Function getPropertyTypeForIndexType

test/fixtures/snapshot/typescript.js:62077–62241

(originalObjectType, objectType, indexType, fullIndexType, accessNode, accessFlags)

            return true;
        }
        function getPropertyTypeForIndexType(originalObjectType, objectType, indexType, fullIndexType, accessNode, accessFlags) {
            var _a;
            var accessExpression = accessNode && accessNode.kind === 207 /* SyntaxKind.ElementAccessExpression */ ? accessNode : undefined;
            var propName = accessNode && ts.isPrivateIdentifier(accessNode) ? undefined : getPropertyNameFromIndex(indexType, accessNode);
            if (propName !== undefined) {
                if (accessFlags & 256 /* AccessFlags.Contextual */) {
                    return getTypeOfPropertyOfContextualType(objectType, propName) || anyType;
                }
                var prop = getPropertyOfType(objectType, propName);
                if (prop) {
                    if (accessFlags & 64 /* AccessFlags.ReportDeprecated */ && accessNode && prop.declarations && isDeprecatedSymbol(prop) && isUncalledFunctionReference(accessNode, prop)) {
                        var deprecatedNode = (_a = accessExpression === null || accessExpression === void 0 ? void 0 : accessExpression.argumentExpression) !== null && _a !== void 0 ? _a : (ts.isIndexedAccessTypeNode(accessNode) ? accessNode.indexType : accessNode);
                        addDeprecatedSuggestion(deprecatedNode, prop.declarations, propName);
                    }
                    if (accessExpression) {
                        markPropertyAsReferenced(prop, accessExpression, isSelfTypeAccess(accessExpression.expression, objectType.symbol));
                        if (isAssignmentToReadonlyEntity(accessExpression, prop, ts.getAssignmentTargetKind(accessExpression))) {
                            error(accessExpression.argumentExpression, ts.Diagnostics.Cannot_assign_to_0_because_it_is_a_read_only_property, symbolToString(prop));
                            return undefined;
                        }
                        if (accessFlags & 8 /* AccessFlags.CacheSymbol */) {
                            getNodeLinks(accessNode).resolvedSymbol = prop;
                        }
                        if (isThisPropertyAccessInConstructor(accessExpression, prop)) {
                            return autoType;
                        }
                    }
                    var propType = getTypeOfSymbol(prop);
                    return accessExpression && ts.getAssignmentTargetKind(accessExpression) !== 1 /* AssignmentKind.Definite */ ?
                        getFlowTypeOfReference(accessExpression, propType) :
                        propType;
                }
                if (everyType(objectType, isTupleType) && ts.isNumericLiteralName(propName) && +propName >= 0) {
                    if (accessNode && everyType(objectType, function (t) { return !t.target.hasRestElement; }) && !(accessFlags & 16 /* AccessFlags.NoTupleBoundsCheck */)) {
                        var indexNode = getIndexNodeForAccessExpression(accessNode);
                        if (isTupleType(objectType)) {
                            error(indexNode, ts.Diagnostics.Tuple_type_0_of_length_1_has_no_element_at_index_2, typeToString(objectType), getTypeReferenceArity(objectType), ts.unescapeLeadingUnderscores(propName));
                        }
                        else {
                            error(indexNode, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.unescapeLeadingUnderscores(propName), typeToString(objectType));
                        }
                    }
                    errorIfWritingToReadonlyIndex(getIndexInfoOfType(objectType, numberType));
                    return mapType(objectType, function (t) {
                        var restType = getRestTypeOfTupleType(t) || undefinedType;
                        return accessFlags & 1 /* AccessFlags.IncludeUndefined */ ? getUnionType([restType, undefinedType]) : restType;
                    });
                }
            }
            if (!(indexType.flags & 98304 /* TypeFlags.Nullable */) && isTypeAssignableToKind(indexType, 402653316 /* TypeFlags.StringLike */ | 296 /* TypeFlags.NumberLike */ | 12288 /* TypeFlags.ESSymbolLike */)) {
                if (objectType.flags & (1 /* TypeFlags.Any */ | 131072 /* TypeFlags.Never */)) {
                    return objectType;
                }
                // If no index signature is applicable, we default to the string index signature. In effect, this means the string
                // index signature applies even when accessing with a symbol-like type.
                var indexInfo = getApplicableIndexInfo(objectType, indexType) || getIndexInfoOfType(objectType, stringType);
                if (indexInfo) {
                    if (accessFlags & 2 /* AccessFlags.NoIndexSignatures */ && indexInfo.keyType !== numberType) {