@angular/core
Version:
Angular - the core framework
352 lines • 47.6 kB
JavaScript
/**
* @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 { assertDataInRange } from '../util/assert';
import { bindingUpdated, bindingUpdated2, bindingUpdated3, bindingUpdated4, getBinding, updateBinding } from './bindings';
import { getBindingRoot, getLView } from './state';
import { NO_CHANGE } from './tokens';
/**
* Bindings for pure functions are stored after regular bindings.
*
* |-------decls------|---------vars---------| |----- hostVars (dir1) ------|
* ------------------------------------------------------------------------------------------
* | nodes/refs/pipes | bindings | fn slots | injector | dir1 | host bindings | host slots |
* ------------------------------------------------------------------------------------------
* ^ ^
* TView.bindingStartIndex TView.expandoStartIndex
*
* Pure function instructions are given an offset from the binding root. Adding the offset to the
* binding root gives the first index where the bindings are stored. In component views, the binding
* root is the bindingStartIndex. In host bindings, the binding root is the expandoStartIndex +
* any directive instances + any hostVars in directives evaluated before it.
*
* See VIEW_DATA.md for more information about host binding resolution.
*/
/**
* If the value hasn't been saved, calls the pure function to store and return the
* value. If it has been saved, returns the saved value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn Function that returns a value
* @param thisArg Optional calling context of pureFn
* @returns value
*
* @codeGenApi
*/
export function ɵɵpureFunction0(slotOffset, pureFn, thisArg) {
const bindingIndex = getBindingRoot() + slotOffset;
const lView = getLView();
return lView[bindingIndex] === NO_CHANGE ?
updateBinding(lView, bindingIndex, thisArg ? pureFn.call(thisArg) : pureFn()) :
getBinding(lView, bindingIndex);
}
/**
* If the value of the provided exp has changed, calls the pure function to return
* an updated value. Or if the value has not changed, returns cached value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn Function that returns an updated value
* @param exp Updated expression value
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
* @codeGenApi
*/
export function ɵɵpureFunction1(slotOffset, pureFn, exp, thisArg) {
return pureFunction1Internal(getLView(), getBindingRoot(), slotOffset, pureFn, exp, thisArg);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
* @codeGenApi
*/
export function ɵɵpureFunction2(slotOffset, pureFn, exp1, exp2, thisArg) {
return pureFunction2Internal(getLView(), getBindingRoot(), slotOffset, pureFn, exp1, exp2, thisArg);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param exp3
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
* @codeGenApi
*/
export function ɵɵpureFunction3(slotOffset, pureFn, exp1, exp2, exp3, thisArg) {
return pureFunction3Internal(getLView(), getBindingRoot(), slotOffset, pureFn, exp1, exp2, exp3, thisArg);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param exp3
* @param exp4
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
* @codeGenApi
*/
export function ɵɵpureFunction4(slotOffset, pureFn, exp1, exp2, exp3, exp4, thisArg) {
return pureFunction4Internal(getLView(), getBindingRoot(), slotOffset, pureFn, exp1, exp2, exp3, exp4, thisArg);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param exp3
* @param exp4
* @param exp5
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
* @codeGenApi
*/
export function ɵɵpureFunction5(slotOffset, pureFn, exp1, exp2, exp3, exp4, exp5, thisArg) {
const bindingIndex = getBindingRoot() + slotOffset;
const lView = getLView();
const different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);
return bindingUpdated(lView, bindingIndex + 4, exp5) || different ?
updateBinding(lView, bindingIndex + 5, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5) :
pureFn(exp1, exp2, exp3, exp4, exp5)) :
getBinding(lView, bindingIndex + 5);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param exp3
* @param exp4
* @param exp5
* @param exp6
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
* @codeGenApi
*/
export function ɵɵpureFunction6(slotOffset, pureFn, exp1, exp2, exp3, exp4, exp5, exp6, thisArg) {
const bindingIndex = getBindingRoot() + slotOffset;
const lView = getLView();
const different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);
return bindingUpdated2(lView, bindingIndex + 4, exp5, exp6) || different ?
