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21 lines
474 B
Markdown
21 lines
474 B
Markdown
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# Ownership
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All variable bindings have a _scope_ where they are valid and it is an error to
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use a variable outside its scope:
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```rust,editable,compile_fail
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struct Point(i32, i32);
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fn main() {
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{
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let p = Point(3, 4);
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println!("x: {}", p.0);
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}
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println!("y: {}", p.1);
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}
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```
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* At the end of the scope, the variable is _dropped_ and the data is freed.
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* A destructor can run here to free up resources.
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* We say that the variable _owns_ the value.
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