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26 lines
1.1 KiB
26 lines
1.1 KiB
3 years ago
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## 生命周期消除
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```rust
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fn print(s: &str); // elided
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fn print<'a>(s: &'a str); // expanded
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fn debug(lvl: usize, s: &str); // elided
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fn debug<'a>(lvl: usize, s: &'a str); // expanded
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fn substr(s: &str, until: usize) -> &str; // elided
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fn substr<'a>(s: &'a str, until: usize) -> &'a str; // expanded
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fn get_str() -> &str; // ILLEGAL
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fn frob(s: &str, t: &str) -> &str; // ILLEGAL
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fn get_mut(&mut self) -> &mut T; // elided
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fn get_mut<'a>(&'a mut self) -> &'a mut T; // expanded
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fn args<T: ToCStr>(&mut self, args: &[T]) -> &mut Command // elided
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fn args<'a, 'b, T: ToCStr>(&'a mut self, args: &'b [T]) -> &'a mut Command // expanded
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fn new(buf: &mut [u8]) -> BufWriter; // elided
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fn new(buf: &mut [u8]) -> BufWriter<'_>; // elided (with `rust_2018_idioms`)
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fn new<'a>(buf: &'a mut [u8]) -> BufWriter<'a> // expanded
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```
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