/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { isForwardRef, resolveForwardRef } from '../di/forward_ref';
import { injectRootLimpMode, setInjectImplementation } from '../di/inject_switch';
import { InjectFlags } from '../di/interface/injector';
import { assertDefined, assertEqual, assertIndexInRange } from '../util/assert';
import { noSideEffects } from '../util/closure';
import { assertDirectiveDef, assertNodeInjector, assertTNodeForLView } from './assert';
import { getFactoryDef } from './definition_factory';
import { throwCyclicDependencyError, throwProviderNotFoundError } from './errors_di';
import { NG_ELEMENT_ID, NG_FACTORY_DEF } from './fields';
import { registerPreOrderHooks } from './hooks';
import { isFactory, NO_PARENT_INJECTOR } from './interfaces/injector';
import { isComponentDef, isComponentHost } from './interfaces/type_checks';
import { DECLARATION_COMPONENT_VIEW, DECLARATION_VIEW, EMBEDDED_VIEW_INJECTOR, FLAGS, INJECTOR, T_HOST, TVIEW } from './interfaces/view';
import { assertTNodeType } from './node_assert';
import { enterDI, getCurrentTNode, getLView, leaveDI } from './state';
import { isNameOnlyAttributeMarker } from './util/attrs_utils';
import { getParentInjectorIndex, getParentInjectorView, hasParentInjector } from './util/injector_utils';
import { stringifyForError } from './util/stringify_utils';
/**
 * Defines if the call to `inject` should include `viewProviders` in its resolution.
 *
 * This is set to true when we try to instantiate a component. This value is reset in
 * `getNodeInjectable` to a value which matches the declaration location of the token about to be
 * instantiated. This is done so that if we are injecting a token which was declared outside of
 * `viewProviders` we don't accidentally pull `viewProviders` in.
 *
 * Example:
 *
 * ```
 * @Injectable()
 * class MyService {
 *   constructor(public value: String) {}
 * }
 *
 * @Component({
 *   providers: [
 *     MyService,
 *     {provide: String, value: 'providers' }
 *   ]
 *   viewProviders: [
 *     {provide: String, value: 'viewProviders'}
 *   ]
 * })
 * class MyComponent {
 *   constructor(myService: MyService, value: String) {
 *     // We expect that Component can see into `viewProviders`.
 *     expect(value).toEqual('viewProviders');
 *     // `MyService` was not declared in `viewProviders` hence it can't see it.
 *     expect(myService.value).toEqual('providers');
 *   }
 * }
 *
 * ```
 */
let includeViewProviders = true;
export function setIncludeViewProviders(v) {
    const oldValue = includeViewProviders;
    includeViewProviders = v;
    return oldValue;
}
/**
 * The number of slots in each bloom filter (used by DI). The larger this number, the fewer
 * directives that will share slots, and thus, the fewer false positives when checking for
 * the existence of a directive.
 */
const BLOOM_SIZE = 256;
const BLOOM_MASK = BLOOM_SIZE - 1;
/**
 * The number of bits that is represented by a single bloom bucket. JS bit operations are 32 bits,
 * so each bucket represents 32 distinct tokens which accounts for log2(32) = 5 bits of a bloom hash
 * number.
 */
const BLOOM_BUCKET_BITS = 5;
/** Counter used to generate unique IDs for directives. */
let nextNgElementId = 0;
/** Value used when something wasn't found by an injector. */
const NOT_FOUND = {};
/**
 * Registers this directive as present in its node's injector by flipping the directive's
 * corresponding bit in the injector's bloom filter.
 *
 * @param injectorIndex The index of the node injector where this token should be registered
 * @param tView The TView for the injector's bloom filters
 * @param type The directive token to register
 */
export function bloomAdd(injectorIndex, tView, type) {
    ngDevMode && assertEqual(tView.firstCreatePass, true, 'expected firstCreatePass to be true');
    let id;
    if (typeof type === 'string') {
        id = type.charCodeAt(0) || 0;
    }
    else if (type.hasOwnProperty(NG_ELEMENT_ID)) {
        id = type[NG_ELEMENT_ID];
    }
    // Set a unique ID on the directive type, so if something tries to inject the directive,
    // we can easily retrieve the ID and hash it into the bloom bit that should be checked.
    if (id == null) {
        id = type[NG_ELEMENT_ID] = nextNgElementId++;
    }
    // We only have BLOOM_SIZE (256) slots in our bloom filter (8 buckets * 32 bits each),
    // so all unique IDs must be modulo-ed into a number from 0 - 255 to fit into the filter.
    const bloomHash = id & BLOOM_MASK;
    // Create a mask that targets the specific bit associated with the directive.
    // JS bit operations are 32 bits, so this will be a number between 2^0 and 2^31, corresponding
    // to bit positions 0 - 31 in a 32 bit integer.
    const mask = 1 << bloomHash;
    // Each bloom bucket in `tData` represents `BLOOM_BUCKET_BITS` number of bits of `bloomHash`.
    // Any bits in `bloomHash` beyond `BLOOM_BUCKET_BITS` indicate the bucket offset that the mask
    // should be written to.
    tView.data[injectorIndex + (bloomHash >> BLOOM_BUCKET_BITS)] |= mask;
}
/**
 * Creates (or gets an existing) injector for a given element or container.
 *
 * @param tNode for which an injector should be retrieved / created.
 * @param lView View where the node is stored
 * @returns Node injector
 */
export function getOrCreateNodeInjectorForNode(tNode, lView) {
    const existingInjectorIndex = getInjectorIndex(tNode, lView);
    if (existingInjectorIndex !== -1) {
        return existingInjectorIndex;
    }
    const tView = lView[TVIEW];
    if (tView.firstCreatePass) {
        tNode.injectorIndex = lView.length;
        insertBloom(tView.data, tNode); // foundation for node bloom
        insertBloom(lView, null); // foundation for cumulative bloom
        insertBloom(tView.blueprint, null);
    }
    const parentLoc = getParentInjectorLocation(tNode, lView);
    const injectorIndex = tNode.injectorIndex;
    // If a parent injector can't be found, its location is set to -1.
    // In that case, we don't need to set up a cumulative bloom
    if (hasParentInjector(parentLoc)) {
        const parentIndex = getParentInjectorIndex(parentLoc);
        const parentLView = getParentInjectorView(parentLoc, lView);
        const parentData = parentLView[TVIEW].data;
        // Creates a cumulative bloom filter that merges the parent's bloom filter
        // and its own cumulative bloom (which contains tokens for all ancestors)
        for (let i = 0; i < 8 /* NodeInjectorOffset.BLOOM_SIZE */; i++) {
            lView[injectorIndex + i] = parentLView[parentIndex + i] | parentData[parentIndex + i];
        }
    }
    lView[injectorIndex + 8 /* NodeInjectorOffset.PARENT */] = parentLoc;
    return injectorIndex;
}
function insertBloom(arr, footer) {
    arr.push(0, 0, 0, 0, 0, 0, 0, 0, footer);
}
export function getInjectorIndex(tNode, lView) {
    if (tNode.injectorIndex === -1 ||
        // If the injector index is the same as its parent's injector index, then the index has been
        // copied down from the parent node. No injector has been created yet on this node.
        (tNode.parent && tNode.parent.injectorIndex === tNode.injectorIndex) ||
        // After the first template pass, the injector index might exist but the parent values
        // might not have been calculated yet for this instance
        lView[tNode.injectorIndex + 8 /* NodeInjectorOffset.PARENT */] === null) {
        return -1;
    }
    else {
        ngDevMode && assertIndexInRange(lView, tNode.injectorIndex);
        return tNode.injectorIndex;
    }
}
/**
 * Finds the index of the parent injector, with a view offset if applicable. Used to set the
 * parent injector initially.
 *
 * @returns Returns a number that is the combination of the number of LViews that we have to go up
 * to find the LView containing the parent inject AND the index of the injector within that LView.
