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Author SHA1 Message Date
Joe Savona
2782d934e2 [compiler] Deprecate noEmit, add outputMode
This deprecates the `noEmit: boolean` flag and adds `outputMode: 'client' | 'client-no-memo' | 'ssr' | 'lint'` as the replacement. OutputMode defaults to null and takes precedence if specified, otherwise we use 'client' mode for noEmit=false and 'lint' mode for noEmit=true.

Key points:
* Retrying failed compilation switches from 'client' mode to 'client-no-memo'
* Validations are enabled behind Environment.proto.shouldEnableValidations, enabled for all modes except 'client-no-memo'. Similar for dropping manual memoization.
* OptimizeSSR is now gated by the outputMode==='ssr', not a feature flag
* Creation of reactive scopes, and related codegen logic, is now gated by outputMode==='client'
2025-11-20 15:03:35 -08:00
161 changed files with 247 additions and 2480 deletions

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@@ -1,9 +0,0 @@
{
"permissions": {
"allow": [
"Bash(node scripts/enable-feature-flag.js:*)"
],
"deny": [],
"ask": []
}
}

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@@ -304,30 +304,6 @@ export class CompilerError extends Error {
disabledDetails: Array<CompilerErrorDetail | CompilerDiagnostic> = [];
printedMessage: string | null = null;
static simpleInvariant(
condition: unknown,
options: {
reason: CompilerDiagnosticOptions['reason'];
description?: CompilerDiagnosticOptions['description'];
loc: SourceLocation;
},
): asserts condition {
if (!condition) {
const errors = new CompilerError();
errors.pushDiagnostic(
CompilerDiagnostic.create({
reason: options.reason,
description: options.description ?? null,
category: ErrorCategory.Invariant,
}).withDetails({
kind: 'error',
loc: options.loc,
message: options.reason,
}),
);
throw errors;
}
}
static invariant(
condition: unknown,
options: Omit<CompilerDiagnosticOptions, 'category'>,
@@ -600,8 +576,7 @@ function printErrorSummary(category: ErrorCategory, message: string): string {
case ErrorCategory.Suppression:
case ErrorCategory.Syntax:
case ErrorCategory.UseMemo:
case ErrorCategory.VoidUseMemo:
case ErrorCategory.MemoDependencies: {
case ErrorCategory.VoidUseMemo: {
heading = 'Error';
break;
}
@@ -659,10 +634,6 @@ export enum ErrorCategory {
* Checks that manual memoization is preserved
*/
PreserveManualMemo = 'PreserveManualMemo',
/**
* Checks for exhaustive useMemo/useCallback dependencies without extraneous values
*/
MemoDependencies = 'MemoDependencies',
/**
* Checks for known incompatible libraries
*/
@@ -1060,24 +1031,6 @@ function getRuleForCategoryImpl(category: ErrorCategory): LintRule {
preset: LintRulePreset.RecommendedLatest,
};
}
case ErrorCategory.MemoDependencies: {
return {
category,
severity: ErrorSeverity.Error,
name: 'memo-dependencies',
description:
'Validates that useMemo() and useCallback() specify comprehensive dependencies without extraneous values. See [`useMemo()` docs](https://react.dev/reference/react/useMemo) for more information.',
/**
* TODO: the "MemoDependencies" rule largely reimplements the "exhaustive-deps" non-compiler rule,
* allowing the compiler to ensure it does not regress change behavior due to different dependencies.
* We previously relied on the source having ESLint suppressions for any exhaustive-deps violations,
* but it's more reliable to verify it within the compiler.
*
* Long-term we should de-duplicate these implementations.
*/
preset: LintRulePreset.Off,
};
}
case ErrorCategory.IncompatibleLibrary: {
return {
category,

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@@ -105,7 +105,6 @@ import {validateNoDerivedComputationsInEffects} from '../Validation/ValidateNoDe
import {validateNoDerivedComputationsInEffects_exp} from '../Validation/ValidateNoDerivedComputationsInEffects_exp';
import {nameAnonymousFunctions} from '../Transform/NameAnonymousFunctions';
import {optimizeForSSR} from '../Optimization/OptimizeForSSR';
import {validateExhaustiveDependencies} from '../Validation/ValidateExhaustiveDependencies';
import {validateSourceLocations} from '../Validation/ValidateSourceLocations';
export type CompilerPipelineValue =
@@ -303,13 +302,6 @@ function runWithEnvironment(
inferReactivePlaces(hir);
log({kind: 'hir', name: 'InferReactivePlaces', value: hir});
if (env.enableValidations) {
if (env.config.validateExhaustiveMemoizationDependencies) {
// NOTE: this relies on reactivity inference running first
validateExhaustiveDependencies(hir).unwrap();
}
}
rewriteInstructionKindsBasedOnReassignment(hir);
log({
kind: 'hir',

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@@ -400,15 +400,7 @@ export function compileProgram(
*/
const suppressions = findProgramSuppressions(
pass.comments,
/*
* If the compiler is validating hooks rules and exhaustive memo dependencies, we don't need to check
* for React ESLint suppressions
*/
pass.opts.environment.validateExhaustiveMemoizationDependencies &&
pass.opts.environment.validateHooksUsage
? null
: (pass.opts.eslintSuppressionRules ?? DEFAULT_ESLINT_SUPPRESSIONS),
// Always bail on Flow suppressions
pass.opts.eslintSuppressionRules ?? DEFAULT_ESLINT_SUPPRESSIONS,
pass.opts.flowSuppressions,
);

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@@ -78,7 +78,7 @@ export function filterSuppressionsThatAffectFunction(
export function findProgramSuppressions(
programComments: Array<t.Comment>,
ruleNames: Array<string> | null,
ruleNames: Array<string>,
flowSuppressions: boolean,
): Array<SuppressionRange> {
const suppressionRanges: Array<SuppressionRange> = [];
@@ -89,7 +89,7 @@ export function findProgramSuppressions(
let disableNextLinePattern: RegExp | null = null;
let disablePattern: RegExp | null = null;
let enablePattern: RegExp | null = null;
if (ruleNames != null && ruleNames.length !== 0) {
if (ruleNames.length !== 0) {
const rulePattern = `(${ruleNames.join('|')})`;
disableNextLinePattern = new RegExp(
`eslint-disable-next-line ${rulePattern}`,

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@@ -218,11 +218,6 @@ export const EnvironmentConfigSchema = z.object({
*/
validatePreserveExistingMemoizationGuarantees: z.boolean().default(true),
/**
* Validate that dependencies supplied to manual memoization calls are exhaustive.
*/
validateExhaustiveMemoizationDependencies: z.boolean().default(true),
/**
* When this is true, rather than pruning existing manual memoization but ensuring or validating
* that the memoized values remain memoized, the compiler will simply not prune existing calls to

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@@ -803,7 +803,6 @@ export type ManualMemoDependency = {
| {
kind: 'NamedLocal';
value: Place;
constant: boolean;
}
| {kind: 'Global'; identifierName: string};
path: DependencyPath;
@@ -818,11 +817,6 @@ export type StartMemoize = {
* (e.g. useMemo without a second arg)
*/
deps: Array<ManualMemoDependency> | null;
/**
* The source location of the dependencies argument. Used for
* emitting diagnostics with a suggested replacement
*/
depsLoc: SourceLocation | null;
loc: SourceLocation;
};
export type FinishMemoize = {
@@ -1686,28 +1680,6 @@ export function areEqualPaths(a: DependencyPath, b: DependencyPath): boolean {
)
);
}
export function isSubPath(
subpath: DependencyPath,
path: DependencyPath,
): boolean {
return (
subpath.length <= path.length &&
subpath.every(
(item, ix) =>
item.property === path[ix].property &&
item.optional === path[ix].optional,
)
);
}
export function isSubPathIgnoringOptionals(
subpath: DependencyPath,
path: DependencyPath,
): boolean {
return (
subpath.length <= path.length &&
subpath.every((item, ix) => item.property === path[ix].property)
);
}
export function getPlaceScope(
id: InstructionId,

