crate_interface

Provides a way to define an interface (trait) in a crate, but can implement or use it in any crate. It 's usually used to solve the problem of circular dependencies between crates.

Example

```rust // Define the interface

[crateinterface::definterface]

pub trait HelloIf { fn hello(&self, name: &str, id: usize) -> String; }

// Implement the interface in any crate struct HelloIfImpl;

[crateinterface::implinterface]

impl HelloIf for HelloIfImpl { fn hello(&self, name: &str, id: usize) -> String { format!("Hello, {} {}!", name, id) } }

// Call HelloIfImpl::hello in any crate use crateinterface::callinterface; asserteq!( callinterface!(HelloIf::hello("world", 123)), "Hello, world 123!" ); asserteq!( callinterface!(HelloIf::hello, "rust", 456), // another calling style "Hello, rust 456!" ); ```