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3 years ago
## Raw identifiers
Rust因为版本更迭原因可能会新增一些`关键字`,这些新增关键字可能会导致旧的函数名调用不再通过编译例如在Rust Edition 2015中引入了新的关键字`try`.
运行以下代码:
```rust
extern crate foo;
fn main() {
foo::try();
}
```
将获得下面的错误
```rust
error: expected identifier, found keyword `try`
--> src/main.rs:4:4
|
4 | foo::try();
| ^^^ expected identifier, found keyword
```
可以用Raw identifier来解决:
```rust
extern crate foo;
fn main() {
foo::r#try();
}
```