Creating Args from owned values slice

Hi,
I have a (for simplicity) `&[(String, String)]`, where first String corresponds to `Args::name` and the second String corresponds to `Args::Value` (of type `Value::Str`). How do I convert this to the `Args` struct? I can't get around the `pub prev: Option<&'a Args<'a>>` reference hell in the `Args` struct.

That is, I need to implement

```rust
fn to_args(args: &[(String, String)]) -> Args {
unimplemented!()
}
```

Any idea? Thank you.

Edit: It does not need to actually be a function. I'll use the resulting args to format the message immediately, so if there's a way to produce the Args inline, I'd be happy with that as well.