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@@ -42,7 +42,7 @@ type IdentifierSidemap = {
functions: Map<IdentifierId, TInstruction<FunctionExpression>>;
manualMemos: Map<IdentifierId, ManualMemoCallee>;
react: Set<IdentifierId>;
maybeDepsLists: Map<IdentifierId, {loc: SourceLocation; deps: Array<Place>}>;
maybeDepsLists: Map<IdentifierId, Array<Place>>;
maybeDeps: Map<IdentifierId, ManualMemoDependency>;
optionals: Set<IdentifierId>;
};
@@ -92,7 +92,6 @@ export function collectMaybeMemoDependencies(
root: {
kind: 'NamedLocal',
value: {...value.place},
constant: false,
},
path: [],
};
@@ -160,10 +159,10 @@ function collectTemporaries(
}
case 'ArrayExpression': {
if (value.elements.every(e => e.kind === 'Identifier')) {
sidemap.maybeDepsLists.set(instr.lvalue.identifier.id, {
loc: value.loc,
deps: value.elements as Array<Place>,
});
sidemap.maybeDepsLists.set(
instr.lvalue.identifier.id,
value.elements as Array<Place>,
);
}
break;
}
@@ -183,7 +182,6 @@ function makeManualMemoizationMarkers(
fnExpr: Place,
env: Environment,
depsList: Array<ManualMemoDependency> | null,
depsLoc: SourceLocation | null,
memoDecl: Place,
manualMemoId: number,
): [TInstruction<StartMemoize>, TInstruction<FinishMemoize>] {
@@ -199,7 +197,6 @@ function makeManualMemoizationMarkers(
* as dependencies
*/
deps: depsList,
depsLoc,
loc: fnExpr.loc,
},
effects: null,
@@ -290,85 +287,86 @@ function extractManualMemoizationArgs(
sidemap: IdentifierSidemap,
errors: CompilerError,
): {
fnPlace: Place;
fnPlace: Place | null;
depsList: Array<ManualMemoDependency> | null;
depsLoc: SourceLocation | null;
} | null {
} {
const [fnPlace, depsListPlace] = instr.value.args as Array<
Place | SpreadPattern | undefined
>;
if (fnPlace == null || fnPlace.kind !== 'Identifier') {
if (fnPlace == null) {
errors.pushDiagnostic(
CompilerDiagnostic.create({
category: ErrorCategory.UseMemo,
reason: `Expected a callback function to be passed to ${kind}`,
description:
kind === 'useCallback'
? 'The first argument to useCallback() must be a function to cache'
: 'The first argument to useMemo() must be a function that calculates a result to cache',
description: `Expected a callback function to be passed to ${kind}`,
suggestions: null,
}).withDetails({
kind: 'error',
loc: instr.value.loc,
message:
kind === 'useCallback'
? `Expected a callback function`
: `Expected a memoization function`,
message: `Expected a callback function to be passed to ${kind}`,
}),
);
return null;
return {fnPlace: null, depsList: null};
}
if (depsListPlace == null) {
return {
fnPlace,
depsList: null,
depsLoc: null,
};
}
const maybeDepsList =
depsListPlace.kind === 'Identifier'
? sidemap.maybeDepsLists.get(depsListPlace.identifier.id)
: null;
if (maybeDepsList == null) {
if (fnPlace.kind === 'Spread' || depsListPlace?.kind === 'Spread') {
errors.pushDiagnostic(
CompilerDiagnostic.create({
category: ErrorCategory.UseMemo,
reason: `Expected the dependency list for ${kind} to be an array literal`,
description: `Expected the dependency list for ${kind} to be an array literal`,
reason: `Unexpected spread argument to ${kind}`,
description: `Unexpected spread argument to ${kind}`,
suggestions: null,
}).withDetails({
kind: 'error',
loc:
depsListPlace?.kind === 'Identifier' ? depsListPlace.loc : instr.loc,
message: `Expected the dependency list for ${kind} to be an array literal`,
loc: instr.value.loc,
message: `Unexpected spread argument to ${kind}`,
}),
);
return null;
return {fnPlace: null, depsList: null};
}
const depsList: Array<ManualMemoDependency> = [];
for (const dep of maybeDepsList.deps) {
const maybeDep = sidemap.maybeDeps.get(dep.identifier.id);
if (maybeDep == null) {
let depsList: Array<ManualMemoDependency> | null = null;
if (depsListPlace != null) {
const maybeDepsList = sidemap.maybeDepsLists.get(
depsListPlace.identifier.id,
);
if (maybeDepsList == null) {
errors.pushDiagnostic(
CompilerDiagnostic.create({
category: ErrorCategory.UseMemo,
reason: `Expected the dependency list to be an array of simple expressions (e.g. \`x\`, \`x.y.z\`, \`x?.y?.z\`)`,
description: `Expected the dependency list to be an array of simple expressions (e.g. \`x\`, \`x.y.z\`, \`x?.y?.z\`)`,
reason: `Expected the dependency list for ${kind} to be an array literal`,
description: `Expected the dependency list for ${kind} to be an array literal`,
suggestions: null,
}).withDetails({
kind: 'error',
loc: dep.loc,
message: `Expected the dependency list to be an array of simple expressions (e.g. \`x\`, \`x.y.z\`, \`x?.y?.z\`)`,
loc: depsListPlace.loc,
message: `Expected the dependency list for ${kind} to be an array literal`,
}),
);
} else {
depsList.push(maybeDep);
return {fnPlace, depsList: null};
}
depsList = [];
for (const dep of maybeDepsList) {
const maybeDep = sidemap.maybeDeps.get(dep.identifier.id);
if (maybeDep == null) {
errors.pushDiagnostic(
CompilerDiagnostic.create({
category: ErrorCategory.UseMemo,
reason: `Expected the dependency list to be an array of simple expressions (e.g. \`x\`, \`x.y.z\`, \`x?.y?.z\`)`,
description: `Expected the dependency list to be an array of simple expressions (e.g. \`x\`, \`x.y.z\`, \`x?.y?.z\`)`,
suggestions: null,
}).withDetails({
kind: 'error',
loc: dep.loc,
message: `Expected the dependency list to be an array of simple expressions (e.g. \`x\`, \`x.y.z\`, \`x?.y?.z\`)`,
}),
);
} else {
depsList.push(maybeDep);
}
}
}
return {
fnPlace,
depsList,
depsLoc: maybeDepsList.loc,
};
}
@@ -429,17 +427,16 @@ export function dropManualMemoization(
const manualMemo = sidemap.manualMemos.get(id);
if (manualMemo != null) {
const memoDetails = extractManualMemoizationArgs(
const {fnPlace, depsList} = extractManualMemoizationArgs(
instr as TInstruction<CallExpression> | TInstruction<MethodCall>,
manualMemo.kind,
sidemap,
errors,
);
if (memoDetails == null) {
if (fnPlace == null) {
continue;
}
const {fnPlace, depsList, depsLoc} = memoDetails;
instr.value = getManualMemoizationReplacement(
fnPlace,
@@ -490,7 +487,6 @@ export function dropManualMemoization(
fnPlace,
func.env,
depsList,
depsLoc,
memoDecl,
nextManualMemoId++,
);

View File

@@ -609,19 +609,6 @@ function evaluateInstruction(
constantPropagationImpl(value.loweredFunc.func, constants);
return null;
}
case 'StartMemoize': {
if (value.deps != null) {
for (const dep of value.deps) {
if (dep.root.kind === 'NamedLocal') {
const placeValue = read(constants, dep.root.value);
if (placeValue != null && placeValue.kind === 'Primitive') {
dep.root.constant = true;
}
}
}
}
return null;
}
default: {
// TODO: handle more cases
return null;