updateBinding(lView, bindingIndex + 6, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5, exp6) :
pureFn(exp1, exp2, exp3, exp4, exp5, exp6)) :
getBinding(lView, bindingIndex + 6);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param exp3
* @param exp4
* @param exp5
* @param exp6
* @param exp7
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
* @codeGenApi
*/
export function ɵɵpureFunction7(slotOffset, pureFn, exp1, exp2, exp3, exp4, exp5, exp6, exp7, thisArg) {
const bindingIndex = getBindingRoot() + slotOffset;
const lView = getLView();
let different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);
return bindingUpdated3(lView, bindingIndex + 4, exp5, exp6, exp7) || different ?
updateBinding(lView, bindingIndex + 7, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5, exp6, exp7) :
pureFn(exp1, exp2, exp3, exp4, exp5, exp6, exp7)) :
getBinding(lView, bindingIndex + 7);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param exp3
* @param exp4
* @param exp5
* @param exp6
* @param exp7
* @param exp8
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
* @codeGenApi
*/
export function ɵɵpureFunction8(slotOffset, pureFn, exp1, exp2, exp3, exp4, exp5, exp6, exp7, exp8, thisArg) {
const bindingIndex = getBindingRoot() + slotOffset;
const lView = getLView();
const different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);
return bindingUpdated4(lView, bindingIndex + 4, exp5, exp6, exp7, exp8) || different ?
updateBinding(lView, bindingIndex + 8, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5, exp6, exp7, exp8) :
pureFn(exp1, exp2, exp3, exp4, exp5, exp6, exp7, exp8)) :
getBinding(lView, bindingIndex + 8);
}
/**
* pureFunction instruction that can support any number of bindings.
*
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn A pure function that takes binding values and builds an object or array
* containing those values.
* @param exps An array of binding values
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
* @codeGenApi
*/
export function ɵɵpureFunctionV(slotOffset, pureFn, exps, thisArg) {
return pureFunctionVInternal(getLView(), getBindingRoot(), slotOffset, pureFn, exps, thisArg);
}
/**
* Results of a pure function invocation are stored in LView in a dedicated slot that is initialized
* to NO_CHANGE. In rare situations a pure pipe might throw an exception on the very first
* invocation and not produce any valid results. In this case LView would keep holding the NO_CHANGE
* value. The NO_CHANGE is not something that we can use in expressions / bindings thus we convert
* it to `undefined`.
*/
function getPureFunctionReturnValue(lView, returnValueIndex) {
ngDevMode && assertDataInRange(lView, returnValueIndex);
const lastReturnValue = lView[returnValueIndex];
return lastReturnValue === NO_CHANGE ? undefined : lastReturnValue;
}
/**
* If the value of the provided exp has changed, calls the pure function to return
* an updated value. Or if the value has not changed, returns cached value.
*
* @param lView LView in which the function is being executed.
* @param bindingRoot Binding root index.
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn Function that returns an updated value
* @param exp Updated expression value
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*/
export function pureFunction1Internal(lView, bindingRoot, slotOffset, pureFn, exp, thisArg) {
const bindingIndex = bindingRoot + slotOffset;
return bindingUpdated(lView, bindingIndex, exp) ?
updateBinding(lView, bindingIndex + 1, thisArg ? pureFn.call(thisArg, exp) : pureFn(exp)) :
getPureFunctionReturnValue(lView, bindingIndex + 1);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param lView LView in which the function is being executed.
* @param bindingRoot Binding root index.
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*/
export function pureFunction2Internal(lView, bindingRoot, slotOffset, pureFn, exp1, exp2, thisArg) {
const bindingIndex = bindingRoot + slotOffset;
return bindingUpdated2(lView, bindingIndex, exp1, exp2) ?
updateBinding(lView, bindingIndex + 2, thisArg ? pureFn.call(thisArg, exp1, exp2) : pureFn(exp1, exp2)) :
getPureFunctionReturnValue(lView, bindingIndex + 2);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param lView LView in which the function is being executed.
* @param bindingRoot Binding root index.
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param exp3
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*/
export function pureFunction3Internal(lView, bindingRoot, slotOffset, pureFn, exp1, exp2, exp3, thisArg) {
const bindingIndex = bindingRoot + slotOffset;
return bindingUpdated3(lView, bindingIndex, exp1, exp2, exp3) ?
updateBinding(lView, bindingIndex + 3, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3) : pureFn(exp1, exp2, exp3)) :
getPureFunctionReturnValue(lView, bindingIndex + 3);
}
/**
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param lView LView in which the function is being executed.
* @param bindingRoot Binding root index.
