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3 Commits

13 changed files with 331 additions and 191 deletions

View File

@@ -18,7 +18,9 @@ import {
CallExpression,
Instruction,
isUseStateType,
isUseRefType,
} from '../HIR';
import {printInstruction} from '../HIR/PrintHIR';
import {eachInstructionLValue, eachInstructionOperand} from '../HIR/visitors';
import {isMutable} from '../ReactiveScopes/InferReactiveScopeVariables';
import {assertExhaustive} from '../Utils/utils';
@@ -275,6 +277,7 @@ function validateEffect(
sourceIds: Set<IdentifierId>;
}> = [];
const globals: Set<IdentifierId> = new Set();
for (const block of effectFunction.body.blocks.values()) {
for (const pred of block.preds) {
if (!seenBlocks.has(pred)) {
@@ -284,6 +287,11 @@ function validateEffect(
}
for (const instr of block.instructions) {
// Early return if any instruction is deriving a value from a ref
if (isUseRefType(instr.lvalue.identifier)) {
return;
}
if (
instr.value.kind === 'CallExpression' &&
isSetStateType(instr.value.callee.identifier) &&
@@ -300,6 +308,29 @@ function validateEffect(
sourceIds: argMetadata.sourcesIds,
});
}
} else if (instr.value.kind === 'CallExpression') {
const calleeMetadata = derivationCache.get(
instr.value.callee.identifier.id,
);
if (
calleeMetadata !== undefined &&
(calleeMetadata.typeOfValue === 'fromProps' ||
calleeMetadata.typeOfValue === 'fromPropsAndState')
) {
// If the callee is a prop we can't confidently say that it should be derived in render
return;
}
if (globals.has(instr.value.callee.identifier.id)) {
// If the callee is a global we can't confidently say that it should be derived in render
return;
}
} else if (instr.value.kind === 'LoadGlobal') {
globals.add(instr.lvalue.identifier.id);
for (const operand of eachInstructionOperand(instr)) {
globals.add(operand.identifier.id);
}
}
}
seenBlocks.add(block.id);

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@@ -0,0 +1,73 @@
## Input
```javascript
// @validateNoDerivedComputationsInEffects
import {useEffect, useState, useRef} from 'react';
export default function Component({test}) {
const [local, setLocal] = useState('');
const myRef = useRef(null);
useEffect(() => {
setLocal(myRef.current + test);
}, [test]);
return <>{local}</>;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{test: 'testString'}],
};
```
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateNoDerivedComputationsInEffects
import { useEffect, useState, useRef } from "react";
export default function Component(t0) {
const $ = _c(5);
const { test } = t0;
const [local, setLocal] = useState("");
const myRef = useRef(null);
let t1;
let t2;
if ($[0] !== test) {
t1 = () => {
setLocal(myRef.current + test);
};
t2 = [test];
$[0] = test;
$[1] = t1;
$[2] = t2;
} else {
t1 = $[1];
t2 = $[2];
}
useEffect(t1, t2);
let t3;
if ($[3] !== local) {
t3 = <>{local}</>;
$[3] = local;
$[4] = t3;
} else {
t3 = $[4];
}
return t3;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{ test: "testString" }],
};
```
### Eval output
(kind: ok) nulltestString

View File

@@ -0,0 +1,75 @@
## Input
```javascript
// @validateNoDerivedComputationsInEffects
import {useEffect, useState} from 'react';
function Component({propValue, onChange}) {
const [value, setValue] = useState(null);
useEffect(() => {
setValue(propValue);
onChange();
}, [propValue]);
return <div>{value}</div>;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{propValue: 'test', onChange: () => {}}],
};
```
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateNoDerivedComputationsInEffects
import { useEffect, useState } from "react";
function Component(t0) {
const $ = _c(7);
const { propValue, onChange } = t0;
const [value, setValue] = useState(null);
let t1;
if ($[0] !== onChange || $[1] !== propValue) {
t1 = () => {
setValue(propValue);
onChange();
};
$[0] = onChange;
$[1] = propValue;
$[2] = t1;
} else {
t1 = $[2];
}
let t2;
if ($[3] !== propValue) {
t2 = [propValue];
$[3] = propValue;
$[4] = t2;
} else {
t2 = $[4];
}
useEffect(t1, t2);
let t3;
if ($[5] !== value) {
t3 = <div>{value}</div>;
$[5] = value;
$[6] = t3;
} else {
t3 = $[6];
}
return t3;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{ propValue: "test", onChange: () => {} }],
};
```
### Eval output
(kind: ok) <div>test</div>

