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Set the correct element type in vector (#2500)

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TalonsLee 2024-12-12 23:02:54 +08:00 committed by GitHub
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src/smart-pointers/trait-objects.md
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@ -48,34 +48,34 @@ Memory layout after allocating `pets`:
```bob ```bob
Stack Heap Stack Heap
.- - - - - - - - - - - - - -. .- - - - - - - - - - - - - - - - - - - - - - -. .- - - - - - - - - - - - - - - -. .- - - - - - - - - - - - - - - - - - - - - - -.
: : : : : : : :
: "pets: Vec<dyn Pet>" : : "data: Cat" +----+----+----+----+ : : "pets: Vec<Box<dyn Pet>>" : : "data: Cat" +----+----+----+----+ :
: +-----------+-------+ : : +-------+-------+ | F | i | d | o | : : +-----------+-------+ : : +-------+-------+ | F | i | d | o | :
: | ptr | o---+---+--. : | lives | 9 | +----+----+----+----+ : : | ptr | o---+-------+--. : | lives | 9 | +----+----+----+----+ :
: | len | 2 | : | : +-------+-------+ ^ : : | len | 2 | : | : +-------+-------+ ^ :
: | capacity | 2 | : | : ^ | : : | capacity | 2 | : | : ^ | :
: +-----------+-------+ : | : | '-------. : : +-----------+-------+ : | : | '-------. :
: : | : | data:"Dog"| : : : | : | data:"Dog"| :
: : | : | +-------+--|-------+ : : : | : | +-------+--|-------+ :
`- - - - - - - - - - - - - -' | : +---|-+-----+ | name | o, 4, 4 | : `- - - - - - - - - - - - - - - -' | : +---|-+-----+ | name | o, 4, 4 | :
`--+-->| o o | o o-|----->| age | 5 | : `--+-->| o o | o o-|----->| age | 5 | :
: +-|---+-|---+ +-------+----------+ : : +-|---+-|---+ +-------+----------+ :
: | | : : | | :
`- - -| - - |- - - - - - - - - - - - - - - - -' `- - -| - - |- - - - - - - - - - - - - - - - -'
| | | |
| | "Program text" | | "Program text"
.- - -| - - |- - - - - - - - - - - - - - - - -. .- - -| - - |- - - - - - - - - - - - - - - - -.
: | | vtable : : | | vtable :
: | | +----------------------+ : : | | +----------------------+ :
: | `----->| "<Dog as Pet>::talk" | : : | `----->| "<Dog as Pet>::talk" | :
: | +----------------------+ : : | +----------------------+ :
: | vtable : : | vtable :
: | +----------------------+ : : | +----------------------+ :
: '----------->| "<Cat as Pet>::talk" | : : '----------->| "<Cat as Pet>::talk" | :
: +----------------------+ : : +----------------------+ :
: : : :
'- - - - - - - - - - - - - - - - - - - - - - -' '- - - - - - - - - - - - - - - - - - - - - - -'
``` ```
<details> <details>