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn
* @param exp1
* @param exp2
* @param exp3
* @param exp4
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*
*/
export function pureFunction4Internal(lView, bindingRoot, slotOffset, pureFn, exp1, exp2, exp3, exp4, thisArg) {
const bindingIndex = bindingRoot + slotOffset;
return bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4) ?
updateBinding(lView, bindingIndex + 4, thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4) : pureFn(exp1, exp2, exp3, exp4)) :
getPureFunctionReturnValue(lView, bindingIndex + 4);
}
/**
* pureFunction instruction that can support any number of bindings.
*
* If the value of any provided exp has changed, calls the pure function to return
* an updated value. Or if no values have changed, returns cached value.
*
* @param lView LView in which the function is being executed.
* @param bindingRoot Binding root index.
* @param slotOffset the offset from binding root to the reserved slot
* @param pureFn A pure function that takes binding values and builds an object or array
* containing those values.
* @param exps An array of binding values
* @param thisArg Optional calling context of pureFn
* @returns Updated or cached value
*/
export function pureFunctionVInternal(lView, bindingRoot, slotOffset, pureFn, exps, thisArg) {
let bindingIndex = bindingRoot + slotOffset;
let different = false;
for (let i = 0; i < exps.length; i++) {
bindingUpdated(lView, bindingIndex++, exps[i]) && (different = true);
}
return different ? updateBinding(lView, bindingIndex, pureFn.apply(thisArg, exps)) :
getPureFunctionReturnValue(lView, bindingIndex);
}
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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 {assertDataInRange} from '../util/assert';\nimport {bindingUpdated, bindingUpdated2, bindingUpdated3, bindingUpdated4, getBinding, updateBinding} from './bindings';\nimport {LView} from './interfaces/view';\nimport {getBindingRoot, getLView} from './state';\nimport {NO_CHANGE} from './tokens';\n\n\n/**\n * Bindings for pure functions are stored after regular bindings.\n *\n * |-------decls------|---------vars---------|                 |----- hostVars (dir1) ------|\n * ------------------------------------------------------------------------------------------\n * | nodes/refs/pipes | bindings | fn slots  | injector | dir1 | host bindings | host slots |\n * ------------------------------------------------------------------------------------------\n *                    ^                      ^\n *      TView.bindingStartIndex      TView.expandoStartIndex\n *\n * Pure function instructions are given an offset from the binding root. Adding the offset to the\n * binding root gives the first index where the bindings are stored. In component views, the binding\n * root is the bindingStartIndex. In host bindings, the binding root is the expandoStartIndex +\n * any directive instances + any hostVars in directives evaluated before it.\n *\n * See VIEW_DATA.md for more information about host binding resolution.\n */\n\n/**\n * If the value hasn't been saved, calls the pure function to store and return the\n * value. If it has been saved, returns the saved value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn Function that returns a value\n * @param thisArg Optional calling context of pureFn\n * @returns value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunction0<T>(slotOffset: number, pureFn: () => T, thisArg?: any): T {\n  const bindingIndex = getBindingRoot() + slotOffset;\n  const lView = getLView();\n  return lView[bindingIndex] === NO_CHANGE ?\n      updateBinding(lView, bindingIndex, thisArg ? pureFn.call(thisArg) : pureFn()) :\n      getBinding(lView, bindingIndex);\n}\n\n/**\n * If the value of the provided exp has changed, calls the pure function to return\n * an updated value. Or if the value has not changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn Function that returns an updated value\n * @param exp Updated expression value\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunction1(\n    slotOffset: number, pureFn: (v: any) => any, exp: any, thisArg?: any): any {\n  return pureFunction1Internal(getLView(), getBindingRoot(), slotOffset, pureFn, exp, thisArg);\n}\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunction2(\n    slotOffset: number, pureFn: (v1: any, v2: any) => any, exp1: any, exp2: any,\n    thisArg?: any): any {\n  return pureFunction2Internal(\n      getLView(), getBindingRoot(), slotOffset, pureFn, exp1, exp2, thisArg);\n}\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunction3(\n    