 */
export function getParentInjectorLocation(tNode, lView) {
    if (tNode.parent && tNode.parent.injectorIndex !== -1) {
        // If we have a parent `TNode` and there is an injector associated with it we are done, because
        // the parent injector is within the current `LView`.
        return tNode.parent.injectorIndex; // ViewOffset is 0
    }
    // When parent injector location is computed it may be outside of the current view. (ie it could
    // be pointing to a declared parent location). This variable stores number of declaration parents
    // we need to walk up in order to find the parent injector location.
    let declarationViewOffset = 0;
    let parentTNode = null;
    let lViewCursor = lView;
    // The parent injector is not in the current `LView`. We will have to walk the declared parent
    // `LView` hierarchy and look for it. If we walk of the top, that means that there is no parent
    // `NodeInjector`.
    while (lViewCursor !== null) {
        parentTNode = getTNodeFromLView(lViewCursor);
        if (parentTNode === null) {
            // If we have no parent, than we are done.
            return NO_PARENT_INJECTOR;
        }
        ngDevMode && parentTNode && assertTNodeForLView(parentTNode, lViewCursor[DECLARATION_VIEW]);
        // Every iteration of the loop requires that we go to the declared parent.
        declarationViewOffset++;
        lViewCursor = lViewCursor[DECLARATION_VIEW];
        if (parentTNode.injectorIndex !== -1) {
            // We found a NodeInjector which points to something.
            return (parentTNode.injectorIndex |
                (declarationViewOffset << 16 /* RelativeInjectorLocationFlags.ViewOffsetShift */));
        }
    }
    return NO_PARENT_INJECTOR;
}
/**
 * Makes a type or an injection token public to the DI system by adding it to an
 * injector's bloom filter.
 *
 * @param di The node injector in which a directive will be added
 * @param token The type or the injection token to be made public
 */
export function diPublicInInjector(injectorIndex, tView, token) {
    bloomAdd(injectorIndex, tView, token);
}
/**
 * Inject static attribute value into directive constructor.
 *
 * This method is used with `factory` functions which are generated as part of
 * `defineDirective` or `defineComponent`. The method retrieves the static value
 * of an attribute. (Dynamic attributes are not supported since they are not resolved
 *  at the time of injection and can change over time.)
 *
 * # Example
 * Given:
 * ```
 * @Component(...)
 * class MyComponent {
 *   constructor(@Attribute('title') title: string) { ... }
 * }
 * ```
 * When instantiated with
 * ```
 * <my-component title="Hello"></my-component>
 * ```
 *
 * Then factory method generated is:
 * ```
 * MyComponent.ɵcmp = defineComponent({
 *   factory: () => new MyComponent(injectAttribute('title'))
 *   ...
 * })
 * ```
 *
 * @publicApi
 */
export function injectAttributeImpl(tNode, attrNameToInject) {
    ngDevMode && assertTNodeType(tNode, 12 /* TNodeType.AnyContainer */ | 3 /* TNodeType.AnyRNode */);
    ngDevMode && assertDefined(tNode, 'expecting tNode');
    if (attrNameToInject === 'class') {
        return tNode.classes;
    }
    if (attrNameToInject === 'style') {
        return tNode.styles;
    }
    const attrs = tNode.attrs;
    if (attrs) {
        const attrsLength = attrs.length;
        let i = 0;
        while (i < attrsLength) {
            const value = attrs[i];
            // If we hit a `Bindings` or `Template` marker then we are done.
            if (isNameOnlyAttributeMarker(value))
                break;
            // Skip namespaced attributes
            if (value === 0 /* AttributeMarker.NamespaceURI */) {
                // we skip the next two values
                // as namespaced attributes looks like
                // [..., AttributeMarker.NamespaceURI, 'http://someuri.com/test', 'test:exist',
                // 'existValue', ...]
                i = i + 2;
            }
            else if (typeof value === 'number') {
                // Skip to the first value of the marked attribute.
                i++;
                while (i < attrsLength && typeof attrs[i] === 'string') {
                    i++;
                }
            }
            else if (value === attrNameToInject) {
                return attrs[i + 1];
            }
            else {
                i = i + 2;
            }
        }
    }
    return null;
}
function notFoundValueOrThrow(notFoundValue, token, flags) {
    if ((flags & InjectFlags.Optional) || notFoundValue !== undefined) {
        return notFoundValue;
    }
    else {
        throwProviderNotFoundError(token, 'NodeInjector');
    }
}
/**
 * Returns the value associated to the given token from the ModuleInjector or throws exception
 *
 * @param lView The `LView` that contains the `tNode`
 * @param token The token to look for
 * @param flags Injection flags
 * @param notFoundValue The value to return when the injection flags is `InjectFlags.Optional`
 * @returns the value from the injector or throws an exception
 */
function lookupTokenUsingModuleInjector(lView, token, flags, notFoundValue) {
    if ((flags & InjectFlags.Optional) && notFoundValue === undefined) {
        // This must be set or the NullInjector will throw for optional deps
        notFoundValue = null;
    }
    if ((flags & (InjectFlags.Self | InjectFlags.Host)) === 0) {
        const moduleInjector = lView[INJECTOR];
        // switch to `injectInjectorOnly` implementation for module injector, since module injector
        // should not have access to Component/Directive DI scope (that may happen through
        // `directiveInject` implementation)
        const previousInjectImplementation = setInjectImplementation(undefined);
        try {
            if (moduleInjector) {
                return moduleInjector.get(token, notFoundValue, flags & InjectFlags.Optional);
            }
            else {
                return injectRootLimpMode(token, notFoundValue, flags & InjectFlags.Optional);
            }
        }
        finally {
            setInjectImplementation(previousInjectImplementation);
        }
    }
    return notFoundValueOrThrow(notFoundValue, token, flags);
}
/**
 * Returns the value associated to the given token from the NodeInjectors => ModuleInjector.
 *
 * Look for the injector providing the token by walking up the node injector tree and then
 * the module injector tree.
 *
 * This function patches `token` with `__NG_ELEMENT_ID__` which contains the id for the bloom
 * filter. `-1` is reserved for injecting `Injector` (implemented by `NodeInjector`)
 *
 * @param tNode The Node where the search for the injector should start
 * @param lView The `LView` that contains the `tNode`
 * @param token The token to look for
 * @param flags Injection flags
 * @param notFoundValue The value to return when the injection flags is `InjectFlags.Optional`
 * @returns the value from the injector, `null` when not found, or `notFoundValue` if provided
 */
export function getOrCreateInjectable(tNode, lView, token, flags = InjectFlags.Default, notFoundValue) {
    if (tNode !== null) {
        // If the view or any of its ancestors have an embedded
        // view injector, we have to look it up there first.
        if (lView[FLAGS] & 1024 /* LViewFlags.HasEmbeddedViewInjector */) {
            const embeddedInjectorValue = lookupTokenUsingEmbeddedInjector(tNode, lView, token, flags, NOT_FOUND);
            if (embeddedInjectorValue !== NOT_FOUND) {
                return embeddedInjectorValue;
            }
        }
        // Otherwise try the node injector.
        const value = lookupTokenUsingNodeInjector(tNode, lView, token, flags, NOT_FOUND);
        if (value !== NOT_FOUND) {
            return value;
        }
    }
    // Finally, fall back to the module injector.
    return lookupTokenUsingModuleInjector(lView, token, flags, notFoundValue);
}
/**
 * Returns the value associated to the given token from the node injector.
 *
 * @param tNode The Node where the search for the injector should start
 * @param lView The `LView` that contains the `tNode`
 * @param token The token to look for
 * @param flags Injection flags
 * @param notFoundValue The value to return when the injection flags is `InjectFlags.Optional`
 * @returns the value from the injector, `null` when not found, or `notFoundValue` if provided
 */
function lookupTokenUsingNodeInjector(tNode, lView, token, flags, notFoundValue) {
    const bloomHash = bloomHashBitOrFactory(token);
    // If the ID stored here is a function, this is a special object like ElementRef or TemplateRef
    // so just call the factory function to create it.
    if (typeof bloomHash === 'function') {
        if (!enterDI(lView, tNode, flags)) {
            // Failed to enter DI, try module injector instead. If a token is injected with the @Host
            // flag, the module injector is not searched for that token in Ivy.
            return (flags & InjectFlags.Host) ?
                notFoundValueOrThrow(notFoundValue, token, flags) :
                lookupTokenUsingModuleInjector(lView, token, flags, notFoundValue);
        }
        try {
            const value = bloomHash(flags);
            if (value == null && !(flags & InjectFlags.Optional)) {
                throwProviderNotFoundError(token);
            }
            else {
                return value;
            }
        }
        finally {
            leaveDI();
        }
    }
    else if (typeof bloomHash === 'number') {
        // A reference to the previous injector TView that was found while climbing the element
        // injector tree. This is used to know if viewProviders can be accessed on the current
        // injector.
