oxc/crates/oxc_syntax
Dunqing 6f0fe38bff fix(semantic)!: correct all ReferenceFlags::Write according to the spec (#7388)
close #7323

According to the specification re-design the JavaScript-part ReferenceFlags inferring approach.

* https://tc39.es/ecma262/#sec-assignment-operators-runtime-semantics-evaluation
* https://tc39.es/ecma262/#sec-postfix-increment-operator-runtime-semantics-evaluation
* https://tc39.es/ecma262/#sec-runtime-semantics-restdestructuringassignmentevaluation
* ... See references of https://tc39.es/ecma262/#sec-putvalue

### Changes

1. The left-hand of `AssignmentExpression` is always `ReferenceFlags::Write`
```js
let a = 0;
console.log(a = 0);
            ^ Write only
```

2. The `argument` of `UpdateExpression` is always `ReferenceFlags::Read | Write`
```js
let a = 0;
a++;
^ Read and Write
```

This change might cause some trouble for `Minfier` to remove this code, because ‘a’ is not used elsewhere. I have taken a look at `esbuild` and `Terser`. Only the `Terser` can remove this code.
2024-11-22 06:08:30 +00:00
..
src fix(semantic)!: correct all ReferenceFlags::Write according to the spec (#7388) 2024-11-22 06:08:30 +00:00
Cargo.toml release(crates): v0.37.0 (#7399) 2024-11-21 22:27:55 +08:00
CHANGELOG.md release(crates): v0.37.0 (#7399) 2024-11-21 22:27:55 +08:00