View File

@@ -1,828 +0,0 @@
/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
import prettyFormat from 'pretty-format';
import {
CompilerDiagnostic,
CompilerError,
CompilerSuggestionOperation,
SourceLocation,
} from '..';
import {CompilerSuggestion, ErrorCategory} from '../CompilerError';
import {
areEqualPaths,
BlockId,
DependencyPath,
FinishMemoize,
HIRFunction,
Identifier,
IdentifierId,
InstructionKind,
isPrimitiveType,
isStableType,
isSubPath,
isSubPathIgnoringOptionals,
isUseRefType,
LoadGlobal,
ManualMemoDependency,
Place,
StartMemoize,
} from '../HIR';
import {
eachInstructionLValue,
eachInstructionValueLValue,
eachInstructionValueOperand,
eachTerminalOperand,
} from '../HIR/visitors';
import {Result} from '../Utils/Result';
import {retainWhere} from '../Utils/utils';
const DEBUG = false;
/**
* Validates that existing manual memoization is exhaustive and does not
* have extraneous dependencies. The goal of the validation is to ensure
* that auto-memoization will not substantially change the behavior of
* the program:
* - If the manual dependencies were non-exhaustive (missing important deps)
* then auto-memoization will include those dependencies, and cause the
* value to update *more* frequently.
* - If the manual dependencies had extraneous deps, then auto memoization
* will remove them and cause the value to update *less* frequently.
*
* The implementation compares the manual dependencies against the values
* actually used within the memoization function
* - For each value V referenced in the memo function, either:
* - If the value is non-reactive *and* a known stable type, then the
* value may optionally be specified as an exact dependency.
* - Otherwise, report an error unless there is a manual dependency that will
* invalidate whenever V invalidates. If `x.y.z` is referenced, there must
* be a manual dependency for `x.y.z`, `x.y`, or `x`. Note that we assume
* no interior mutability, ie we assume that any changes to inner paths must
* always cause the other path to change as well.
* - Any dependencies that do not correspond to a value referenced in the memo
* function are considered extraneous and throw an error
*
* ## TODO: Invalid, Complex Deps
*
* Handle cases where the user deps were not simple identifiers + property chains.
* We try to detect this in ValidateUseMemo but we miss some cases. The problem
* is that invalid forms can be value blocks or function calls that don't get
* removed by DCE, leaving a structure like:
*
* StartMemoize
* t0 = <value to memoize>
* ...non-DCE'd code for manual deps...
* FinishMemoize decl=t0
*
* When we go to compute the dependencies, we then think that the user's manual dep
* logic is part of what the memo computation logic.
*/
export function validateExhaustiveDependencies(
fn: HIRFunction,
): Result<void, CompilerError> {
const reactive = collectReactiveIdentifiersHIR(fn);
const temporaries: Map<IdentifierId, Temporary> = new Map();
for (const param of fn.params) {
const place = param.kind === 'Identifier' ? param : param.place;
temporaries.set(place.identifier.id, {
kind: 'Local',
identifier: place.identifier,
path: [],
context: false,
loc: place.loc,
});
}
const error = new CompilerError();
let startMemo: StartMemoize | null = null;
function onStartMemoize(
value: StartMemoize,
dependencies: Set<InferredDependency>,
locals: Set<IdentifierId>,
): void {
CompilerError.simpleInvariant(startMemo == null, {
reason: 'Unexpected nested memo calls',
loc: value.loc,
});
startMemo = value;
dependencies.clear();
locals.clear();
}
function onFinishMemoize(
value: FinishMemoize,
dependencies: Set<InferredDependency>,
locals: Set<IdentifierId>,
): void {
CompilerError.simpleInvariant(
startMemo != null && startMemo.manualMemoId === value.manualMemoId,
{
reason: 'Found FinishMemoize without corresponding StartMemoize',
loc: value.loc,
},
);
visitCandidateDependency(value.decl, temporaries, dependencies, locals);
const inferred: Array<InferredDependency> = Array.from(dependencies);
// Sort dependencies by name and path, with shorter/non-optional paths first
inferred.sort((a, b) => {
if (a.kind === 'Global' && b.kind == 'Global') {
return a.binding.name.localeCompare(b.binding.name);
} else if (a.kind == 'Local' && b.kind == 'Local') {
CompilerError.simpleInvariant(
a.identifier.name != null &&
a.identifier.name.kind === 'named' &&
b.identifier.name != null &&
b.identifier.name.kind === 'named',
{
reason: 'Expected dependencies to be named variables',
loc: a.loc,
},
);
if (a.identifier.id !== b.identifier.id) {
return a.identifier.name.value.localeCompare(b.identifier.name.value);
}
if (a.path.length !== b.path.length) {
// if a's path is shorter this returns a negative, sorting a first
return a.path.length - b.path.length;
}
for (let i = 0; i < a.path.length; i++) {
const aProperty = a.path[i];
const bProperty = b.path[i];
const aOptional = aProperty.optional ? 0 : 1;
const bOptional = bProperty.optional ? 0 : 1;
if (aOptional !== bOptional) {
// sort non-optionals first
return aOptional - bOptional;
} else if (aProperty.property !== bProperty.property) {
return String(aProperty.property).localeCompare(
String(bProperty.property),
);
}
}
return 0;
} else {
const aName =
a.kind === 'Global' ? a.binding.name : a.identifier.name?.value;
const bName =
b.kind === 'Global' ? b.binding.name : b.identifier.name?.value;
if (aName != null && bName != null) {
return aName.localeCompare(bName);
}
return 0;
}
});
// remove redundant inferred dependencies
retainWhere(inferred, (dep, ix) => {
const match = inferred.findIndex(prevDep => {
return (
isEqualTemporary(prevDep, dep) ||
(prevDep.kind === 'Local' &&
dep.kind === 'Local' &&
prevDep.identifier.id === dep.identifier.id &&
isSubPath(prevDep.path, dep.path))
);
});
// only retain entries that don't have a prior match
return match === -1 || match >= ix;
});
// Validate that all manual dependencies belong there
if (DEBUG) {
console.log('manual');
console.log(
(startMemo.deps ?? [])
.map(x => ' ' + printManualMemoDependency(x))
.join('\n'),
);
console.log('inferred');
console.log(
inferred.map(x => ' ' + printInferredDependency(x)).join('\n'),
);
}
const manualDependencies = startMemo.deps ?? [];
const matched: Set<ManualMemoDependency> = new Set();
const missing: Array<Extract<InferredDependency, {kind: 'Local'}>> = [];
const extra: Array<ManualMemoDependency> = [];
for (const inferredDependency of inferred) {
if (inferredDependency.kind === 'Global') {
for (const manualDependency of manualDependencies) {
if (
manualDependency.root.kind === 'Global' &&
manualDependency.root.identifierName ===
inferredDependency.binding.name
) {
matched.add(manualDependency);
extra.push(manualDependency);
}
}
continue;
}
CompilerError.simpleInvariant(inferredDependency.kind === 'Local', {
reason: 'Unexpected function dependency',
loc: value.loc,
});
let hasMatchingManualDependency = false;
for (const manualDependency of manualDependencies) {
if (
manualDependency.root.kind === 'NamedLocal' &&
manualDependency.root.value.identifier.id ===
inferredDependency.identifier.id &&
(areEqualPaths(manualDependency.path, inferredDependency.path) ||
isSubPathIgnoringOptionals(
manualDependency.path,
inferredDependency.path,
))
) {
hasMatchingManualDependency = true;
matched.add(manualDependency);
}
}
const isOptionalDependency =
!reactive.has(inferredDependency.identifier.id) &&
(isStableType(inferredDependency.identifier) ||
isPrimitiveType(inferredDependency.identifier));
if (hasMatchingManualDependency || isOptionalDependency) {
continue;
}
missing.push(inferredDependency);
}
for (const dep of startMemo.deps ?? []) {
if (matched.has(dep)) {
continue;
}
if (dep.root.kind === 'NamedLocal' && dep.root.constant) {
CompilerError.simpleInvariant(
!dep.root.value.reactive &&
isPrimitiveType(dep.root.value.identifier),
{
reason: 'Expected constant-folded dependency to be non-reactive',
loc: dep.root.value.loc,
},
);
/*
* Constant primitives can get constant-folded, which means we won't
* see a LoadLocal for the value within the memo function.
*/
continue;
}
extra.push(dep);
}
if (missing.length !== 0 || extra.length !== 0) {
let suggestions: Array<CompilerSuggestion> | null = null;
if (startMemo.depsLoc != null && typeof startMemo.depsLoc !== 'symbol') {
suggestions = [
{
description: 'Update dependencies',
range: [startMemo.depsLoc.start.index, startMemo.depsLoc.end.index],
op: CompilerSuggestionOperation.Replace,
text: `[${inferred.map(printInferredDependency).join(', ')}]`,
},
];
}
if (missing.length !== 0) {
const diagnostic = CompilerDiagnostic.create({
category: ErrorCategory.MemoDependencies,
reason: 'Found missing memoization dependencies',
description:
'Missing dependencies can cause a value not to update when those inputs change, ' +
'resulting in stale UI',
suggestions,
});
for (const dep of missing) {
let reactiveStableValueHint = '';
if (isStableType(dep.identifier)) {
reactiveStableValueHint =
'. Refs, setState functions, and other "stable" values generally do not need to be added as dependencies, but this variable may change over time to point to different values';
}
diagnostic.withDetails({
kind: 'error',
message: `Missing dependency \`${printInferredDependency(dep)}\`${reactiveStableValueHint}`,
loc: dep.loc,
});
}
error.pushDiagnostic(diagnostic);
} else if (extra.length !== 0) {
const diagnostic = CompilerDiagnostic.create({
category: ErrorCategory.MemoDependencies,
reason: 'Found unnecessary memoization dependencies',
description:
'Unnecessary dependencies can cause a value to update more often than necessary, ' +
'causing performance regressions and effects to fire more often than expected',
});
diagnostic.withDetails({
kind: 'error',
message: `Unnecessary dependencies ${extra.map(dep => `\`${printManualMemoDependency(dep)}\``).join(', ')}`,
loc: startMemo.depsLoc ?? value.loc,
});
error.pushDiagnostic(diagnostic);
}
}
dependencies.clear();
locals.clear();
startMemo = null;
}
collectDependencies(
fn,
temporaries,
{
onStartMemoize,
onFinishMemoize,
},
false, // isFunctionExpression
);
return error.asResult();
}
function addDependency(
dep: Temporary,
dependencies: Set<InferredDependency>,
locals: Set<IdentifierId>,
): void {
if (dep.kind === 'Function') {
for (const x of dep.dependencies) {
addDependency(x, dependencies, locals);
}
} else if (dep.kind === 'Global') {
dependencies.add(dep);
} else if (!locals.has(dep.identifier.id)) {
dependencies.add(dep);
}
}
function visitCandidateDependency(
place: Place,
temporaries: Map<IdentifierId, Temporary>,
dependencies: Set<InferredDependency>,
locals: Set<IdentifierId>,
): void {
const dep = temporaries.get(place.identifier.id);
if (dep != null) {
addDependency(dep, dependencies, locals);
}
}
/**
* This function determines the dependencies of the given function relative to
* its external context. Dependencies are collected eagerly, the first time an
* external variable is referenced, as opposed to trying to delay or aggregate
* calculation of dependencies until they are later "used".
*
* For example, in
*
* ```
* function f() {
* let x = y; // we record a dependency on `y` here
* ...
* use(x); // as opposed to trying to delay that dependency until here