        let previousTView = null;
        let injectorIndex = getInjectorIndex(tNode, lView);
        let parentLocation = NO_PARENT_INJECTOR;
        let hostTElementNode = flags & InjectFlags.Host ? lView[DECLARATION_COMPONENT_VIEW][T_HOST] : null;
        // If we should skip this injector, or if there is no injector on this node, start by
        // searching the parent injector.
        if (injectorIndex === -1 || flags & InjectFlags.SkipSelf) {
            parentLocation = injectorIndex === -1 ? getParentInjectorLocation(tNode, lView) :
                lView[injectorIndex + 8 /* NodeInjectorOffset.PARENT */];
            if (parentLocation === NO_PARENT_INJECTOR || !shouldSearchParent(flags, false)) {
                injectorIndex = -1;
            }
            else {
                previousTView = lView[TVIEW];
                injectorIndex = getParentInjectorIndex(parentLocation);
                lView = getParentInjectorView(parentLocation, lView);
            }
        }
        // Traverse up the injector tree until we find a potential match or until we know there
        // *isn't* a match.
        while (injectorIndex !== -1) {
            ngDevMode && assertNodeInjector(lView, injectorIndex);
            // Check the current injector. If it matches, see if it contains token.
            const tView = lView[TVIEW];
            ngDevMode &&
                assertTNodeForLView(tView.data[injectorIndex + 8 /* NodeInjectorOffset.TNODE */], lView);
            if (bloomHasToken(bloomHash, injectorIndex, tView.data)) {
                // At this point, we have an injector which *may* contain the token, so we step through
                // the providers and directives associated with the injector's corresponding node to get
                // the instance.
                const instance = searchTokensOnInjector(injectorIndex, lView, token, previousTView, flags, hostTElementNode);
                if (instance !== NOT_FOUND) {
                    return instance;
                }
            }
            parentLocation = lView[injectorIndex + 8 /* NodeInjectorOffset.PARENT */];
            if (parentLocation !== NO_PARENT_INJECTOR &&
                shouldSearchParent(flags, lView[TVIEW].data[injectorIndex + 8 /* NodeInjectorOffset.TNODE */] === hostTElementNode) &&
                bloomHasToken(bloomHash, injectorIndex, lView)) {
                // The def wasn't found anywhere on this node, so it was a false positive.
                // Traverse up the tree and continue searching.
                previousTView = tView;
                injectorIndex = getParentInjectorIndex(parentLocation);
                lView = getParentInjectorView(parentLocation, lView);
            }
            else {
                // If we should not search parent OR If the ancestor bloom filter value does not have the
                // bit corresponding to the directive we can give up on traversing up to find the specific
                // injector.
                injectorIndex = -1;
            }
        }
    }
    return notFoundValue;
}
function searchTokensOnInjector(injectorIndex, lView, token, previousTView, flags, hostTElementNode) {
    const currentTView = lView[TVIEW];
    const tNode = currentTView.data[injectorIndex + 8 /* NodeInjectorOffset.TNODE */];
    // First, we need to determine if view providers can be accessed by the starting element.
    // There are two possibilities
    const canAccessViewProviders = previousTView == null ?
        // 1) This is the first invocation `previousTView == null` which means that we are at the
        // `TNode` of where injector is starting to look. In such a case the only time we are allowed
        // to look into the ViewProviders is if:
        // - we are on a component
        // - AND the injector set `includeViewProviders` to true (implying that the token can see
        // ViewProviders because it is the Component or a Service which itself was declared in
        // ViewProviders)
        (isComponentHost(tNode) && includeViewProviders) :
        // 2) `previousTView != null` which means that we are now walking across the parent nodes.
        // In such a case we are only allowed to look into the ViewProviders if:
        // - We just crossed from child View to Parent View `previousTView != currentTView`
        // - AND the parent TNode is an Element.
        // This means that we just came from the Component's View and therefore are allowed to see
        // into the ViewProviders.
        (previousTView != currentTView && ((tNode.type & 3 /* TNodeType.AnyRNode */) !== 0));
    // This special case happens when there is a @host on the inject and when we are searching
    // on the host element node.
    const isHostSpecialCase = (flags & InjectFlags.Host) && hostTElementNode === tNode;
    const injectableIdx = locateDirectiveOrProvider(tNode, currentTView, token, canAccessViewProviders, isHostSpecialCase);
    if (injectableIdx !== null) {
        return getNodeInjectable(lView, currentTView, injectableIdx, tNode);
    }
    else {
        return NOT_FOUND;
    }
}
/**
 * Searches for the given token among the node's directives and providers.
 *
 * @param tNode TNode on which directives are present.
 * @param tView The tView we are currently processing
 * @param token Provider token or type of a directive to look for.
 * @param canAccessViewProviders Whether view providers should be considered.
 * @param isHostSpecialCase Whether the host special case applies.
 * @returns Index of a found directive or provider, or null when none found.
 */
export function locateDirectiveOrProvider(tNode, tView, token, canAccessViewProviders, isHostSpecialCase) {
    const nodeProviderIndexes = tNode.providerIndexes;
    const tInjectables = tView.data;
    const injectablesStart = nodeProviderIndexes & 1048575 /* TNodeProviderIndexes.ProvidersStartIndexMask */;
    const directivesStart = tNode.directiveStart;
    const directiveEnd = tNode.directiveEnd;
    const cptViewProvidersCount = nodeProviderIndexes >> 20 /* TNodeProviderIndexes.CptViewProvidersCountShift */;
    const startingIndex = canAccessViewProviders ? injectablesStart : injectablesStart + cptViewProvidersCount;
    // When the host special case applies, only the viewProviders and the component are visible
    const endIndex = isHostSpecialCase ? injectablesStart + cptViewProvidersCount : directiveEnd;
    for (let i = startingIndex; i < endIndex; i++) {
        const providerTokenOrDef = tInjectables[i];
        if (i < directivesStart && token === providerTokenOrDef ||
            i >= directivesStart && providerTokenOrDef.type === token) {
            return i;
        }
    }
    if (isHostSpecialCase) {
        const dirDef = tInjectables[directivesStart];
        if (dirDef && isComponentDef(dirDef) && dirDef.type === token) {
            return directivesStart;
        }
    }
    return null;
}
/**
 * Retrieve or instantiate the injectable from the `LView` at particular `index`.
 *
 * This function checks to see if the value has already been instantiated and if so returns the
 * cached `injectable`. Otherwise if it detects that the value is still a factory it
 * instantiates the `injectable` and caches the value.
 */
export function getNodeInjectable(lView, tView, index, tNode) {
    let value = lView[index];
    const tData = tView.data;
    if (isFactory(value)) {
        const factory = value;
        if (factory.resolving) {
            throwCyclicDependencyError(stringifyForError(tData[index]));
        }
        const previousIncludeViewProviders = setIncludeViewProviders(factory.canSeeViewProviders);
        factory.resolving = true;
        const previousInjectImplementation = factory.injectImpl ? setInjectImplementation(factory.injectImpl) : null;
        const success = enterDI(lView, tNode, InjectFlags.Default);
        ngDevMode &&
            assertEqual(success, true, 'Because flags do not contain \`SkipSelf\' we expect this to always succeed.');
        try {
            value = lView[index] = factory.factory(undefined, tData, lView, tNode);
            // This code path is hit for both directives and providers.
            // For perf reasons, we want to avoid searching for hooks on providers.
            // It does no harm to try (the hooks just won't exist), but the extra
            // checks are unnecessary and this is a hot path. So we check to see
            // if the index of the dependency is in the directive range for this
            // tNode. If it's not, we know it's a provider and skip hook registration.
            if (tView.firstCreatePass && index >= tNode.directiveStart) {
                ngDevMode && assertDirectiveDef(tData[index]);
                registerPreOrderHooks(index, tData[index], tView);
            }
        }
        finally {
            previousInjectImplementation !== null &&
                setInjectImplementation(previousInjectImplementation);
            setIncludeViewProviders(previousIncludeViewProviders);
            factory.resolving = false;
            leaveDI();
        }
    }
    return value;
}
/**
 * Returns the bit in an injector's bloom filter that should be used to determine whether or not
 * the directive might be provided by the injector.
 *
 * When a directive is public, it is added to the bloom filter and given a unique ID that can be
 * retrieved on the Type. When the directive isn't public or the token is not a directive `null`
 * is returned as the node injector can not possibly provide that token.