View File

@@ -0,0 +1,70 @@
## Input
```javascript
// @validateNoDerivedComputationsInEffects
import {useEffect, useState} from 'react';
function Component({propValue}) {
const [value, setValue] = useState(null);
useEffect(() => {
setValue(propValue);
globalCall();
}, [propValue]);
return <div>{value}</div>;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{propValue: 'test'}],
};
```
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateNoDerivedComputationsInEffects
import { useEffect, useState } from "react";
function Component(t0) {
const $ = _c(5);
const { propValue } = t0;
const [value, setValue] = useState(null);
let t1;
let t2;
if ($[0] !== propValue) {
t1 = () => {
setValue(propValue);
globalCall();
};
t2 = [propValue];
$[0] = propValue;
$[1] = t1;
$[2] = t2;
} else {
t1 = $[1];
t2 = $[2];
}
useEffect(t1, t2);
let t3;
if ($[3] !== value) {
t3 = <div>{value}</div>;
$[3] = value;
$[4] = t3;
} else {
t3 = $[4];
}
return t3;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{ propValue: "test" }],
};
```
### Eval output
(kind: exception) globalCall is not defined

View File

@@ -1,45 +0,0 @@
## Input
```javascript
// @validateNoDerivedComputationsInEffects
import {useEffect, useState, useRef} from 'react';
export default function Component({test}) {
const [local, setLocal] = useState('');
const myRef = useRef(null);
useEffect(() => {
setLocal(myRef.current + test);
}, [test]);
return <>{local}</>;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{test: 'testString'}],
};
```
## Error
```
Found 1 error:
Error: Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
error.derived-state-from-ref-and-state-no-error.ts:10:4
8 |
9 | useEffect(() => {
> 10 | setLocal(myRef.current + test);
| ^^^^^^^^ Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
11 | }, [test]);
12 |
13 | return <>{local}</>;
```

View File

@@ -1,43 +0,0 @@
## Input
```javascript
// @validateNoDerivedComputationsInEffects
import {useEffect, useState} from 'react';
function Component({propValue, onChange}) {
const [value, setValue] = useState(null);
useEffect(() => {
setValue(propValue);
onChange();
}, [propValue]);
return <div>{value}</div>;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{propValue: 'test', onChange: () => {}}],
};
```
## Error
```
Found 1 error:
Error: Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
error.effect-contains-prop-function-call-no-error.ts:7:4
5 | const [value, setValue] = useState(null);
6 | useEffect(() => {
> 7 | setValue(propValue);
| ^^^^^^^^ Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
8 | onChange();
9 | }, [propValue]);
10 |
```

View File

@@ -1,43 +0,0 @@
## Input
```javascript
// @validateNoDerivedComputationsInEffects
import {useEffect, useState} from 'react';
function Component({propValue}) {
const [value, setValue] = useState(null);
useEffect(() => {
setValue(propValue);
globalCall();
}, [propValue]);
return <div>{value}</div>;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{propValue: 'test'}],
};
```
## Error
```
Found 1 error:
Error: Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
error.effect-with-global-function-call-no-error.ts:7:4
5 | const [value, setValue] = useState(null);
6 | useEffect(() => {
> 7 | setValue(propValue);
| ^^^^^^^^ Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
8 | globalCall();
9 | }, [propValue]);
10 |
```

View File

@@ -1,60 +0,0 @@
## Input
```javascript
// @validateNoDerivedComputationsInEffects
import {useEffect, useState, useRef} from 'react';
export default function Component({test}) {
const [local, setLocal] = useState(0);
const myRef = useRef(null);
useEffect(() => {
if (myRef.current) {
setLocal(test);
} else {
setLocal(test + test);
}
}, [test]);
return <>{local}</>;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{test: 4}],
};
```
## Error
```
Found 2 errors:
Error: Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
error.ref-conditional-in-effect-no-error.ts:11:6
9 | useEffect(() => {
10 | if (myRef.current) {
> 11 | setLocal(test);
| ^^^^^^^^ Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
12 | } else {
13 | setLocal(test + test);
14 | }
Error: Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
error.ref-conditional-in-effect-no-error.ts:13:6
11 | setLocal(test);
12 | } else {
> 13 | setLocal(test + test);
| ^^^^^^^^ Values derived from props and state should be calculated during render, not in an effect. (https://react.dev/learn/you-might-not-need-an-effect#updating-state-based-on-props-or-state)
14 | }
15 | }, [test]);
16 |
```

View File

@@ -0,0 +1,82 @@
## Input
```javascript
// @validateNoDerivedComputationsInEffects
import {useEffect, useState, useRef} from 'react';
export default function Component({test}) {
const [local, setLocal] = useState(0);
const myRef = useRef(null);
useEffect(() => {
if (myRef.current) {
setLocal(test);
} else {
setLocal(test + test);
}
}, [test]);
return <>{local}</>;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{test: 4}],
};
```
## Code
```javascript
import { c as _c } from "react/compiler-runtime"; // @validateNoDerivedComputationsInEffects
import { useEffect, useState, useRef } from "react";
export default function Component(t0) {
const $ = _c(5);
const { test } = t0;
const [local, setLocal] = useState(0);
const myRef = useRef(null);
let t1;
let t2;
if ($[0] !== test) {
t1 = () => {
if (myRef.current) {
setLocal(test);
} else {
setLocal(test + test);
}
};
t2 = [test];
$[0] = test;
$[1] = t1;
$[2] = t2;
} else {
t1 = $[1];
t2 = $[2];
}
useEffect(t1, t2);
let t3;
if ($[3] !== local) {
t3 = <>{local}</>;
$[3] = local;
$[4] = t3;
} else {
t3 = $[4];
}
return t3;
}
export const FIXTURE_ENTRYPOINT = {
fn: Component,
params: [{ test: 4 }],
};
```
### Eval output
(kind: ok) 8