* }
* ```
*
* That said, LoadLocal/LoadContext does not immediately take a dependency,
* we store the dependency in a temporary and set it as used when that temporary
* is referenced as an operand.
*
* As we proceed through the function we track local variables that it creates
* and don't consider later references to these variables as dependencies.
*
* For function expressions we first collect the function's dependencies by
* calling this function recursively, _without_ taking into account whether
* the "external" variables it accesses are actually external or just locals
* in the parent. We then prune any locals and immediately consider any
* remaining externals that it accesses as a dependency:
*
* ```
* function Component() {
* const local = ...;
* const f = () => { return [external, local] };
* }
* ```
*
* Here we calculate `f` as having dependencies `external, `local` and save
* this into `temporaries`. We then also immediately take these as dependencies
* at the Component scope, at which point we filter out `local` as a local variable,
* leaving just a dependency on `external`.
*
* When calling this function on a top-level component or hook, the collected dependencies
* will only contain the globals that it accesses which isn't useful. Instead, passing
* onStartMemoize/onFinishMemoize callbacks allows looking at the dependencies within
* blocks of manual memoization.
*/
function collectDependencies(
fn: HIRFunction,
temporaries: Map<IdentifierId, Temporary>,
callbacks: {
onStartMemoize: (
startMemo: StartMemoize,
dependencies: Set<InferredDependency>,
locals: Set<IdentifierId>,
) => void;
onFinishMemoize: (
finishMemo: FinishMemoize,
dependencies: Set<InferredDependency>,
locals: Set<IdentifierId>,
) => void;
} | null,
isFunctionExpression: boolean,
): Extract<Temporary, {kind: 'Function'}> {
const optionals = findOptionalPlaces(fn);
if (DEBUG) {
console.log(prettyFormat(optionals));
}
const locals: Set<IdentifierId> = new Set();
if (isFunctionExpression) {
for (const param of fn.params) {
const place = param.kind === 'Identifier' ? param : param.place;
locals.add(place.identifier.id);
}
}
const dependencies: Set<InferredDependency> = new Set();
function visit(place: Place): void {
visitCandidateDependency(place, temporaries, dependencies, locals);
}
for (const block of fn.body.blocks.values()) {
for (const phi of block.phis) {
let deps: Array<Temporary> | null = null;
for (const operand of phi.operands.values()) {
const dep = temporaries.get(operand.identifier.id);
if (dep == null) {
continue;
}
if (deps == null) {
deps = [dep];
} else {
deps.push(dep);
}
}
if (deps == null) {
continue;
} else if (deps.length === 1) {
temporaries.set(phi.place.identifier.id, deps[0]!);
} else {
temporaries.set(phi.place.identifier.id, {
kind: 'Function',
dependencies: new Set(deps),
});
}
}
for (const instr of block.instructions) {
const {lvalue, value} = instr;
switch (value.kind) {
case 'LoadGlobal': {
temporaries.set(lvalue.identifier.id, {
kind: 'Global',
binding: value.binding,
});
break;
}
case 'LoadContext':
case 'LoadLocal': {
if (locals.has(value.place.identifier.id)) {
break;
}
const temp = temporaries.get(value.place.identifier.id);
if (temp != null) {
if (temp.kind === 'Local') {
const local: Temporary = {...temp, loc: value.place.loc};
temporaries.set(lvalue.identifier.id, local);
} else {
temporaries.set(lvalue.identifier.id, temp);
}
}
break;
}
case 'DeclareLocal': {
const local: Temporary = {
kind: 'Local',
identifier: value.lvalue.place.identifier,
path: [],
context: false,
loc: value.lvalue.place.loc,
};
temporaries.set(value.lvalue.place.identifier.id, local);
locals.add(value.lvalue.place.identifier.id);
break;
}
case 'StoreLocal': {
if (value.lvalue.place.identifier.name == null) {
const temp = temporaries.get(value.value.identifier.id);
if (temp != null) {
temporaries.set(value.lvalue.place.identifier.id, temp);
}
break;
}
visit(value.value);
if (value.lvalue.kind !== InstructionKind.Reassign) {
const local: Temporary = {
kind: 'Local',
identifier: value.lvalue.place.identifier,
path: [],
context: false,
loc: value.lvalue.place.loc,
};
temporaries.set(value.lvalue.place.identifier.id, local);
locals.add(value.lvalue.place.identifier.id);
}
break;
}
case 'DeclareContext': {
const local: Temporary = {
kind: 'Local',
identifier: value.lvalue.place.identifier,
path: [],
context: true,
loc: value.lvalue.place.loc,
};
temporaries.set(value.lvalue.place.identifier.id, local);
break;
}
case 'StoreContext': {
visit(value.value);
if (value.lvalue.kind !== InstructionKind.Reassign) {
const local: Temporary = {
kind: 'Local',
identifier: value.lvalue.place.identifier,
path: [],
context: true,
loc: value.lvalue.place.loc,
};
temporaries.set(value.lvalue.place.identifier.id, local);
locals.add(value.lvalue.place.identifier.id);
}
break;
}
case 'Destructure': {
visit(value.value);
if (value.lvalue.kind !== InstructionKind.Reassign) {
for (const lvalue of eachInstructionValueLValue(value)) {
const local: Temporary = {
kind: 'Local',
identifier: lvalue.identifier,
path: [],
context: false,
loc: lvalue.loc,
};
temporaries.set(lvalue.identifier.id, local);
locals.add(lvalue.identifier.id);
}
}
break;
}
case 'PropertyLoad': {
if (
typeof value.property === 'number' ||
(isUseRefType(value.object.identifier) &&
value.property === 'current')
) {
visit(value.object);
break;
}
const object = temporaries.get(value.object.identifier.id);
if (object != null && object.kind === 'Local') {
const optional = optionals.get(value.object.identifier.id) ?? false;
const local: Temporary = {
kind: 'Local',
identifier: object.identifier,
context: object.context,
path: [
...object.path,
{
optional,
property: value.property,
},
],
loc: value.loc,
};
temporaries.set(lvalue.identifier.id, local);
}
break;
}
case 'FunctionExpression':
case 'ObjectMethod': {
const functionDeps = collectDependencies(
value.loweredFunc.func,
temporaries,
null,
true, // isFunctionExpression
);
temporaries.set(lvalue.identifier.id, functionDeps);
addDependency(functionDeps, dependencies, locals);
break;
}
case 'StartMemoize': {
const onStartMemoize = callbacks?.onStartMemoize;
if (onStartMemoize != null) {
onStartMemoize(value, dependencies, locals);
}
break;
}
case 'FinishMemoize': {
const onFinishMemoize = callbacks?.onFinishMemoize;
if (onFinishMemoize != null) {
onFinishMemoize(value, dependencies, locals);
}
break;
}
case 'MethodCall': {
// Ignore the method itself
for (const operand of eachInstructionValueOperand(value)) {
if (operand.identifier.id === value.property.identifier.id) {
continue;
}
visit(operand);
}
break;
}
default: {
for (const operand of eachInstructionValueOperand(value)) {
visit(operand);
}
for (const lvalue of eachInstructionLValue(instr)) {
locals.add(lvalue.identifier.id);
}
}
}
}
for (const operand of eachTerminalOperand(block.terminal)) {
if (optionals.has(operand.identifier.id)) {
continue;
}
visit(operand);
}
}
return {kind: 'Function', dependencies};
}
function printInferredDependency(dep: InferredDependency): string {
switch (dep.kind) {
case 'Global': {
return dep.binding.name;
}
case 'Local': {
CompilerError.simpleInvariant(
dep.identifier.name != null && dep.identifier.name.kind === 'named',
{
reason: 'Expected dependencies to be named variables',
loc: dep.loc,
},
);
return `${dep.identifier.name.value}${dep.path.map(p => (p.optional ? '?' : '') + '.' + p.property).join('')}`;
}
}
}
function printManualMemoDependency(dep: ManualMemoDependency): string {
let identifierName: string;
if (dep.root.kind === 'Global') {
identifierName = dep.root.identifierName;
} else {
const name = dep.root.value.identifier.name;
CompilerError.simpleInvariant(name != null && name.kind === 'named', {
reason: 'Expected manual dependencies to be named variables',
loc: dep.root.value.loc,
});
identifierName = name.value;
}
return `${identifierName}${dep.path.map(p => (p.optional ? '?' : '') + '.' + p.property).join('')}`;
}
function isEqualTemporary(a: Temporary, b: Temporary): boolean {
switch (a.kind) {
case 'Function': {
return false;
}
case 'Global': {
return b.kind === 'Global' && a.binding.name === b.binding.name;
}
case 'Local': {
return (
b.kind === 'Local' &&
a.identifier.id === b.identifier.id &&
areEqualPaths(a.path, b.path)
);
}
}
}
type Temporary =
| {kind: 'Global'; binding: LoadGlobal['binding']}
| {
kind: 'Local';
identifier: Identifier;
path: DependencyPath;
context: boolean;
loc: SourceLocation;
}
| {kind: 'Function'; dependencies: Set<Temporary>};
type InferredDependency = Extract<Temporary, {kind: 'Local' | 'Global'}>;
function collectReactiveIdentifiersHIR(fn: HIRFunction): Set<IdentifierId> {
const reactive = new Set<IdentifierId>();
for (const block of fn.body.blocks.values()) {
for (const instr of block.instructions) {
for (const lvalue of eachInstructionLValue(instr)) {
if (lvalue.reactive) {
reactive.add(lvalue.identifier.id);
}
}
for (const operand of eachInstructionValueOperand(instr.value)) {
if (operand.reactive) {
reactive.add(operand.identifier.id);
}
}
}
for (const operand of eachTerminalOperand(block.terminal)) {
if (operand.reactive) {
reactive.add(operand.identifier.id);
}
}
}
return reactive;
}
export function findOptionalPlaces(
fn: HIRFunction,
): Map<IdentifierId, boolean> {
const optionals = new Map<IdentifierId, boolean>();
const visited: Set<BlockId> = new Set();
for (const [, block] of fn.body.blocks) {
if (visited.has(block.id)) {
continue;
}
if (block.terminal.kind === 'optional') {
visited.add(block.id);
const optionalTerminal = block.terminal;
let testBlock = fn.body.blocks.get(block.terminal.test)!;
const queue: Array<boolean | null> = [block.terminal.optional];
loop: while (true) {
visited.add(testBlock.id);
const terminal = testBlock.terminal;
switch (terminal.kind) {
case 'branch': {
const isOptional = queue.pop();
CompilerError.simpleInvariant(isOptional !== undefined, {
reason:
'Expected an optional value for each optional test condition',
loc: terminal.test.loc,
});
if (isOptional != null) {
optionals.set(terminal.test.identifier.id, isOptional);
}
if (terminal.fallthrough === optionalTerminal.fallthrough) {
// found it
const consequent = fn.body.blocks.get(terminal.consequent)!;
const last = consequent.instructions.at(-1);
if (last !== undefined && last.value.kind === 'StoreLocal') {
if (isOptional != null) {
optionals.set(last.value.value.identifier.id, isOptional);
}
}
break loop;
} else {
testBlock = fn.body.blocks.get(terminal.fallthrough)!;
}
break;
}
case 'optional': {
queue.push(terminal.optional);
testBlock = fn.body.blocks.get(terminal.test)!;
break;
}
case 'logical':
case 'ternary': {
queue.push(null);
testBlock = fn.body.blocks.get(terminal.test)!;
break;
}
case 'sequence': {
// Do we need sequence?? In any case, don't push to queue bc there is no corresponding branch terminal
testBlock = fn.body.blocks.get(terminal.block)!;
break;
}
default: {
CompilerError.simpleInvariant(false, {
reason: `Unexpected terminal in optional`,
loc: terminal.loc,
});
}
}
}
CompilerError.simpleInvariant(queue.length === 0, {
reason:
'Expected a matching number of conditional blocks and branch points',
loc: block.terminal.loc,
});
}
}
return optionals;
}