 *
 * @param token the injection token
 * @returns the matching bit to check in the bloom filter or `null` if the token is not known.
 *   When the returned value is negative then it represents special values such as `Injector`.
 */
export function bloomHashBitOrFactory(token) {
    ngDevMode && assertDefined(token, 'token must be defined');
    if (typeof token === 'string') {
        return token.charCodeAt(0) || 0;
    }
    const tokenId = 
    // First check with `hasOwnProperty` so we don't get an inherited ID.
    token.hasOwnProperty(NG_ELEMENT_ID) ? token[NG_ELEMENT_ID] : undefined;
    // Negative token IDs are used for special objects such as `Injector`
    if (typeof tokenId === 'number') {
        if (tokenId >= 0) {
            return tokenId & BLOOM_MASK;
        }
        else {
            ngDevMode &&
                assertEqual(tokenId, -1 /* InjectorMarkers.Injector */, 'Expecting to get Special Injector Id');
            return createNodeInjector;
        }
    }
    else {
        return tokenId;
    }
}
export function bloomHasToken(bloomHash, injectorIndex, injectorView) {
    // Create a mask that targets the specific bit associated with the directive we're looking for.
    // JS bit operations are 32 bits, so this will be a number between 2^0 and 2^31, corresponding
    // to bit positions 0 - 31 in a 32 bit integer.
    const mask = 1 << bloomHash;
    // Each bloom bucket in `injectorView` represents `BLOOM_BUCKET_BITS` number of bits of
    // `bloomHash`. Any bits in `bloomHash` beyond `BLOOM_BUCKET_BITS` indicate the bucket offset
    // that should be used.
    const value = injectorView[injectorIndex + (bloomHash >> BLOOM_BUCKET_BITS)];
    // If the bloom filter value has the bit corresponding to the directive's bloomBit flipped on,
    // this injector is a potential match.
    return !!(value & mask);
}
/** Returns true if flags prevent parent injector from being searched for tokens */
function shouldSearchParent(flags, isFirstHostTNode) {
    return !(flags & InjectFlags.Self) && !(flags & InjectFlags.Host && isFirstHostTNode);
}
export class NodeInjector {
    constructor(_tNode, _lView) {
        this._tNode = _tNode;
        this._lView = _lView;
    }
    get(token, notFoundValue, flags) {
        return getOrCreateInjectable(this._tNode, this._lView, token, flags, notFoundValue);
    }
}
/** Creates a `NodeInjector` for the current node. */
export function createNodeInjector() {
    return new NodeInjector(getCurrentTNode(), getLView());
}
/**
 * @codeGenApi
 */
export function ɵɵgetInheritedFactory(type) {
    return noSideEffects(() => {
        const ownConstructor = type.prototype.constructor;
        const ownFactory = ownConstructor[NG_FACTORY_DEF] || getFactoryOf(ownConstructor);
        const objectPrototype = Object.prototype;
        let parent = Object.getPrototypeOf(type.prototype).constructor;
        // Go up the prototype until we hit `Object`.
        while (parent && parent !== objectPrototype) {
            const factory = parent[NG_FACTORY_DEF] || getFactoryOf(parent);
            // If we hit something that has a factory and the factory isn't the same as the type,
            // we've found the inherited factory. Note the check that the factory isn't the type's
            // own factory is redundant in most cases, but if the user has custom decorators on the
            // class, this lookup will start one level down in the prototype chain, causing us to
            // find the own factory first and potentially triggering an infinite loop downstream.
            if (factory && factory !== ownFactory) {
                return factory;
            }
            parent = Object.getPrototypeOf(parent);
        }
        // There is no factory defined. Either this was improper usage of inheritance
        // (no Angular decorator on the superclass) or there is no constructor at all
        // in the inheritance chain. Since the two cases cannot be distinguished, the
        // latter has to be assumed.
        return t => new t();
    });
}
function getFactoryOf(type) {
    if (isForwardRef(type)) {
        return () => {
            const factory = getFactoryOf(resolveForwardRef(type));
            return factory && factory();
        };
    }
    return getFactoryDef(type);
}
/**
 * Returns a value from the closest embedded or node injector.
 *
 * @param tNode The Node where the search for the injector should start
 * @param lView The `LView` that contains the `tNode`
 * @param token The token to look for
 * @param flags Injection flags
 * @param notFoundValue The value to return when the injection flags is `InjectFlags.Optional`
 * @returns the value from the injector, `null` when not found, or `notFoundValue` if provided
 */
function lookupTokenUsingEmbeddedInjector(tNode, lView, token, flags, notFoundValue) {
    let currentTNode = tNode;
    let currentLView = lView;
    // When an LView with an embedded view injector is inserted, it'll likely be interlaced with
    // nodes who may have injectors (e.g. node injector -> embedded view injector -> node injector).
    // Since the bloom filters for the node injectors have already been constructed and we don't
    // have a way of extracting the records from an injector, the only way to maintain the correct
    // hierarchy when resolving the value is to walk it node-by-node while attempting to resolve
    // the token at each level.
    while (currentTNode !== null && currentLView !== null &&
        (currentLView[FLAGS] & 1024 /* LViewFlags.HasEmbeddedViewInjector */) &&
        !(currentLView[FLAGS] & 256 /* LViewFlags.IsRoot */)) {
        ngDevMode && assertTNodeForLView(currentTNode, currentLView);
        // Note that this lookup on the node injector is using the `Self` flag, because
        // we don't want the node injector to look at any parent injectors since we
        // may hit the embedded view injector first.
        const nodeInjectorValue = lookupTokenUsingNodeInjector(currentTNode, currentLView, token, flags | InjectFlags.Self, NOT_FOUND);
        if (nodeInjectorValue !== NOT_FOUND) {
            return nodeInjectorValue;
        }
        // Has an explicit type due to a TS bug: https://github.com/microsoft/TypeScript/issues/33191
        let parentTNode = currentTNode.parent;
        // `TNode.parent` includes the parent within the current view only. If it doesn't exist,
        // it means that we've hit the view boundary and we need to go up to the next view.
        if (!parentTNode) {
            // Before we go to the next LView, check if the token exists on the current embedded injector.
            const embeddedViewInjector = currentLView[EMBEDDED_VIEW_INJECTOR];
            if (embeddedViewInjector) {
                const embeddedViewInjectorValue = embeddedViewInjector.get(token, NOT_FOUND, flags);
                if (embeddedViewInjectorValue !== NOT_FOUND) {
                    return embeddedViewInjectorValue;
                }
            }
            // Otherwise keep going up the tree.
            parentTNode = getTNodeFromLView(currentLView);
            currentLView = currentLView[DECLARATION_VIEW];
        }
        currentTNode = parentTNode;
    }
    return notFoundValue;
}
/** Gets the TNode associated with an LView inside of the declaration view. */
function getTNodeFromLView(lView) {
    const tView = lView[TVIEW];
    const tViewType = tView.type;
    // The parent pointer differs based on `TView.type`.
    if (tViewType === 2 /* TViewType.Embedded */) {
        ngDevMode && assertDefined(tView.declTNode, 'Embedded TNodes should have declaration parents.');
        return tView.declTNode;
    }
    else if (tViewType === 1 /* TViewType.Component */) {
        // Components don't have `TView.declTNode` because each instance of component could be
        // inserted in different location, hence `TView.declTNode` is meaningless.