slotOffset: number, pureFn: (v1: any, v2: any, v3: any) => any, exp1: any, exp2: any, exp3: any,\n    thisArg?: any): any {\n  return pureFunction3Internal(\n      getLView(), getBindingRoot(), slotOffset, pureFn, exp1, exp2, exp3, thisArg);\n}\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunction4(\n    slotOffset: number, pureFn: (v1: any, v2: any, v3: any, v4: any) => any, exp1: any, exp2: any,\n    exp3: any, exp4: any, thisArg?: any): any {\n  return pureFunction4Internal(\n      getLView(), getBindingRoot(), slotOffset, pureFn, exp1, exp2, exp3, exp4, thisArg);\n}\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param exp5\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunction5(\n    slotOffset: number, pureFn: (v1: any, v2: any, v3: any, v4: any, v5: any) => any, exp1: any,\n    exp2: any, exp3: any, exp4: any, exp5: any, thisArg?: any): any {\n  const bindingIndex = getBindingRoot() + slotOffset;\n  const lView = getLView();\n  const different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);\n  return bindingUpdated(lView, bindingIndex + 4, exp5) || different ?\n      updateBinding(\n          lView, bindingIndex + 5,\n          thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5) :\n                    pureFn(exp1, exp2, exp3, exp4, exp5)) :\n      getBinding(lView, bindingIndex + 5);\n}\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param exp5\n * @param exp6\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunction6(\n    slotOffset: number, pureFn: (v1: any, v2: any, v3: any, v4: any, v5: any, v6: any) => any,\n    exp1: any, exp2: any, exp3: any, exp4: any, exp5: any, exp6: any, thisArg?: any): any {\n  const bindingIndex = getBindingRoot() + slotOffset;\n  const lView = getLView();\n  const different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);\n  return bindingUpdated2(lView, bindingIndex + 4, exp5, exp6) || different ?\n      updateBinding(\n          lView, bindingIndex + 6,\n          thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5, exp6) :\n                    pureFn(exp1, exp2, exp3, exp4, exp5, exp6)) :\n      getBinding(lView, bindingIndex + 6);\n}\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param exp5\n * @param exp6\n * @param exp7\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunction7(\n    slotOffset: number,\n    pureFn: (v1: any, v2: any, v3: any, v4: any, v5: any, v6: any, v7: any) => any, exp1: any,\n    exp2: any, exp3: any, exp4: any, exp5: any, exp6: any, exp7: any, thisArg?: any): any {\n  const bindingIndex = getBindingRoot() + slotOffset;\n  const lView = getLView();\n  let different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);\n  return bindingUpdated3(lView, bindingIndex + 4, exp5, exp6, exp7) || different ?\n      updateBinding(\n          lView, bindingIndex + 7,\n          thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5, exp6, exp7) :\n                    pureFn(exp1, exp2, exp3, exp4, exp5, exp6, exp7)) :\n      getBinding(lView, bindingIndex + 7);\n}\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param exp5\n * @param exp6\n * @param exp7\n * @param exp8\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunction8(\n    slotOffset: number,\n    pureFn: (v1: any, v2: any, v3: any, v4: any, v5: any, v6: any, v7: any, v8: any) => any,\n    exp1: any, exp2: any, exp3: any, exp4: any, exp5: any, exp6: any, exp7: any, exp8: any,\n    thisArg?: any): any {\n  const bindingIndex = getBindingRoot() + slotOffset;\n  const lView = getLView();\n  const different = bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4);\n  return bindingUpdated4(lView, bindingIndex + 4, exp5, exp6, exp7, exp8) || different ?\n      updateBinding(\n          lView, bindingIndex + 8,\n          thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4, exp5, exp6, exp7, exp8) :\n                    pureFn(exp1, exp2, exp3, exp4, exp5, exp6, exp7, exp8)) :\n      getBinding(lView, bindingIndex + 8);\n}\n\n/**\n * pureFunction instruction that can support any number of bindings.\n *\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn A pure function that takes binding values and builds an object or array\n * containing those values.