A macro to clone variables into the current scope shadowing old ones.
If you run into any issues or need help with using shadow-clone in your project please email incoming+efunb-shadow-clone-12722979-issue-@incoming.gitlab.com.
Add
toml
shadow-clone = "0.1"
to your cargo.toml under [dependencies] and add
rust
use shadow_clone::shadow_clone;
to your main file.
rust,compile_fail
let s = "foo".to_string();
let c = move |x: i32| format!("{}{}", s, x);
let bar = s;
This will not compile as s has been moved into the closure.
This issue can be solved with this macro.
rust
use shadow_clone::shadow_clone;
let s = "foo".to_string();
{
shadow_clone!(s);
let c = move |x: i32| format!("{}{}", s, x);
}
let bar = s;
That expands to,
rust
use shadow_clone::shadow_clone;
let s = "foo".to_string();
{
let s = s.clone();
let c = move |x: i32| format!("{}{}", s, x);
}
let bar = s;
You can also clone multiple variables separated by commas. shadow_clone!(foo, bar);
You can also bind a clone as mutable by prefixing with (mut). shadow_clone!((mut) foo);
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