**Description:**
This PR changes the AST node construction code to use `.into()` or `::from()` to make changing the boxed-ness of the AST node easier. I used `ast-grep` to make large changes across codebase.
**Description:**
This PR allows `ArrayLit`s to be converted to numbers in the
`cast_to_number` function. This allows expressions using arrays to be
converted to numbers. See some example expressions below that were
previously not able to be computed, but are now able to due to this
change.
```js
+[] // 0
+[[]] // 0
+[1] // 1
+[undefined] // 0
+[null] // 0
+[[1]] // 1
+[,] // 0
+[,,] // NaN
```
Regarding the implementation, arrays are converted to strings, and the
string is then parsed as a number. So arrays like `[]` and `[undefined]`
return `""` which then return `0` when parsed as a string. This is also
why arrays with more than one element can't be parsed because e.g. `[1,
2]` returns `"1,2"`. This procedure follows the ECMAScript
specification.
https://262.ecma-international.org/6.0/#sec-tonumberhttps://262.ecma-international.org/6.0/#sec-toprimitive
CI / Test - ${{ matrix.settings.crate }} - ${{ matrix.settings.os }} (map[crate:swc_plugin_runner os:windows-latest runner:windows-latest]) (push) Waiting to run
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**Description:**
- This PR introduces an in-tree testing system for Deno.
- This PR adds `stacker` cargo-feature to `swc_ecma_utils`.
**Related issue:**
- #1627
- Closes#8840