\n * @param exps An array of binding values\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n * @codeGenApi\n */\nexport function ɵɵpureFunctionV(\n    slotOffset: number, pureFn: (...v: any[]) => any, exps: any[], thisArg?: any): any {\n  return pureFunctionVInternal(getLView(), getBindingRoot(), slotOffset, pureFn, exps, thisArg);\n}\n\n/**\n * Results of a pure function invocation are stored in LView in a dedicated slot that is initialized\n * to NO_CHANGE. In rare situations a pure pipe might throw an exception on the very first\n * invocation and not produce any valid results. In this case LView would keep holding the NO_CHANGE\n * value. The NO_CHANGE is not something that we can use in expressions / bindings thus we convert\n * it to `undefined`.\n */\nfunction getPureFunctionReturnValue(lView: LView, returnValueIndex: number) {\n  ngDevMode && assertDataInRange(lView, returnValueIndex);\n  const lastReturnValue = lView[returnValueIndex];\n  return lastReturnValue === NO_CHANGE ? undefined : lastReturnValue;\n}\n\n/**\n * If the value of the provided exp has changed, calls the pure function to return\n * an updated value. Or if the value has not changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn Function that returns an updated value\n * @param exp Updated expression value\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n */\nexport function pureFunction1Internal(\n    lView: LView, bindingRoot: number, slotOffset: number, pureFn: (v: any) => any, exp: any,\n    thisArg?: any): any {\n  const bindingIndex = bindingRoot + slotOffset;\n  return bindingUpdated(lView, bindingIndex, exp) ?\n      updateBinding(lView, bindingIndex + 1, thisArg ? pureFn.call(thisArg, exp) : pureFn(exp)) :\n      getPureFunctionReturnValue(lView, bindingIndex + 1);\n}\n\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n */\nexport function pureFunction2Internal(\n    lView: LView, bindingRoot: number, slotOffset: number, pureFn: (v1: any, v2: any) => any,\n    exp1: any, exp2: any, thisArg?: any): any {\n  const bindingIndex = bindingRoot + slotOffset;\n  return bindingUpdated2(lView, bindingIndex, exp1, exp2) ?\n      updateBinding(\n          lView, bindingIndex + 2,\n          thisArg ? pureFn.call(thisArg, exp1, exp2) : pureFn(exp1, exp2)) :\n      getPureFunctionReturnValue(lView, bindingIndex + 2);\n}\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n */\nexport function pureFunction3Internal(\n    lView: LView, bindingRoot: number, slotOffset: number,\n    pureFn: (v1: any, v2: any, v3: any) => any, exp1: any, exp2: any, exp3: any,\n    thisArg?: any): any {\n  const bindingIndex = bindingRoot + slotOffset;\n  return bindingUpdated3(lView, bindingIndex, exp1, exp2, exp3) ?\n      updateBinding(\n          lView, bindingIndex + 3,\n          thisArg ? pureFn.call(thisArg, exp1, exp2, exp3) : pureFn(exp1, exp2, exp3)) :\n      getPureFunctionReturnValue(lView, bindingIndex + 3);\n}\n\n\n/**\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn\n * @param exp1\n * @param exp2\n * @param exp3\n * @param exp4\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n *\n */\nexport function pureFunction4Internal(\n    lView: LView, bindingRoot: number, slotOffset: number,\n    pureFn: (v1: any, v2: any, v3: any, v4: any) => any, exp1: any, exp2: any, exp3: any, exp4: any,\n    thisArg?: any): any {\n  const bindingIndex = bindingRoot + slotOffset;\n  return bindingUpdated4(lView, bindingIndex, exp1, exp2, exp3, exp4) ?\n      updateBinding(\n          lView, bindingIndex + 4,\n          thisArg ? pureFn.call(thisArg, exp1, exp2, exp3, exp4) : pureFn(exp1, exp2, exp3, exp4)) :\n      getPureFunctionReturnValue(lView, bindingIndex + 4);\n}\n\n/**\n * pureFunction instruction that can support any number of bindings.\n *\n * If the value of any provided exp has changed, calls the pure function to return\n * an updated value. Or if no values have changed, returns cached value.\n *\n * @param lView LView in which the function is being executed.\n * @param bindingRoot Binding root index.\n * @param slotOffset the offset from binding root to the reserved slot\n * @param pureFn A pure function that takes binding values and builds an object or array\n * containing those values.\n * @param exps An array of binding values\n * @param thisArg Optional calling context of pureFn\n * @returns Updated or cached value\n */\nexport function pureFunctionVInternal(\n    lView: LView, bindingRoot: number, slotOffset: number, pureFn: (...v: any[]) => any,\n    exps: any[], thisArg?: any): any {\n  let bindingIndex = bindingRoot + slotOffset;\n  let different = false;\n  for (let i = 0; i < exps.length; i++) {\n    bindingUpdated(lView, bindingIndex++, exps[i]) && (different = true);\n  }\n  return different ? updateBinding(lView, bindingIndex, pureFn.apply(thisArg, exps)) :\n                     getPureFunctionReturnValue(lView, bindingIndex);\n}\n"]}