        return lView[T_HOST];
    }
    return null;
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {isForwardRef, resolveForwardRef} from '../di/forward_ref';\nimport {injectRootLimpMode, setInjectImplementation} from '../di/inject_switch';\nimport {Injector} from '../di/injector';\nimport {InjectorMarkers} from '../di/injector_marker';\nimport {InjectFlags} from '../di/interface/injector';\nimport {ProviderToken} from '../di/provider_token';\nimport {Type} from '../interface/type';\nimport {assertDefined, assertEqual, assertIndexInRange} from '../util/assert';\nimport {noSideEffects} from '../util/closure';\n\nimport {assertDirectiveDef, assertNodeInjector, assertTNodeForLView} from './assert';\nimport {FactoryFn, getFactoryDef} from './definition_factory';\nimport {throwCyclicDependencyError, throwProviderNotFoundError} from './errors_di';\nimport {NG_ELEMENT_ID, 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This value is reset in\n * `getNodeInjectable` to a value which matches the declaration location of the token about to be\n * instantiated. 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The larger this number, the fewer\n * directives that will share slots, and thus, the fewer false positives when checking for\n * the existence of a directive.\n */\nconst BLOOM_SIZE = 256;\nconst BLOOM_MASK = BLOOM_SIZE - 1;\n\n/**\n * The number of bits that is represented by a single bloom bucket. JS bit operations are 32 bits,\n * so each bucket represents 32 distinct tokens which accounts for log2(32) = 5 bits of a bloom hash\n * number.\n */\nconst BLOOM_BUCKET_BITS = 5;\n\n/** Counter used to generate unique IDs for directives. */\nlet nextNgElementId = 0;\n\n/** Value used when something wasn't found by an injector. */\nconst NOT_FOUND = {};\n\n/**\n * Registers this directive as present in its node's injector by flipping the directive's\n * corresponding bit in the injector's bloom filter.\n *\n * @param injectorIndex The index of the node injector where this token should be registered\n * @param tView The TView for the injector's bloom filters\n * @param type The directive token to register\n */\nexport function bloomAdd(\n    injectorIndex: number, tView: TView, type: ProviderToken<any>|string): void {\n  ngDevMode && assertEqual(tView.firstCreatePass, true, 'expected firstCreatePass to be true');\n  let id: number|undefined;\n  if (typeof type === 'string') {\n    id = type.charCodeAt(0) || 0;\n  } else if (type.hasOwnProperty(NG_ELEMENT_ID)) {\n    id = (type as any)[NG_ELEMENT_ID];\n  }\n\n  // Set a unique ID on the directive type, so if something tries to inject the directive,\n  // we can easily retrieve the ID and hash it into the bloom bit that should be checked.\n  if (id == null) {\n    id = (type as any)[NG_ELEMENT_ID] = nextNgElementId++;\n  }\n\n  // We only have BLOOM_SIZE (256) slots in our bloom filter (8 buckets * 32 bits each),\n  // so all unique IDs must be modulo-ed into a number from 0 - 255 to fit into the filter.\n  const bloomHash = id & BLOOM_MASK;\n\n  // Create a mask that targets the specific bit associated with the directive.\n  // JS bit operations are 32 bits, so this will be a number between 2^0 and 2^31, corresponding\n  // to bit positions 0 - 31 in a 32 bit integer.\n  const mask = 1 << bloomHash;\n\n  // Each bloom bucket in `tData` represents `BLOOM_BUCKET_BITS` number of bits of `bloomHash`.\n  // Any bits in `bloomHash` beyond `BLOOM_BUCKET_BITS` indicate the bucket offset that the mask\n  // should be written to.\n  (tView.data as number[])[injectorIndex + (bloomHash >> BLOOM_BUCKET_BITS)] |= mask;\n}\n\n/**\n * Creates (or gets an existing) injector for a given element or container.\n *\n * @param tNode for which an injector should be retrieved / created.\n * @param lView View where the node is stored\n * @returns Node injector\n */\nexport function getOrCreateNodeInjectorForNode(\n    tNode: TElementNode|TContainerNode|TElementContainerNode, lView: LView): number {\n  const existingInjectorIndex = getInjectorIndex(tNode, lView);\n  if (existingInjectorIndex !== -1) {\n    return existingInjectorIndex;\n  }\n\n  const tView = lView[TVIEW];\n  if (tView.firstCreatePass) {\n    tNode.injectorIndex = lView.length;\n    insertBloom(tView.data, tNode);  // foundation for node bloom\n    insertBloom(lView, null);        // foundation for cumulative bloom\n    insertBloom(tView.blueprint, null);\n  }\n\n  const parentLoc = getParentInjectorLocation(tNode, lView);\n  const injectorIndex = tNode.injectorIndex;\n\n  // If a parent injector can't be found, its location is set to -1.\n  // In that case, we don't need to set up a cumulative bloom\n  if (hasParentInjector(parentLoc)) {\n    const parentIndex = getParentInjectorIndex(parentLoc);\n    const parentLView = getParentInjectorView(parentLoc, lView);\n    const parentData = parentLView[TVIEW].data as any;\n    // Creates a cumulative bloom filter that merges the parent's bloom filter\n    // and its own cumulative bloom (which contains tokens for all ancestors)\n    for (let i = 0; i < NodeInjectorOffset.BLOOM_SIZE; i++) {\n      lView[injectorIndex + i] = parentLView[parentIndex + i] | parentData[parentIndex + i];\n    }\n  }\n\n  lView[injectorIndex + NodeInjectorOffset.PARENT] = parentLoc;\n  return injectorIndex;\n}\n\nfunction insertBloom(arr: any[], footer: TNode|null): void {\n  arr.push(0, 0, 0, 0, 0, 0, 0, 0, footer);\n}\n\n\nexport function getInjectorIndex(tNode: TNode, lView: LView): number {\n  if (tNode.injectorIndex === -1 ||\n      // If the injector index is the same as its parent's injector index, then the index has been\n      // copied down from the parent node. No injector has been created yet on this node.\n      (tNode.parent && tNode.parent.injectorIndex === tNode.injectorIndex) ||\n      // After the first template pass, the injector index might exist but the parent values\n      // might not have been calculated yet for this instance\n      lView[tNode.injectorIndex + NodeInjectorOffset.PARENT] === null) {\n    return -1;\n  } else {\n    ngDevMode && assertIndexInRange(lView, tNode.injectorIndex);\n    return tNode.injectorIndex;\n  }\n}\n\n/**\n * Finds the index of the parent injector, with a view offset if applicable. Used to set the\n * parent injector initially.\n *\n * @returns Returns a number that is the combination of the number of LViews that we have to go up\n * to find the LView containing the parent inject AND the index of the injector within that LView.\n */\nexport function getParentInjectorLocation(tNode: TNode, lView: LView): RelativeInjectorLocation {\n  if (tNode.parent && tNode.parent.injectorIndex !== -1) {\n    // If we have a parent `TNode` and there is an injector associated with it we are done, because\n    // the parent injector is within the current `LView`.\n    return tNode.parent.injectorIndex as any;  // ViewOffset is 0\n  }\n\n  // When parent injector location is computed it may be outside of the current view. (ie it could\n  // be pointing to a declared parent location). This variable stores number of declaration parents\n  // we need to walk up in order to find the parent injector location.\n  let declarationViewOffset = 0;\n  let parentTNode: TNode|null = null;\n  let lViewCursor: LView|null = lView;\n\n  // The parent injector is not in the current `LView`. We will have to walk the declared parent\n  // `LView` hierarchy and look for it. If we walk of the top, that means that there is no parent\n  // `NodeInjector`.\n  while (lViewCursor !== null) {\n    parentTNode = getTNodeFromLView(lViewCursor);\n\n    if (parentTNode === null) {\n      // If we have no parent, than we are done.\n      return NO_PARENT_INJECTOR;\n    }\n\n    ngDevMode && parentTNode && assertTNodeForLView(parentTNode!, lViewCursor[DECLARATION_VIEW]!);\n    // Every iteration of the loop requires that we go to the declared parent.\n    declarationViewOffset++;\n    lViewCursor = lViewCursor[DECLARATION_VIEW];\n\n    if (parentTNode.injectorIndex !== -1) {\n      // We found a NodeInjector which points to something.\n      return (parentTNode.injectorIndex |\n              (declarationViewOffset << RelativeInjectorLocationFlags.ViewOffsetShift)) as any;\n    }\n  }\n  return NO_PARENT_INJECTOR;\n}\n/**\n * Makes a type or an injection token public to the DI system by adding it to an\n * injector's bloom filter.