Function getRestType

test/fixtures/snapshot/typescript.js:55732–55779

(source, properties, symbol)

            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false, checkMode);
        }
        function getRestType(source, properties, symbol) {
            source = filterType(source, function (t) { return !(t.flags & 98304 /* TypeFlags.Nullable */); });
            if (source.flags & 131072 /* TypeFlags.Never */) {
                return emptyObjectType;
            }
            if (source.flags & 1048576 /* TypeFlags.Union */) {
                return mapType(source, function (t) { return getRestType(t, properties, symbol); });
            }
            var omitKeyType = getUnionType(ts.map(properties, getLiteralTypeFromPropertyName));
            var spreadableProperties = [];
            var unspreadableToRestKeys = [];
            for (var _i = 0, _a = getPropertiesOfType(source); _i < _a.length; _i++) {
                var prop = _a[_i];
                var literalTypeFromProperty = getLiteralTypeFromProperty(prop, 8576 /* TypeFlags.StringOrNumberLiteralOrUnique */);
                if (!isTypeAssignableTo(literalTypeFromProperty, omitKeyType)
                    && !(ts.getDeclarationModifierFlagsFromSymbol(prop) & (8 /* ModifierFlags.Private */ | 16 /* ModifierFlags.Protected */))
                    && isSpreadableProperty(prop)) {
                    spreadableProperties.push(prop);
                }
                else {
                    unspreadableToRestKeys.push(literalTypeFromProperty);
                }
            }
            if (isGenericObjectType(source) || isGenericIndexType(omitKeyType)) {
                if (unspreadableToRestKeys.length) {
                    // If the type we're spreading from has properties that cannot
                    // be spread into the rest type (e.g. getters, methods), ensure
                    // they are explicitly omitted, as they would in the non-generic case.
                    omitKeyType = getUnionType(__spreadArray([omitKeyType], unspreadableToRestKeys, true));
                }
                if (omitKeyType.flags & 131072 /* TypeFlags.Never */) {
                    return source;
                }
                var omitTypeAlias = getGlobalOmitSymbol();
                if (!omitTypeAlias) {
                    return errorType;
                }
                return getTypeAliasInstantiation(omitTypeAlias, [source, omitKeyType]);
            }
            var members = ts.createSymbolTable();
            for (var _b = 0, spreadableProperties_1 = spreadableProperties; _b < spreadableProperties_1.length; _b++) {
                var prop = spreadableProperties_1[_b];
                members.set(prop.escapedName, getSpreadSymbol(prop, /*readonly*/ false));
            }
            var result = createAnonymousType(symbol, members, ts.emptyArray, ts.emptyArray, getIndexInfosOfType(source));
            result.objectFlags |= 4194304 /* ObjectFlags.ObjectRestType */;
            return result;
        }
        function isGenericTypeWithUndefinedConstraint(type) {
            return !!(type.flags & 465829888 /* TypeFlags.Instantiable */) && maybeTypeOfKind(getBaseConstraintOfType(type) || unknownType, 32768 /* TypeFlags.Undefined */);
        }