Function createTupleTargetType

test/fixtures/snapshot/typescript.js:60933–60988

(elementFlags, readonly, namedMemberDeclarations)

        // Note that the generic type created by this function has no symbol associated with it. The same
        // is true for each of the synthesized type parameters.
        function createTupleTargetType(elementFlags, readonly, namedMemberDeclarations) {
            var arity = elementFlags.length;
            var minLength = ts.countWhere(elementFlags, function (f) { return !!(f & (1 /* ElementFlags.Required */ | 8 /* ElementFlags.Variadic */)); });
            var typeParameters;
            var properties = [];
            var combinedFlags = 0;
            if (arity) {
                typeParameters = new Array(arity);
                for (var i = 0; i < arity; i++) {
                    var typeParameter = typeParameters[i] = createTypeParameter();
                    var flags = elementFlags[i];
                    combinedFlags |= flags;
                    if (!(combinedFlags & 12 /* ElementFlags.Variable */)) {
                        var property = createSymbol(4 /* SymbolFlags.Property */ | (flags & 2 /* ElementFlags.Optional */ ? 16777216 /* SymbolFlags.Optional */ : 0), "" + i, readonly ? 8 /* CheckFlags.Readonly */ : 0);
                        property.tupleLabelDeclaration = namedMemberDeclarations === null || namedMemberDeclarations === void 0 ? void 0 : namedMemberDeclarations[i];
                        property.type = typeParameter;
                        properties.push(property);
                    }
                }
            }
            var fixedLength = properties.length;
            var lengthSymbol = createSymbol(4 /* SymbolFlags.Property */, "length", readonly ? 8 /* CheckFlags.Readonly */ : 0);
            if (combinedFlags & 12 /* ElementFlags.Variable */) {
                lengthSymbol.type = numberType;
            }
            else {
                var literalTypes = [];
                for (var i = minLength; i <= arity; i++)
                    literalTypes.push(getNumberLiteralType(i));
                lengthSymbol.type = getUnionType(literalTypes);
            }
            properties.push(lengthSymbol);
            var type = createObjectType(8 /* ObjectFlags.Tuple */ | 4 /* ObjectFlags.Reference */);
            type.typeParameters = typeParameters;
            type.outerTypeParameters = undefined;
            type.localTypeParameters = typeParameters;
            type.instantiations = new ts.Map();
            type.instantiations.set(getTypeListId(type.typeParameters), type);
            type.target = type;
            type.resolvedTypeArguments = type.typeParameters;
            type.thisType = createTypeParameter();
            type.thisType.isThisType = true;
            type.thisType.constraint = type;
            type.declaredProperties = properties;
            type.declaredCallSignatures = ts.emptyArray;
            type.declaredConstructSignatures = ts.emptyArray;
            type.declaredIndexInfos = ts.emptyArray;
            type.elementFlags = elementFlags;
            type.minLength = minLength;
            type.fixedLength = fixedLength;
            type.hasRestElement = !!(combinedFlags & 12 /* ElementFlags.Variable */);
            type.combinedFlags = combinedFlags;
            type.readonly = readonly;
            type.labeledElementDeclarations = namedMemberDeclarations;
            return type;
        }
        function createNormalizedTypeReference(target, typeArguments) {
            return target.objectFlags & 8 /* ObjectFlags.Tuple */ ? createNormalizedTupleType(target, typeArguments) : createTypeReference(target, typeArguments);