Rust statically resolved dependency injection library
Register an statically resolved service expression indexed by key.
```rust use sdi::{inject, provide};
struct A;
impl A { pub fn new() -> A { A } provide!(A <- A::new()); }
assert_eq!(A::new(), inject!(A))
Provide by inject is also ok.
rust
use sdi::{inject, provide};
struct A; provide!(A <- A);
struct B(A);
impl B { pub fn new(a:A) -> B { B(a) } provide!(B <- B::new(inject!(A))); }
assert_eq!(B::new(A), inject!(B)) ```
Get an statically resolved service expression by key.
```rust use sdi::{inject, provide};
struct A;
impl A { pub fn new() -> A { A } provide!(A <- A::new()); }
assert_eq!(A::new(), inject!(A)) ```