\n *\n * @param di The node injector in which a directive will be added\n * @param token The type or the injection token to be made public\n */\nexport function diPublicInInjector(\n    injectorIndex: number, tView: TView, token: ProviderToken<any>): void {\n  bloomAdd(injectorIndex, tView, token);\n}\n\n/**\n * Inject static attribute value into directive constructor.\n *\n * This method is used with `factory` functions which are generated as part of\n * `defineDirective` or `defineComponent`. The method retrieves the static value\n * of an attribute. (Dynamic attributes are not supported since they are not resolved\n *  at the time of injection and can change over time.)\n *\n * # Example\n * Given:\n * ```\n * @Component(...)\n * class MyComponent {\n *   constructor(@Attribute('title') title: string) { ... }\n * }\n * ```\n * When instantiated with\n * ```\n * <my-component title=\"Hello\"></my-component>\n * ```\n *\n * Then factory method generated is:\n * ```\n * MyComponent.ɵcmp = defineComponent({\n *   factory: () => new MyComponent(injectAttribute('title'))\n *   ...\n * })\n * ```\n *\n * @publicApi\n */\nexport function injectAttributeImpl(tNode: TNode, attrNameToInject: string): string|null {\n  ngDevMode && assertTNodeType(tNode, TNodeType.AnyContainer | TNodeType.AnyRNode);\n  ngDevMode && assertDefined(tNode, 'expecting tNode');\n  if (attrNameToInject === 'class') {\n    return tNode.classes;\n  }\n  if (attrNameToInject === 'style') {\n    return tNode.styles;\n  }\n\n  const attrs = tNode.attrs;\n  if (attrs) {\n    const attrsLength = attrs.length;\n    let i = 0;\n    while (i < attrsLength) {\n      const value = attrs[i];\n\n      // If we hit a `Bindings` or `Template` marker then we are done.\n      if (isNameOnlyAttributeMarker(value)) break;\n\n      // Skip namespaced attributes\n      if (value === AttributeMarker.NamespaceURI) {\n        // we skip the next two values\n        // as namespaced attributes looks like\n        // [..., AttributeMarker.NamespaceURI, 'http://someuri.com/test', 'test:exist',\n        // 'existValue', ...]\n        i = i + 2;\n      } else if (typeof value === 'number') {\n        // Skip to the first value of the marked attribute.\n        i++;\n        while (i < attrsLength && typeof attrs[i] === 'string') {\n          i++;\n        }\n      } else if (value === attrNameToInject) {\n        return attrs[i + 1] as string;\n      } else {\n        i = i + 2;\n      }\n    }\n  }\n  return null;\n}\n\n\nfunction notFoundValueOrThrow<T>(\n    notFoundValue: T|null, token: ProviderToken<T>, flags: InjectFlags): T|null {\n  if ((flags & InjectFlags.Optional) || notFoundValue !== undefined) {\n    return notFoundValue;\n  } else {\n    throwProviderNotFoundError(token, 'NodeInjector');\n  }\n}\n\n/**\n * Returns the value associated to the given token from the ModuleInjector or throws exception\n *\n * @param lView The `LView` that contains the `tNode`\n * @param token The token to look for\n * @param flags Injection flags\n * @param notFoundValue The value to return when the injection flags is `InjectFlags.Optional`\n * @returns the value from the injector or throws an exception\n */\nfunction lookupTokenUsingModuleInjector<T>(\n    lView: LView, token: ProviderToken<T>, flags: InjectFlags, notFoundValue?: any): T|null {\n  if ((flags & InjectFlags.Optional) && notFoundValue === undefined) {\n    // This must be set or the NullInjector will throw for optional deps\n    notFoundValue = null;\n  }\n\n  if ((flags & (InjectFlags.Self | InjectFlags.Host)) === 0) {\n    const moduleInjector = lView[INJECTOR];\n    // switch to `injectInjectorOnly` implementation for module injector, since module injector\n    // should not have access to Component/Directive DI scope (that may happen through\n    // `directiveInject` implementation)\n    const previousInjectImplementation = setInjectImplementation(undefined);\n    try {\n      if (moduleInjector) {\n        return moduleInjector.get(token, notFoundValue, flags & InjectFlags.Optional);\n      } else {\n        return injectRootLimpMode(token, notFoundValue, flags & InjectFlags.Optional);\n      }\n    } finally {\n      setInjectImplementation(previousInjectImplementation);\n    }\n  }\n  return notFoundValueOrThrow<T>(notFoundValue, token, flags);\n}\n\n/**\n * Returns the value associated to the given token from the NodeInjectors => ModuleInjector.\n *\n * Look for the injector providing the token by walking up the node injector tree and then\n * the module injector tree.\n *\n * This function patches `token` with `__NG_ELEMENT_ID__` which contains the id for the bloom\n * filter. `-1` is reserved for injecting `Injector` (implemented by `NodeInjector`)\n *\n * @param tNode The Node where the search for the injector should start\n * @param lView The `LView` that contains the `tNode`\n * @param token The token to look for\n * @param flags Injection flags\n * @param notFoundValue The value to return when the injection flags is `InjectFlags.Optional`\n * @returns the value from the injector, `null` when not found, or `notFoundValue` if provided\n */\nexport function getOrCreateInjectable<T>(\n    tNode: TDirectiveHostNode|null, lView: LView, token: ProviderToken<T>,\n    flags: InjectFlags = InjectFlags.Default, notFoundValue?: any): T|null {\n  if (tNode !== null) {\n    // If the view or any of its ancestors have an embedded\n    // view injector, we have to look it up there first.\n    if (lView[FLAGS] & LViewFlags.HasEmbeddedViewInjector) {\n      const embeddedInjectorValue =\n          lookupTokenUsingEmbeddedInjector(tNode, lView, token, flags, NOT_FOUND);\n      if (embeddedInjectorValue !== NOT_FOUND) {\n        return embeddedInjectorValue;\n      }\n    }\n\n    // Otherwise try the node injector.\n    const value = lookupTokenUsingNodeInjector(tNode, lView, token, flags, NOT_FOUND);\n    if (value !== NOT_FOUND) {\n      return value;\n    }\n  }\n\n  // Finally, fall back to the module injector.\n  return lookupTokenUsingModuleInjector<T>(lView, token, flags, notFoundValue);\n}\n\n/**\n * Returns the value associated to the given token from the node injector.\n *\n * @param tNode The Node where the search for the injector should start\n * @param lView The `LView` that contains the `tNode`\n * @param token The token to look for\n * @param flags Injection flags\n * @param notFoundValue The value to return when the injection flags is `InjectFlags.Optional`\n * @returns the value from the injector, `null` when not found, or `notFoundValue` if provided\n */\nfunction lookupTokenUsingNodeInjector<T>(\n    tNode: TDirectiveHostNode, lView: LView, token: ProviderToken<T>, flags: InjectFlags,\n    notFoundValue?: any) {\n  const bloomHash = bloomHashBitOrFactory(token);\n  // If the ID stored here is a function, this is a special object like ElementRef or TemplateRef\n  // so just call the factory function to create it.\n  if (typeof bloomHash === 'function') {\n    if (!enterDI(lView, tNode, flags)) {\n      // Failed to enter DI, try module injector instead. If a token is injected with the @Host\n      // flag, the module injector is not searched for that token in Ivy.\n      return (flags & InjectFlags.Host) ?\n          notFoundValueOrThrow<T>(notFoundValue, token, flags) :\n          lookupTokenUsingModuleInjector<T>(lView, token, flags, notFoundValue);\n    }\n    try {\n      const value = bloomHash(flags);\n      if (value == null && !(flags & InjectFlags.Optional)) {\n        throwProviderNotFoundError(token);\n      } else {\n        return value;\n      }\n    } finally {\n      leaveDI();\n    }\n  } else if (typeof bloomHash === 'number') {\n    // A reference to the previous injector TView that was found while climbing the element\n    // injector tree. This is used to know if viewProviders can be accessed on the current\n    // injector.\n    let previousTView: TView|null = null;\n    let injectorIndex = getInjectorIndex(tNode, lView);\n    let parentLocation: RelativeInjectorLocation = NO_PARENT_INJECTOR;\n    let hostTElementNode: TNode|null =\n        flags & InjectFlags.Host ? lView[DECLARATION_COMPONENT_VIEW][T_HOST] : null;\n\n    // If we should skip this injector, or if there is no injector on this node, start by\n    // searching the parent injector.\n    if (injectorIndex === -1 || flags & InjectFlags.SkipSelf) {\n      parentLocation = injectorIndex === -1 ? getParentInjectorLocation(tNode, lView) :\n                                              lView[injectorIndex + NodeInjectorOffset.PARENT];\n\n      if (parentLocation === NO_PARENT_INJECTOR || !shouldSearchParent(flags, false)) {\n        injectorIndex = -1;\n      } else {\n        previousTView = lView[TVIEW];\n        injectorIndex = getParentInjectorIndex(parentLocation);\n        lView = getParentInjectorView(parentLocation, lView);\n      }\n    }\n\n    // Traverse up the injector tree until we find a potential match or until we know there\n    // *isn't* a match.