View File

@@ -267,7 +267,6 @@ function validateInferredDep(
effect: Effect.Read,
reactive: false,
},
constant: false,
},
path: [...dep.path],
};
@@ -380,7 +379,6 @@ class Visitor extends ReactiveFunctionVisitor<VisitorState> {
root: {
kind: 'NamedLocal',
value: storeTarget,
constant: false,
},
path: [],
});
@@ -410,7 +408,6 @@ class Visitor extends ReactiveFunctionVisitor<VisitorState> {
root: {
kind: 'NamedLocal',
value: {...lvalue},
constant: false,
},
path: [],
});

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
const someGlobal = {value: 0};
@@ -33,7 +33,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
import { useMemo } from "react";
const someGlobal = { value: 0 };

View File

@@ -1,4 +1,4 @@
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
const someGlobal = {value: 0};

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';
import {makeObject_Primitives, ValidateMemoization} from 'shared-runtime';
@@ -36,7 +36,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @validatePreserveExistingMemoizationGuarantees
import { useMemo } from "react";
import { makeObject_Primitives, ValidateMemoization } from "shared-runtime";

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';
import {makeObject_Primitives, ValidateMemoization} from 'shared-runtime';

View File

@@ -2,7 +2,6 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies:false
import {useMemo} from 'react';
function Component(props) {
@@ -31,7 +30,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime";
import { useMemo } from "react";
function Component(props) {

View File

@@ -1,4 +1,3 @@
// @validateExhaustiveMemoizationDependencies:false
import {useMemo} from 'react';
function Component(props) {

View File

@@ -1,91 +0,0 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies
import {useMemo} from 'react';
import {ValidateMemoization} from 'shared-runtime';
function Component({x}) {
useEffect(
() => {
console.log(x);
// eslint-disable-next-line react-hooks/exhaustive-deps
},
[
/* intentionally missing deps */
]
);
const memo = useMemo(() => {
return [x];
}, [x]);
return <ValidateMemoization inputs={[x]} output={memo} />;
}
```
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateExhaustiveMemoizationDependencies
import { useMemo } from "react";
import { ValidateMemoization } from "shared-runtime";
function Component(t0) {
const $ = _c(10);
const { x } = t0;
let t1;
if ($[0] !== x) {
t1 = () => {
console.log(x);
};
$[0] = x;
$[1] = t1;
} else {
t1 = $[1];
}
let t2;
if ($[2] === Symbol.for("react.memo_cache_sentinel")) {
t2 = [];
$[2] = t2;
} else {
t2 = $[2];
}
useEffect(t1, t2);
let t3;
if ($[3] !== x) {
t3 = [x];
$[3] = x;
$[4] = t3;
} else {
t3 = $[4];
}
const memo = t3;
let t4;
if ($[5] !== x) {
t4 = [x];
$[5] = x;
$[6] = t4;
} else {
t4 = $[6];
}
let t5;
if ($[7] !== memo || $[8] !== t4) {
t5 = <ValidateMemoization inputs={t4} output={memo} />;
$[7] = memo;
$[8] = t4;
$[9] = t5;
} else {
t5 = $[9];
}
return t5;
}
```
### Eval output
(kind: exception) Fixture not implemented

View File

@@ -1,22 +0,0 @@
// @validateExhaustiveMemoizationDependencies
import {useMemo} from 'react';
import {ValidateMemoization} from 'shared-runtime';
function Component({x}) {
useEffect(
() => {
console.log(x);
// eslint-disable-next-line react-hooks/exhaustive-deps
},
[
/* intentionally missing deps */
]
);
const memo = useMemo(() => {
return [x];
}, [x]);
return <ValidateMemoization inputs={[x]} output={memo} />;
}

View File

@@ -11,7 +11,7 @@ function Component(props) {
Component = useMemo(() => {
return Component;
}, [Component]);
});
return <Component {...props} />;
}
@@ -36,7 +36,6 @@ function Component(props) {
if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
Component = Stringify;
Component;
Component = Component;
$[0] = Component;
} else {

View File

@@ -7,7 +7,7 @@ function Component(props) {
Component = useMemo(() => {
return Component;
}, [Component]);
});
return <Component {...props} />;
}

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @eslintSuppressionRules:["my-app","react-rule"] @validateExhaustiveMemoizationDependencies:false
// @eslintSuppressionRules:["my-app","react-rule"]
/* eslint-disable my-app/react-rule */
function lowercasecomponent() {
@@ -26,7 +26,7 @@ Error: React Compiler has skipped optimizing this component because one or more
React Compiler only works when your components follow all the rules of React, disabling them may result in unexpected or incorrect behavior. Found suppression `eslint-disable my-app/react-rule`.
error.bailout-on-suppression-of-custom-rule.ts:3:0
1 | // @eslintSuppressionRules:["my-app","react-rule"] @validateExhaustiveMemoizationDependencies:false
1 | // @eslintSuppressionRules:["my-app","react-rule"]
2 |
> 3 | /* eslint-disable my-app/react-rule */
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Found React rule suppression

View File

@@ -1,4 +1,4 @@
// @eslintSuppressionRules:["my-app","react-rule"] @validateExhaustiveMemoizationDependencies:false
// @eslintSuppressionRules:["my-app","react-rule"]
/* eslint-disable my-app/react-rule */
function lowercasecomponent() {

View File

@@ -1,42 +0,0 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies
import {useState} from 'react';
import {Stringify} from 'shared-runtime';
function Component() {
const [state, setState] = useState(0);
const x = useMemo(() => {
return [state];
// error: `setState` is a stable type, but not actually referenced
}, [state, setState]);
return 'oops';
}
```
## Error
```
Found 1 error:
Error: Found unnecessary memoization dependencies
Unnecessary dependencies can cause a value to update more often than necessary, causing performance regressions and effects to fire more often than expected.
error.invalid-exhaustive-deps-disallow-unused-stable-types.ts:11:5
9 | return [state];
10 | // error: `setState` is a stable type, but not actually referenced
> 11 | }, [state, setState]);
| ^^^^^^^^^^^^^^^^^ Unnecessary dependencies `setState`
12 |
13 | return 'oops';
14 | }
```

View File

@@ -1,14 +0,0 @@
// @validateExhaustiveMemoizationDependencies
import {useState} from 'react';
import {Stringify} from 'shared-runtime';
function Component() {
const [state, setState] = useState(0);
const x = useMemo(() => {
return [state];
// error: `setState` is a stable type, but not actually referenced
}, [state, setState]);
return 'oops';
}

View File

@@ -1,109 +0,0 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies
import {useMemo} from 'react';
import {Stringify} from 'shared-runtime';
function Component({x, y, z}) {
const a = useMemo(() => {
return x?.y.z?.a;
// error: too precise
}, [x?.y.z?.a.b]);
const b = useMemo(() => {
return x.y.z?.a;
// ok, not our job to type check nullability
}, [x.y.z.a]);
const c = useMemo(() => {
return x?.y.z.a?.b;
// error: too precise
}, [x?.y.z.a?.b.z]);
const d = useMemo(() => {
return x?.y?.[(console.log(y), z?.b)];
// ok
}, [x?.y, y, z?.b]);
const e = useMemo(() => {
const e = [];
e.push(x);
return e;
// ok
}, [x]);
const f = useMemo(() => {
return [];
// error: unnecessary
}, [x, y.z, z?.y?.a, UNUSED_GLOBAL]);
const ref1 = useRef(null);
const ref2 = useRef(null);
const ref = z ? ref1 : ref2;
const cb = useMemo(() => {
return () => {
return ref.current;
};
// error: ref is a stable type but reactive
}, []);
return <Stringify results={[a, b, c, d, e, f, cb]} />;
}
```
## Error
```
Found 4 errors:
Error: Found missing memoization dependencies
Missing dependencies can cause a value not to update when those inputs change, resulting in stale UI.
error.invalid-exhaustive-deps.ts:7:11
5 | function Component({x, y, z}) {
6 | const a = useMemo(() => {
> 7 | return x?.y.z?.a;
| ^^^^^^^^^ Missing dependency `x?.y.z?.a`
8 | // error: too precise
9 | }, [x?.y.z?.a.b]);
10 | const b = useMemo(() => {
Error: Found missing memoization dependencies
Missing dependencies can cause a value not to update when those inputs change, resulting in stale UI.
error.invalid-exhaustive-deps.ts:15:11
13 | }, [x.y.z.a]);
14 | const c = useMemo(() => {
> 15 | return x?.y.z.a?.b;
| ^^^^^^^^^^^ Missing dependency `x?.y.z.a?.b`
16 | // error: too precise
17 | }, [x?.y.z.a?.b.z]);
18 | const d = useMemo(() => {
Error: Found unnecessary memoization dependencies
Unnecessary dependencies can cause a value to update more often than necessary, causing performance regressions and effects to fire more often than expected.
error.invalid-exhaustive-deps.ts:31:5
29 | return [];
30 | // error: unnecessary
> 31 | }, [x, y.z, z?.y?.a, UNUSED_GLOBAL]);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Unnecessary dependencies `x`, `y.z`, `z?.y?.a`, `UNUSED_GLOBAL`
32 | const ref1 = useRef(null);
33 | const ref2 = useRef(null);
34 | const ref = z ? ref1 : ref2;
Error: Found missing memoization dependencies
Missing dependencies can cause a value not to update when those inputs change, resulting in stale UI.
error.invalid-exhaustive-deps.ts:37:13
35 | const cb = useMemo(() => {
36 | return () => {
> 37 | return ref.current;
| ^^^ Missing dependency `ref`. Refs, setState functions, and other "stable" values generally do not need to be added as dependencies, but this variable may change over time to point to different values
38 | };
39 | // error: ref is a stable type but reactive
40 | }, []);
```

View File

@@ -1,42 +0,0 @@
// @validateExhaustiveMemoizationDependencies
import {useMemo} from 'react';
import {Stringify} from 'shared-runtime';
function Component({x, y, z}) {
const a = useMemo(() => {
return x?.y.z?.a;
// error: too precise
}, [x?.y.z?.a.b]);
const b = useMemo(() => {
return x.y.z?.a;
// ok, not our job to type check nullability
}, [x.y.z.a]);
const c = useMemo(() => {
return x?.y.z.a?.b;
// error: too precise
}, [x?.y.z.a?.b.z]);
const d = useMemo(() => {
return x?.y?.[(console.log(y), z?.b)];
// ok
}, [x?.y, y, z?.b]);
const e = useMemo(() => {
const e = [];
e.push(x);
return e;
// ok
}, [x]);
const f = useMemo(() => {
return [];
// error: unnecessary
}, [x, y.z, z?.y?.a, UNUSED_GLOBAL]);
const ref1 = useRef(null);
const ref2 = useRef(null);
const ref = z ? ref1 : ref2;
const cb = useMemo(() => {
return () => {
return ref.current;
};
// error: ref is a stable type but reactive
}, []);
return <Stringify results={[a, b, c, d, e, f, cb]} />;
}

