A Rust macro to part of the log facade that auto generates loggings for functions output.
Add this to your Cargo.toml:
toml
[dependencies]
log-derive = "0.2"
and for Rust Edition 2015 add this to your crate root:
```rust
extern crate logderive;
In Rust Edition 2018 you can simply do:
rust
use logderive::logfn;
```
After that all you need is to add the macro above a function that returns an output that implements the Debug trait.
```rust #[logfn(Err = "Error", fmt = "Failed Sending Packet: {:?}")] fn send_hi(addr: SocketAddr) -> Result<(), io::Error> { let mut stream = TcpStream::connect(addr)?; stream.write(b"Hi!")?; Ok( () ) }
```
```rust
fn testlog(a: u8) -> String { (a*2).tostring() }
```