\n    while (injectorIndex !== -1) {\n      ngDevMode && assertNodeInjector(lView, injectorIndex);\n\n      // Check the current injector. If it matches, see if it contains token.\n      const tView = lView[TVIEW];\n      ngDevMode &&\n          assertTNodeForLView(tView.data[injectorIndex + NodeInjectorOffset.TNODE] as TNode, lView);\n      if (bloomHasToken(bloomHash, injectorIndex, tView.data)) {\n        // At this point, we have an injector which *may* contain the token, so we step through\n        // the providers and directives associated with the injector's corresponding node to get\n        // the instance.\n        const instance: T|{}|null = searchTokensOnInjector<T>(\n            injectorIndex, lView, token, previousTView, flags, hostTElementNode);\n        if (instance !== NOT_FOUND) {\n          return instance;\n        }\n      }\n      parentLocation = lView[injectorIndex + NodeInjectorOffset.PARENT];\n      if (parentLocation !== NO_PARENT_INJECTOR &&\n          shouldSearchParent(\n              flags,\n              lView[TVIEW].data[injectorIndex + NodeInjectorOffset.TNODE] === hostTElementNode) &&\n          bloomHasToken(bloomHash, injectorIndex, lView)) {\n        // The def wasn't found anywhere on this node, so it was a false positive.\n        // Traverse up the tree and continue searching.\n        previousTView = tView;\n        injectorIndex = getParentInjectorIndex(parentLocation);\n        lView = getParentInjectorView(parentLocation, lView);\n      } else {\n        // If we should not search parent OR If the ancestor bloom filter value does not have the\n        // bit corresponding to the directive we can give up on traversing up to find the specific\n        // injector.\n        injectorIndex = -1;\n      }\n    }\n  }\n\n  return notFoundValue;\n}\n\nfunction searchTokensOnInjector<T>(\n    injectorIndex: number, lView: LView, token: ProviderToken<T>, previousTView: TView|null,\n    flags: InjectFlags, hostTElementNode: TNode|null) {\n  const currentTView = lView[TVIEW];\n  const tNode = currentTView.data[injectorIndex + NodeInjectorOffset.TNODE] as TNode;\n  // First, we need to determine if view providers can be accessed by the starting element.\n  // There are two possibilities\n  const canAccessViewProviders = previousTView == null ?\n      // 1) This is the first invocation `previousTView == null` which means that we are at the\n      // `TNode` of where injector is starting to look. In such a case the only time we are allowed\n      // to look into the ViewProviders is if:\n      // - we are on a component\n      // - AND the injector set `includeViewProviders` to true (implying that the token can see\n      // ViewProviders because it is the Component or a Service which itself was declared in\n      // ViewProviders)\n      (isComponentHost(tNode) && includeViewProviders) :\n      // 2) `previousTView != null` which means that we are now walking across the parent nodes.\n      // In such a case we are only allowed to look into the ViewProviders if:\n      // - We just crossed from child View to Parent View `previousTView != currentTView`\n      // - AND the parent TNode is an Element.\n      // This means that we just came from the Component's View and therefore are allowed to see\n      // into the ViewProviders.\n      (previousTView != currentTView && ((tNode.type & TNodeType.AnyRNode) !== 0));\n\n  // This special case happens when there is a @host on the inject and when we are searching\n  // on the host element node.\n  const isHostSpecialCase = (flags & InjectFlags.Host) && hostTElementNode === tNode;\n\n  const injectableIdx = locateDirectiveOrProvider(\n      tNode, currentTView, token, canAccessViewProviders, isHostSpecialCase);\n  if (injectableIdx !== null) {\n    return getNodeInjectable(lView, currentTView, injectableIdx, tNode as TElementNode);\n  } else {\n    return NOT_FOUND;\n  }\n}\n\n/**\n * Searches for the given token among the node's directives and providers.\n *\n * @param tNode TNode on which directives are present.\n * @param tView The tView we are currently processing\n * @param token Provider token or type of a directive to look for.\n * @param canAccessViewProviders Whether view providers should be considered.\n * @param isHostSpecialCase Whether the host special case applies.\n * @returns Index of a found directive or provider, or null when none found.\n */\nexport function locateDirectiveOrProvider<T>(\n    tNode: TNode, tView: TView, token: ProviderToken<T>|string, canAccessViewProviders: boolean,\n    isHostSpecialCase: boolean|number): number|null {\n  const nodeProviderIndexes = tNode.providerIndexes;\n  const tInjectables = tView.data;\n\n  const injectablesStart = nodeProviderIndexes & TNodeProviderIndexes.ProvidersStartIndexMask;\n  const directivesStart = tNode.directiveStart;\n  const directiveEnd = tNode.directiveEnd;\n  const cptViewProvidersCount =\n      nodeProviderIndexes >> TNodeProviderIndexes.CptViewProvidersCountShift;\n  const startingIndex =\n      canAccessViewProviders ? injectablesStart : injectablesStart + cptViewProvidersCount;\n  // When the host special case applies, only the viewProviders and the component are visible\n  const endIndex = isHostSpecialCase ? injectablesStart + cptViewProvidersCount : directiveEnd;\n  for (let i = startingIndex; i < endIndex; i++) {\n    const providerTokenOrDef = tInjectables[i] as ProviderToken<any>| DirectiveDef<any>| string;\n    if (i < directivesStart && token === providerTokenOrDef ||\n        i >= directivesStart && (providerTokenOrDef as DirectiveDef<any>).type === token) {\n      return i;\n    }\n  }\n  if (isHostSpecialCase) {\n    const dirDef = tInjectables[directivesStart] as DirectiveDef<any>;\n    if (dirDef && isComponentDef(dirDef) && dirDef.type === token) {\n      return directivesStart;\n    }\n  }\n  return null;\n}\n\n/**\n * Retrieve or instantiate the injectable from the `LView` at particular `index`.\n *\n * This function checks to see if the value has already been instantiated and if so returns the\n * cached `injectable`. Otherwise if it detects that the value is still a factory it\n * instantiates the `injectable` and caches the value.\n */\nexport function getNodeInjectable(\n    lView: LView, tView: TView, index: number, tNode: TDirectiveHostNode): any {\n  let value = lView[index];\n  const tData = tView.data;\n  if (isFactory(value)) {\n    const factory: NodeInjectorFactory = value;\n    if (factory.resolving) {\n      throwCyclicDependencyError(stringifyForError(tData[index]));\n    }\n    const previousIncludeViewProviders = setIncludeViewProviders(factory.canSeeViewProviders);\n    factory.resolving = true;\n    const previousInjectImplementation =\n        factory.injectImpl ? setInjectImplementation(factory.injectImpl) : null;\n    const success = enterDI(lView, tNode, InjectFlags.Default);\n    ngDevMode &&\n        assertEqual(\n            success, true,\n            'Because flags do not contain \\`SkipSelf\\' we expect this to always succeed.');\n    try {\n      value = lView[index] = factory.factory(undefined, tData, lView, tNode);\n      // This code path is hit for both directives and providers.\n      // For perf reasons, we want to avoid searching for hooks on providers.\n      // It does no harm to try (the hooks just won't exist), but the extra\n      // checks are unnecessary and this is a hot path. So we check to see\n      // if the index of the dependency is in the directive range for this\n      // tNode. If it's not, we know it's a provider and skip hook registration.\n      if (tView.firstCreatePass && index >= tNode.directiveStart) {\n        ngDevMode && assertDirectiveDef(tData[index]);\n        registerPreOrderHooks(index, tData[index] as DirectiveDef<any>, tView);\n      }\n    } finally {\n      previousInjectImplementation !== null &&\n          setInjectImplementation(previousInjectImplementation);\n      setIncludeViewProviders(previousIncludeViewProviders);\n      factory.resolving = false;\n      leaveDI();\n    }\n  }\n  return value;\n}\n\n/**\n * Returns the bit in an injector's bloom filter that should be used to determine whether or not\n * the directive might be provided by the injector.