View File

@@ -2,7 +2,6 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies:false
/* eslint-disable react-hooks/rules-of-hooks */
function lowercasecomponent() {
'use forget';
@@ -24,26 +23,25 @@ Error: React Compiler has skipped optimizing this component because one or more
React Compiler only works when your components follow all the rules of React, disabling them may result in unexpected or incorrect behavior. Found suppression `eslint-disable react-hooks/rules-of-hooks`.
error.invalid-sketchy-code-use-forget.ts:2:0
1 | // @validateExhaustiveMemoizationDependencies:false
> 2 | /* eslint-disable react-hooks/rules-of-hooks */
error.invalid-sketchy-code-use-forget.ts:1:0
> 1 | /* eslint-disable react-hooks/rules-of-hooks */
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Found React rule suppression
3 | function lowercasecomponent() {
4 | 'use forget';
5 | const x = [];
2 | function lowercasecomponent() {
3 | 'use forget';
4 | const x = [];
Error: React Compiler has skipped optimizing this component because one or more React ESLint rules were disabled
React Compiler only works when your components follow all the rules of React, disabling them may result in unexpected or incorrect behavior. Found suppression `eslint-disable-next-line react-hooks/rules-of-hooks`.
error.invalid-sketchy-code-use-forget.ts:6:2
4 | 'use forget';
5 | const x = [];
> 6 | // eslint-disable-next-line react-hooks/rules-of-hooks
error.invalid-sketchy-code-use-forget.ts:5:2
3 | 'use forget';
4 | const x = [];
> 5 | // eslint-disable-next-line react-hooks/rules-of-hooks
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Found React rule suppression
7 | return <div>{x}</div>;
8 | }
9 | /* eslint-enable react-hooks/rules-of-hooks */
6 | return <div>{x}</div>;
7 | }
8 | /* eslint-enable react-hooks/rules-of-hooks */
```

View File

@@ -1,4 +1,3 @@
// @validateExhaustiveMemoizationDependencies:false
/* eslint-disable react-hooks/rules-of-hooks */
function lowercasecomponent() {
'use forget';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// Note: Everything below this is sketchy @validateExhaustiveMemoizationDependencies:false
// Note: Everything below this is sketchy
/* eslint-disable react-hooks/rules-of-hooks */
function lowercasecomponent() {
'use forget';
@@ -43,7 +43,7 @@ Error: React Compiler has skipped optimizing this component because one or more
React Compiler only works when your components follow all the rules of React, disabling them may result in unexpected or incorrect behavior. Found suppression `eslint-disable react-hooks/rules-of-hooks`.
error.invalid-unclosed-eslint-suppression.ts:2:0
1 | // Note: Everything below this is sketchy @validateExhaustiveMemoizationDependencies:false
1 | // Note: Everything below this is sketchy
> 2 | /* eslint-disable react-hooks/rules-of-hooks */
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Found React rule suppression
3 | function lowercasecomponent() {

View File

@@ -1,4 +1,4 @@
// Note: Everything below this is sketchy @validateExhaustiveMemoizationDependencies:false
// Note: Everything below this is sketchy
/* eslint-disable react-hooks/rules-of-hooks */
function lowercasecomponent() {
'use forget';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback, useRef} from 'react';
function useCustomRef() {

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback, useRef} from 'react';
function useCustomRef() {

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback, useRef} from 'react';
function useCustomRef() {

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback, useRef} from 'react';
function useCustomRef() {

View File

@@ -2,14 +2,11 @@
## Input
```javascript
import {arrayPush} from 'shared-runtime';
// @validateExhaustiveMemoizationDependencies
function Component() {
const item = [];
const foo = useCallback(
() => {
arrayPush(item, 1);
item.push(1);
}, // eslint-disable-next-line react-hooks/exhaustive-deps
[]
);
@@ -25,18 +22,18 @@ function Component() {
```
Found 1 error:
Error: Found missing memoization dependencies
Error: React Compiler has skipped optimizing this component because one or more React ESLint rules were disabled
Missing dependencies can cause a value not to update when those inputs change, resulting in stale UI.
React Compiler only works when your components follow all the rules of React, disabling them may result in unexpected or incorrect behavior. Found suppression `eslint-disable-next-line react-hooks/exhaustive-deps`.
error.sketchy-code-exhaustive-deps.ts:8:16
6 | const foo = useCallback(
7 | () => {
> 8 | arrayPush(item, 1);
| ^^^^ Missing dependency `item`
9 | }, // eslint-disable-next-line react-hooks/exhaustive-deps
10 | []
11 | );
error.sketchy-code-exhaustive-deps.ts:6:7
4 | () => {
5 | item.push(1);
> 6 | }, // eslint-disable-next-line react-hooks/exhaustive-deps
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Found React rule suppression
7 | []
8 | );
9 |
```

View File

@@ -1,11 +1,8 @@
import {arrayPush} from 'shared-runtime';
// @validateExhaustiveMemoizationDependencies
function Component() {
const item = [];
const foo = useCallback(
() => {
arrayPush(item, 1);
item.push(1);
}, // eslint-disable-next-line react-hooks/exhaustive-deps
[]
);

