEach(getTypeArguments(type), couldContainTypeVariables)) ||
                    objectFlags & 16 /* ObjectFlags.Anonymous */ && type.symbol && type.symbol.flags & (16 /* SymbolFlags.Function */ | 8192 /* SymbolFlags.Method */ | 32 /* SymbolFlags.Class */ | 2048 /* SymbolFlags.TypeLiteral */ | 4096 /* SymbolFlags.ObjectLiteral */) && type.symbol.declarations ||
                    objectFlags & (32 /* ObjectFlags.Mapped */ | 1024 /* ObjectFlags.ReverseMapped */ | 4194304 /* ObjectFlags.ObjectRestType */ | 8388608 /* ObjectFlags.InstantiationExpressionType */)) ||
                type.flags & 3145728 /* TypeFlags.UnionOrIntersection */ && !(type.flags & 1024 /* TypeFlags.EnumLiteral */) && !isNonGenericTopLevelType(type) && ts.some(type.types, couldContainTypeVariables));
            if (type.flags & 3899393 /* TypeFlags.ObjectFlagsType */) {
                type.objectFlags |= 524288 /* ObjectFlags.CouldContainTypeVariablesComputed */ | (result ? 1048576 /* ObjectFlags.CouldContainTypeVariables */ : 0);
            }
            return result;
        }
        function isNonGenericTopLevelType(type) {
            if (type.aliasSymbol && !type.aliasTypeArguments) {
                var declaration = ts.getDeclarationOfKind(type.aliasSymbol, 259 /* SyntaxKind.TypeAliasDeclaration */);