\n *\n * When a directive is public, it is added to the bloom filter and given a unique ID that can be\n * retrieved on the Type. When the directive isn't public or the token is not a directive `null`\n * is returned as the node injector can not possibly provide that token.\n *\n * @param token the injection token\n * @returns the matching bit to check in the bloom filter or `null` if the token is not known.\n *   When the returned value is negative then it represents special values such as `Injector`.\n */\nexport function bloomHashBitOrFactory(token: ProviderToken<any>|string): number|Function|undefined {\n  ngDevMode && assertDefined(token, 'token must be defined');\n  if (typeof token === 'string') {\n    return token.charCodeAt(0) || 0;\n  }\n  const tokenId: number|undefined =\n      // First check with `hasOwnProperty` so we don't get an inherited ID.\n      token.hasOwnProperty(NG_ELEMENT_ID) ? (token as any)[NG_ELEMENT_ID] : undefined;\n  // Negative token IDs are used for special objects such as `Injector`\n  if (typeof tokenId === 'number') {\n    if (tokenId >= 0) {\n      return tokenId & BLOOM_MASK;\n    } else {\n      ngDevMode &&\n          assertEqual(tokenId, InjectorMarkers.Injector, 'Expecting to get Special Injector Id');\n      return createNodeInjector;\n    }\n  } else {\n    return tokenId;\n  }\n}\n\nexport function bloomHasToken(bloomHash: number, injectorIndex: number, injectorView: LView|TData) {\n  // Create a mask that targets the specific bit associated with the directive we're looking for.\n  // JS bit operations are 32 bits, so this will be a number between 2^0 and 2^31, corresponding\n  // to bit positions 0 - 31 in a 32 bit integer.\n  const mask = 1 << bloomHash;\n\n  // Each bloom bucket in `injectorView` represents `BLOOM_BUCKET_BITS` number of bits of\n  // `bloomHash`. Any bits in `bloomHash` beyond `BLOOM_BUCKET_BITS` indicate the bucket offset\n  // that should be used.\n  const value = injectorView[injectorIndex + (bloomHash >> BLOOM_BUCKET_BITS)];\n\n  // If the bloom filter value has the bit corresponding to the directive's bloomBit flipped on,\n  // this injector is a potential match.\n  return !!(value & mask);\n}\n\n/** Returns true if flags prevent parent injector from being searched for tokens */\nfunction shouldSearchParent(flags: InjectFlags, isFirstHostTNode: boolean): boolean|number {\n  return !(flags & InjectFlags.Self) && !(flags & InjectFlags.Host && isFirstHostTNode);\n}\n\nexport class NodeInjector implements Injector {\n  constructor(\n      private _tNode: TElementNode|TContainerNode|TElementContainerNode|null,\n      private _lView: LView) {}\n\n  get(token: any, notFoundValue?: any, flags?: InjectFlags): any {\n    return getOrCreateInjectable(this._tNode, this._lView, token, flags, notFoundValue);\n  }\n}\n\n/** Creates a `NodeInjector` for the current node. */\nexport function createNodeInjector(): Injector {\n  return new NodeInjector(getCurrentTNode()! as TDirectiveHostNode, getLView()) as any;\n}\n\n/**\n * @codeGenApi\n */\nexport function ɵɵgetInheritedFactory<T>(type: Type<any>): (type: Type<T>) => T {\n  return noSideEffects(() => {\n    const ownConstructor = type.prototype.constructor;\n    const ownFactory = ownConstructor[NG_FACTORY_DEF] || getFactoryOf(ownConstructor);\n    const objectPrototype = Object.prototype;\n    let parent = Object.getPrototypeOf(type.prototype).constructor;\n\n    // Go up the prototype until we hit `Object`.\n    while (parent && parent !== objectPrototype) {\n      const factory = parent[NG_FACTORY_DEF] || getFactoryOf(parent);\n\n      // If we hit something that has a factory and the factory isn't the same as the type,\n      // we've found the inherited factory. Note the check that the factory isn't the type's\n      // own factory is redundant in most cases, but if the user has custom decorators on the\n      // class, this lookup will start one level down in the prototype chain, causing us to\n      // find the own factory first and potentially triggering an infinite loop downstream.\n      if (factory && factory !== ownFactory) {\n        return factory;\n      }\n\n      parent = Object.getPrototypeOf(parent);\n    }\n\n    // There is no factory defined. Either this was improper usage of inheritance\n    // (no Angular decorator on the superclass) or there is no constructor at all\n    // in the inheritance chain. Since the two cases cannot be distinguished, the\n    // latter has to be assumed.\n    return t => new t();\n  });\n}\n\nfunction getFactoryOf<T>(type: Type<any>): ((type?: Type<T>) => T | null)|null {\n  if (isForwardRef(type)) {\n    return () => {\n      const factory = getFactoryOf<T>(resolveForwardRef(type));\n      return factory && factory();\n    };\n  }\n  return getFactoryDef<T>(type);\n}\n\n/**\n * Returns a value from the closest embedded or node injector.\n *\n * @param tNode The Node where the search for the injector should start\n * @param lView The `LView` that contains the `tNode`\n * @param token The token to look for\n * @param flags Injection flags\n * @param notFoundValue The value to return when the injection flags is `InjectFlags.Optional`\n * @returns the value from the injector, `null` when not found, or `notFoundValue` if provided\n */\nfunction lookupTokenUsingEmbeddedInjector<T>(\n    tNode: TDirectiveHostNode, lView: LView, token: ProviderToken<T>, flags: InjectFlags,\n    notFoundValue?: any) {\n  let currentTNode: TDirectiveHostNode|null = tNode;\n  let currentLView: LView|null = lView;\n\n  // When an LView with an embedded view injector is inserted, it'll likely be interlaced with\n  // nodes who may have injectors (e.g. node injector -> embedded view injector -> node injector).\n  // Since the bloom filters for the node injectors have already been constructed and we don't\n  // have a way of extracting the records from an injector, the only way to maintain the correct\n  // hierarchy when resolving the value is to walk it node-by-node while attempting to resolve\n  // the token at each level.\n  while (currentTNode !== null && currentLView !== null &&\n         (currentLView[FLAGS] & LViewFlags.HasEmbeddedViewInjector) &&\n         !(currentLView[FLAGS] & LViewFlags.IsRoot)) {\n    ngDevMode && assertTNodeForLView(currentTNode, currentLView);\n\n    // Note that this lookup on the node injector is using the `Self` flag, because\n    // we don't want the node injector to look at any parent injectors since we\n    // may hit the embedded view injector first.\n    const nodeInjectorValue = lookupTokenUsingNodeInjector(\n        currentTNode, currentLView, token, flags | InjectFlags.Self, NOT_FOUND);\n    if (nodeInjectorValue !== NOT_FOUND) {\n      return nodeInjectorValue;\n    }\n\n    // Has an explicit type due to a TS bug: https://github.com/microsoft/TypeScript/issues/33191\n    let parentTNode: TElementNode|TContainerNode|null = currentTNode.parent;\n\n    // `TNode.parent` includes the parent within the current view only. If it doesn't exist,\n    // it means that we've hit the view boundary and we need to go up to the next view.\n    if (!parentTNode) {\n      // Before we go to the next LView, check if the token exists on the current embedded injector.\n      const embeddedViewInjector = currentLView[EMBEDDED_VIEW_INJECTOR];\n      if (embeddedViewInjector) {\n        const embeddedViewInjectorValue =\n            embeddedViewInjector.get(token, NOT_FOUND as T | {}, flags);\n        if (embeddedViewInjectorValue !== NOT_FOUND) {\n          return embeddedViewInjectorValue;\n        }\n      }\n\n      // Otherwise keep going up the tree.\n      parentTNode = getTNodeFromLView(currentLView);\n      currentLView = currentLView[DECLARATION_VIEW];\n    }\n\n    currentTNode = parentTNode;\n  }\n\n  return notFoundValue;\n}\n\n/** Gets the TNode associated with an LView inside of the declaration view. */\nfunction getTNodeFromLView(lView: LView): TElementNode|TElementContainerNode|null {\n  const tView = lView[TVIEW];\n  const tViewType = tView.type;\n\n  // The parent pointer differs based on `TView.type`.\n  if (tViewType === TViewType.Embedded) {\n    ngDevMode && assertDefined(tView.declTNode, 'Embedded TNodes should have declaration parents.');\n    return tView.declTNode as TElementContainerNode;\n  } else if (tViewType === TViewType.Component) {\n    // Components don't have `TView.declTNode` because each instance of component could be\n    // inserted in different location, hence `TView.declTNode` is meaningless.\n    return lView[T_HOST] as TElementNode;\n  }\n\n  return null;\n}\n"]}