View File

@@ -2,7 +2,6 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies:false
/* eslint-disable react-hooks/rules-of-hooks */
function lowercasecomponent() {
const x = [];
@@ -28,13 +27,12 @@ Error: React Compiler has skipped optimizing this component because one or more
React Compiler only works when your components follow all the rules of React, disabling them may result in unexpected or incorrect behavior. Found suppression `eslint-disable react-hooks/rules-of-hooks`.
error.sketchy-code-rules-of-hooks.ts:2:0
1 | // @validateExhaustiveMemoizationDependencies:false
> 2 | /* eslint-disable react-hooks/rules-of-hooks */
error.sketchy-code-rules-of-hooks.ts:1:0
> 1 | /* eslint-disable react-hooks/rules-of-hooks */
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Found React rule suppression
3 | function lowercasecomponent() {
4 | const x = [];
5 | return <div>{x}</div>;
2 | function lowercasecomponent() {
3 | const x = [];
4 | return <div>{x}</div>;
```

View File

@@ -1,4 +1,3 @@
// @validateExhaustiveMemoizationDependencies:false
/* eslint-disable react-hooks/rules-of-hooks */
function lowercasecomponent() {
const x = [];

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @flow @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @flow @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
import {useFragment} from 'react-relay';
import LogEvent from 'LogEvent';
import {useCallback, useMemo} from 'react';

View File

@@ -1,4 +1,4 @@
// @flow @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @flow @validatePreserveExistingMemoizationGuarantees @enablePreserveExistingMemoizationGuarantees:false
import {useFragment} from 'react-relay';
import LogEvent from 'LogEvent';
import {useCallback, useMemo} from 'react';

View File

@@ -1,41 +0,0 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies
function Component() {
const x = 0;
const y = useMemo(() => {
return [x];
// x gets constant-folded but shouldn't count as extraneous,
// it was referenced in the memo block
}, [x]);
return y;
}
```
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateExhaustiveMemoizationDependencies
function Component() {
const $ = _c(1);
const x = 0;
let t0;
if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
t0 = [0];
$[0] = t0;
} else {
t0 = $[0];
}
const y = t0;
return y;
}
```
### Eval output
(kind: exception) Fixture not implemented

View File

@@ -1,11 +0,0 @@
// @validateExhaustiveMemoizationDependencies
function Component() {
const x = 0;
const y = useMemo(() => {
return [x];
// x gets constant-folded but shouldn't count as extraneous,
// it was referenced in the memo block
}, [x]);
return y;
}

View File

@@ -1,100 +0,0 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies
import {
useCallback,
useTransition,
useState,
useOptimistic,
useActionState,
useRef,
useReducer,
} from 'react';
function useFoo() {
const [s, setState] = useState();
const ref = useRef(null);
const [t, startTransition] = useTransition();
const [u, addOptimistic] = useOptimistic();
const [v, dispatch] = useReducer(() => {}, null);
const [isPending, dispatchAction] = useActionState(() => {}, null);
return useCallback(() => {
dispatch();
startTransition(() => {});
addOptimistic();
setState(null);
dispatchAction();
ref.current = true;
}, [
// intentionally adding unnecessary deps on nonreactive stable values
// to check that they're allowed
dispatch,
startTransition,
addOptimistic,
setState,
dispatchAction,
ref,
]);
}
export const FIXTURE_ENTRYPOINT = {
fn: useFoo,
params: [],
};
```
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateExhaustiveMemoizationDependencies
import {
useCallback,
useTransition,
useState,
useOptimistic,
useActionState,
useRef,
useReducer,
} from "react";
function useFoo() {
const $ = _c(1);
const [, setState] = useState();
const ref = useRef(null);
const [, startTransition] = useTransition();
const [, addOptimistic] = useOptimistic();
const [, dispatch] = useReducer(_temp, null);
const [, dispatchAction] = useActionState(_temp2, null);
let t0;
if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
t0 = () => {
dispatch();
startTransition(_temp3);
addOptimistic();
setState(null);
dispatchAction();
ref.current = true;
};
$[0] = t0;
} else {
t0 = $[0];
}
return t0;
}
function _temp3() {}
function _temp2() {}
function _temp() {}
export const FIXTURE_ENTRYPOINT = {
fn: useFoo,
params: [],
};
```
### Eval output
(kind: ok) "[[ function params=0 ]]"

View File

@@ -1,42 +0,0 @@
// @validateExhaustiveMemoizationDependencies
import {
useCallback,
useTransition,
useState,
useOptimistic,
useActionState,
useRef,
useReducer,
} from 'react';
function useFoo() {
const [s, setState] = useState();
const ref = useRef(null);
const [t, startTransition] = useTransition();
const [u, addOptimistic] = useOptimistic();
const [v, dispatch] = useReducer(() => {}, null);
const [isPending, dispatchAction] = useActionState(() => {}, null);
return useCallback(() => {
dispatch();
startTransition(() => {});
addOptimistic();
setState(null);
dispatchAction();
ref.current = true;
}, [
// intentionally adding unnecessary deps on nonreactive stable values
// to check that they're allowed
dispatch,
startTransition,
addOptimistic,
setState,
dispatchAction,
ref,
]);
}
export const FIXTURE_ENTRYPOINT = {
fn: useFoo,
params: [],
};

View File

@@ -1,201 +0,0 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies
import {useCallback, useMemo} from 'react';
import {makeObject_Primitives, Stringify} from 'shared-runtime';
function useHook1(x) {
return useMemo(() => {
return x?.y.z?.a;
}, [x?.y.z?.a]);
}
function useHook2(x) {
useMemo(() => {
return x.y.z?.a;
}, [x.y.z?.a]);
}
function useHook3(x) {
return useMemo(() => {
return x?.y.z.a?.b;
}, [x?.y.z.a?.b]);
}
function useHook4(x, y, z) {
return useMemo(() => {
return x?.y?.[(console.log(y), z?.b)];
}, [x?.y, y, z?.b]);
}
function useHook5(x) {
return useMemo(() => {
const e = [];
const local = makeObject_Primitives(x);
const fn = () => {
e.push(local);
};
fn();
return e;
}, [x]);
}
function useHook6(x) {
return useMemo(() => {
const f = [];
f.push(x.y.z);
f.push(x.y);
f.push(x);
return f;
}, [x]);
}
function useHook7(x) {
const [state, setState] = useState(true);
const f = () => {
setState(x => !x);
};
return useCallback(() => {
f();
}, [f]);
}
function Component({x, y, z}) {
const a = useHook1(x);
const b = useHook2(x);
const c = useHook3(x);
const d = useHook4(x, y, z);
const e = useHook5(x);
const f = useHook6(x);
const g = useHook7(x);
return <Stringify results={[a, b, c, d, e, f, g]} />;
}
```
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateExhaustiveMemoizationDependencies
import { useCallback, useMemo } from "react";
import { makeObject_Primitives, Stringify } from "shared-runtime";
function useHook1(x) {
x?.y.z?.a;
return x?.y.z?.a;
}
function useHook2(x) {
x.y.z?.a;
}
function useHook3(x) {
x?.y.z.a?.b;
return x?.y.z.a?.b;
}
function useHook4(x, y, z) {
x?.y;
z?.b;
return x?.y?.[(console.log(y), z?.b)];
}
function useHook5(x) {
const $ = _c(2);
let e;
if ($[0] !== x) {
e = [];
const local = makeObject_Primitives(x);
const fn = () => {
e.push(local);
};
fn();
$[0] = x;
$[1] = e;
} else {
e = $[1];
}
return e;
}
function useHook6(x) {
const $ = _c(2);
let f;
if ($[0] !== x) {
f = [];
f.push(x.y.z);
f.push(x.y);
f.push(x);
$[0] = x;
$[1] = f;
} else {
f = $[1];
}
return f;
}
function useHook7(x) {
const $ = _c(2);
const [, setState] = useState(true);
let t0;
if ($[0] === Symbol.for("react.memo_cache_sentinel")) {
t0 = () => {
setState(_temp);
};
$[0] = t0;
} else {
t0 = $[0];
}
const f = t0;
let t1;
if ($[1] === Symbol.for("react.memo_cache_sentinel")) {
t1 = () => {
f();
};
$[1] = t1;
} else {
t1 = $[1];
}
return t1;
}
function _temp(x_0) {
return !x_0;
}
function Component(t0) {
const $ = _c(8);
const { x, y, z } = t0;
const a = useHook1(x);
const b = useHook2(x);
const c = useHook3(x);
const d = useHook4(x, y, z);
const e = useHook5(x);
const f = useHook6(x);
const g = useHook7(x);
let t1;
if (
$[0] !== a ||
$[1] !== b ||
$[2] !== c ||
$[3] !== d ||
$[4] !== e ||
$[5] !== f ||
$[6] !== g
) {
t1 = <Stringify results={[a, b, c, d, e, f, g]} />;
$[0] = a;
$[1] = b;
$[2] = c;
$[3] = d;
$[4] = e;
$[5] = f;
$[6] = g;
$[7] = t1;
} else {
t1 = $[7];
}
return t1;
}
```
### Eval output
(kind: exception) Fixture not implemented

View File

@@ -1,65 +0,0 @@
// @validateExhaustiveMemoizationDependencies
import {useCallback, useMemo} from 'react';
import {makeObject_Primitives, Stringify} from 'shared-runtime';
function useHook1(x) {
return useMemo(() => {
return x?.y.z?.a;
}, [x?.y.z?.a]);
}
function useHook2(x) {
useMemo(() => {
return x.y.z?.a;
}, [x.y.z?.a]);
}
function useHook3(x) {
return useMemo(() => {
return x?.y.z.a?.b;
}, [x?.y.z.a?.b]);
}
function useHook4(x, y, z) {
return useMemo(() => {
return x?.y?.[(console.log(y), z?.b)];
}, [x?.y, y, z?.b]);
}
function useHook5(x) {
return useMemo(() => {
const e = [];
const local = makeObject_Primitives(x);
const fn = () => {
e.push(local);
};
fn();
return e;
}, [x]);
}
function useHook6(x) {
return useMemo(() => {
const f = [];
f.push(x.y.z);
f.push(x.y);
f.push(x);
return f;
}, [x]);
}
function useHook7(x) {
const [state, setState] = useState(true);
const f = () => {
setState(x => !x);
};
return useCallback(() => {
f();
}, [f]);
}
function Component({x, y, z}) {
const a = useHook1(x);
const b = useHook2(x);
const c = useHook3(x);
const d = useHook4(x, y, z);
const e = useHook5(x);
const f = useHook6(x);
const g = useHook7(x);
return <Stringify results={[a, b, c, d, e, f, g]} />;
}

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo, useState} from 'react';
import {ValidateMemoization} from 'shared-runtime';
@@ -29,7 +29,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c2 } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c2 } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
import { useMemo, useState } from "react";
import { ValidateMemoization } from "shared-runtime";

View File

@@ -1,4 +1,4 @@
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo, useState} from 'react';
import {ValidateMemoization} from 'shared-runtime';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @compilationMode:"infer" @enableResetCacheOnSourceFileChanges @validateExhaustiveMemoizationDependencies:false
// @compilationMode:"infer" @enableResetCacheOnSourceFileChanges
import {useEffect, useMemo, useState} from 'react';
import {ValidateMemoization} from 'shared-runtime';
@@ -46,7 +46,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @compilationMode:"infer" @enableResetCacheOnSourceFileChanges @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @compilationMode:"infer" @enableResetCacheOnSourceFileChanges
import { useEffect, useMemo, useState } from "react";
import { ValidateMemoization } from "shared-runtime";
@@ -63,12 +63,12 @@ function unsafeUpdateConst() {
function Component() {
const $ = _c(3);
if (
$[0] !== "36c02976ff5bc474b7510128ea8220ffe31d92cd5d245148ed0a43146d18ded4"
$[0] !== "a585d27423c1181e7b6305ff909458183d284658c3c3d2e3764e1128be302fd7"
) {
for (let $i = 0; $i < 3; $i += 1) {
$[$i] = Symbol.for("react.memo_cache_sentinel");
}
$[0] = "36c02976ff5bc474b7510128ea8220ffe31d92cd5d245148ed0a43146d18ded4";
$[0] = "a585d27423c1181e7b6305ff909458183d284658c3c3d2e3764e1128be302fd7";
}
useState(_temp);

View File

@@ -1,4 +1,4 @@
// @compilationMode:"infer" @enableResetCacheOnSourceFileChanges @validateExhaustiveMemoizationDependencies:false
// @compilationMode:"infer" @enableResetCacheOnSourceFileChanges
import {useEffect, useMemo, useState} from 'react';
import {ValidateMemoization} from 'shared-runtime';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @dynamicGating:{"source":"shared-runtime"} @validatePreserveExistingMemoizationGuarantees @panicThreshold:"none" @loggerTestOnly @validateExhaustiveMemoizationDependencies:false
// @dynamicGating:{"source":"shared-runtime"} @validatePreserveExistingMemoizationGuarantees @panicThreshold:"none" @loggerTestOnly
import {useMemo} from 'react';
import {identity} from 'shared-runtime';
@@ -30,7 +30,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
// @dynamicGating:{"source":"shared-runtime"} @validatePreserveExistingMemoizationGuarantees @panicThreshold:"none" @loggerTestOnly @validateExhaustiveMemoizationDependencies:false
// @dynamicGating:{"source":"shared-runtime"} @validatePreserveExistingMemoizationGuarantees @panicThreshold:"none" @loggerTestOnly
import { useMemo } from "react";
import { identity } from "shared-runtime";
@@ -58,7 +58,7 @@ export const FIXTURE_ENTRYPOINT = {
## Logs
```
{"kind":"CompileError","fnLoc":{"start":{"line":6,"column":0,"index":255},"end":{"line":16,"column":1,"index":482},"filename":"dynamic-gating-bailout-nopanic.ts"},"detail":{"options":{"category":"PreserveManualMemo","reason":"Existing memoization could not be preserved","description":"React Compiler has skipped optimizing this component because the existing manual memoization could not be preserved. The inferred dependencies did not match the manually specified dependencies, which could cause the value to change more or less frequently than expected. The inferred dependency was `value`, but the source dependencies were []. Inferred dependency not present in source","suggestions":null,"details":[{"kind":"error","loc":{"start":{"line":9,"column":31,"index":337},"end":{"line":9,"column":52,"index":358},"filename":"dynamic-gating-bailout-nopanic.ts"},"message":"Could not preserve existing manual memoization"}]}}}
{"kind":"CompileError","fnLoc":{"start":{"line":6,"column":0,"index":206},"end":{"line":16,"column":1,"index":433},"filename":"dynamic-gating-bailout-nopanic.ts"},"detail":{"options":{"category":"PreserveManualMemo","reason":"Existing memoization could not be preserved","description":"React Compiler has skipped optimizing this component because the existing manual memoization could not be preserved. The inferred dependencies did not match the manually specified dependencies, which could cause the value to change more or less frequently than expected. The inferred dependency was `value`, but the source dependencies were []. Inferred dependency not present in source","suggestions":null,"details":[{"kind":"error","loc":{"start":{"line":9,"column":31,"index":288},"end":{"line":9,"column":52,"index":309},"filename":"dynamic-gating-bailout-nopanic.ts"},"message":"Could not preserve existing manual memoization"}]}}}
```
### Eval output

View File

@@ -1,4 +1,4 @@
// @dynamicGating:{"source":"shared-runtime"} @validatePreserveExistingMemoizationGuarantees @panicThreshold:"none" @loggerTestOnly @validateExhaustiveMemoizationDependencies:false
// @dynamicGating:{"source":"shared-runtime"} @validatePreserveExistingMemoizationGuarantees @panicThreshold:"none" @loggerTestOnly
import {useMemo} from 'react';
import {identity} from 'shared-runtime';

View File

@@ -2,7 +2,6 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies:false
import {useState, useMemo} from 'react';
import {useIdentity} from 'shared-runtime';
@@ -37,7 +36,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime";
import { useState, useMemo } from "react";
import { useIdentity } from "shared-runtime";

View File

@@ -1,4 +1,3 @@
// @validateExhaustiveMemoizationDependencies:false
import {useState, useMemo} from 'react';
import {useIdentity} from 'shared-runtime';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @loggerTestOnly @validateExhaustiveMemoizationDependencies:false
// @loggerTestOnly
function component(a) {
let x = useMemo(() => {
mutate(a);
@@ -15,7 +15,7 @@ function component(a) {
## Code
```javascript
// @loggerTestOnly @validateExhaustiveMemoizationDependencies:false
// @loggerTestOnly
function component(a) {
mutate(a);
}
@@ -25,8 +25,8 @@ function component(a) {
## Logs
```
{"kind":"CompileError","detail":{"options":{"category":"VoidUseMemo","reason":"useMemo() callbacks must return a value","description":"This useMemo() callback doesn't return a value. useMemo() is for computing and caching values, not for arbitrary side effects","suggestions":null,"details":[{"kind":"error","loc":{"start":{"line":3,"column":18,"index":110},"end":{"line":5,"column":3,"index":136},"filename":"invalid-useMemo-return-empty.ts"},"message":"useMemo() callbacks must return a value"}]}},"fnLoc":null}
{"kind":"CompileSuccess","fnLoc":{"start":{"line":2,"column":0,"index":68},"end":{"line":7,"column":1,"index":156},"filename":"invalid-useMemo-return-empty.ts"},"fnName":"component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":1,"prunedMemoValues":0}
{"kind":"CompileError","detail":{"options":{"category":"VoidUseMemo","reason":"useMemo() callbacks must return a value","description":"This useMemo() callback doesn't return a value. useMemo() is for computing and caching values, not for arbitrary side effects","suggestions":null,"details":[{"kind":"error","loc":{"start":{"line":3,"column":18,"index":61},"end":{"line":5,"column":3,"index":87},"filename":"invalid-useMemo-return-empty.ts"},"message":"useMemo() callbacks must return a value"}]}},"fnLoc":null}
{"kind":"CompileSuccess","fnLoc":{"start":{"line":2,"column":0,"index":19},"end":{"line":7,"column":1,"index":107},"filename":"invalid-useMemo-return-empty.ts"},"fnName":"component","memoSlots":0,"memoBlocks":0,"memoValues":0,"prunedMemoBlocks":1,"prunedMemoValues":0}
```
### Eval output

