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Update box-recursive.md (#360)

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Charisee Chiw 2023-02-09 12:49:00 -08:00 committed by GitHub
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src/std/box-recursive.md
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@ -32,10 +32,12 @@ fn main() {
<details> <details>
If the `Box` was not used here and we attempted to embed a `List` directly into the `List`, * If the `Box` was not used here and we attempted to embed a `List` directly into the `List`,
the compiler would not compute a fixed size of the struct in memory, it would look infinite. the compiler would not compute a fixed size of the struct in memory, it would look infinite.
`Box` solves this problem as it has the same size as a regular pointer and just points at the next * `Box` solves this problem as it has the same size as a regular pointer and just points at the next
element of the `List` in the heap. element of the `List` in the heap.
* Remove the `Box` in the List definition and show the compiler error. `Recursive with indirection` is a hint you might want to use a Box or reference of some kind, instead of storing a value directly.
</details> </details>