View File

@@ -1,4 +1,4 @@
// @loggerTestOnly @validateExhaustiveMemoizationDependencies:false
// @loggerTestOnly
function component(a) {
let x = useMemo(() => {
mutate(a);

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {identity, ValidateMemoization} from 'shared-runtime';
@@ -33,7 +33,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
import { useMemo } from "react";
import { identity, ValidateMemoization } from "shared-runtime";

View File

@@ -1,4 +1,4 @@
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {identity, ValidateMemoization} from 'shared-runtime';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {identity, ValidateMemoization} from 'shared-runtime';
@@ -30,7 +30,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
import { useMemo } from "react";
import { identity, ValidateMemoization } from "shared-runtime";

View File

@@ -1,4 +1,4 @@
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {identity, ValidateMemoization} from 'shared-runtime';

View File

@@ -2,7 +2,6 @@
## Input
```javascript
// @validateExhaustiveMemoizationDependencies:false
export function useFormatRelativeTime(opts = {}) {
const {timeZone, minimal} = opts;
const format = useCallback(function formatWithUnit() {}, [minimal]);
@@ -22,7 +21,7 @@ export function useFormatRelativeTime(opts = {}) {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime";
export function useFormatRelativeTime(t0) {
const $ = _c(1);
const opts = t0 === undefined ? {} : t0;

View File

@@ -1,4 +1,3 @@
// @validateExhaustiveMemoizationDependencies:false
export function useFormatRelativeTime(opts = {}) {
const {timeZone, minimal} = opts;
const format = useCallback(function formatWithUnit() {}, [minimal]);

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
mutate,
@@ -50,7 +50,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
import { useMemo } from "react";
import {
mutate,

View File

@@ -1,4 +1,4 @@
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
mutate,

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
typedCapture,
@@ -43,7 +43,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
import { useMemo } from "react";
import {
typedCapture,

View File

@@ -1,4 +1,4 @@
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
typedCapture,

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
typedCapture,
@@ -41,7 +41,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
import { useMemo } from "react";
import {
typedCapture,

View File

@@ -1,4 +1,4 @@
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
typedCapture,

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
typedCapture,
@@ -37,7 +37,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
import { useMemo } from "react";
import {
typedCapture,

View File

@@ -1,4 +1,4 @@
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
typedCapture,

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
typedCapture,
@@ -41,7 +41,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enablePreserveExistingMemoizationGuarantees:false
import { useMemo } from "react";
import {
typedCapture,

View File

@@ -1,4 +1,4 @@
// @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
import {
typedCapture,

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
import {useCallback} from 'react';
import {Stringify} from 'shared-runtime';
@@ -36,7 +36,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
import { useCallback } from "react";
import { Stringify } from "shared-runtime";

View File

@@ -1,4 +1,4 @@
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
import {useCallback} from 'react';
import {Stringify} from 'shared-runtime';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
import {useCallback} from 'react';
import {Stringify} from 'shared-runtime';
@@ -31,7 +31,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
import { useCallback } from "react";
import { Stringify } from "shared-runtime";

View File

@@ -1,4 +1,4 @@
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
import {useCallback} from 'react';
import {Stringify} from 'shared-runtime';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
function useFoo(arr1, arr2) {
@@ -27,7 +27,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
import { useMemo } from "react";
function useFoo(arr1, arr2) {

View File

@@ -1,4 +1,4 @@
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false @validateExhaustiveMemoizationDependencies:false
// @enableNewMutationAliasingModel @enablePreserveExistingMemoizationGuarantees:false
import {useMemo} from 'react';
function useFoo(arr1, arr2) {

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback, useRef} from 'react';
function useFoo({cond}) {

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback, useRef} from 'react';
function useFoo({cond}) {

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
// This is technically a false positive, but source is already breaking
// `exhaustive-deps` lint rule (and can be considered invalid).

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
// This is technically a false positive, but source is already breaking
// `exhaustive-deps` lint rule (and can be considered invalid).

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback} from 'react';
function Component({propA}) {

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback} from 'react';
function Component({propA}) {

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
// This is technically a false positive, but source is already breaking
// `exhaustive-deps` lint rule (and can be considered invalid).

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
// This is technically a false positive, but source is already breaking
// `exhaustive-deps` lint rule (and can be considered invalid).

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';
function Component({propA}) {

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';
function Component({propA}) {

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';
function Component({propA}) {

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';
function Component({propA}) {

View File

@@ -32,15 +32,19 @@ function useFoo(input1) {
```
Found 1 error:
Error: Found missing memoization dependencies
Compilation Skipped: Existing memoization could not be preserved
Missing dependencies can cause a value not to update when those inputs change, resulting in stale UI.
React Compiler has skipped optimizing this component because the existing manual memoization could not be preserved. The inferred dependencies did not match the manually specified dependencies, which could cause the value to change more or less frequently than expected. The inferred dependency was `input1`, but the source dependencies were [y]. Inferred different dependency than source.
error.useMemo-unrelated-mutation-in-depslist.ts:18:14
16 | const memoized = useMemo(() => {
17 | return [y];
error.useMemo-unrelated-mutation-in-depslist.ts:16:27
14 | const x = {};
15 | const y = [input1];
> 16 | const memoized = useMemo(() => {
| ^^^^^^^
> 17 | return [y];
| ^^^^^^^^^^^^^^^
> 18 | }, [(mutate(x), y)]);
| ^ Missing dependency `x`
| ^^^^ Could not preserve existing manual memoization
19 |
20 | return [x, memoized];
21 | }

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';
function useHook(maybeRef, shouldRead) {
@@ -16,7 +16,7 @@ function useHook(maybeRef, shouldRead) {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @validatePreserveExistingMemoizationGuarantees
import { useMemo } from "react";
function useHook(maybeRef, shouldRead) {

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';
function useHook(maybeRef, shouldRead) {

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';
@@ -27,7 +27,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @validatePreserveExistingMemoizationGuarantees
import { useMemo } from "react";

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useMemo} from 'react';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback} from 'react';
@@ -21,7 +21,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
import { c as _c } from "react/compiler-runtime"; // @validatePreserveExistingMemoizationGuarantees
import { useCallback } from "react";

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback} from 'react';

View File

@@ -2,7 +2,7 @@
## Input
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback} from 'react';
import {CONST_STRING0} from 'shared-runtime';
@@ -22,7 +22,7 @@ export const FIXTURE_ENTRYPOINT = {
## Code
```javascript
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import { useCallback } from "react";
import { CONST_STRING0 } from "shared-runtime";

View File

@@ -1,4 +1,4 @@
// @validatePreserveExistingMemoizationGuarantees @validateExhaustiveMemoizationDependencies:false
// @validatePreserveExistingMemoizationGuarantees
import {useCallback} from 'react';
import {CONST_STRING0} from 'shared-runtime';

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