# from_as
Rust traits and derive macros for reading and writing files for types that implement serde.
The from_as_file crate provides two traits: FromFile and AsFile. FromFile is used for getting
types from a file. AsFile is used for writing a types to a file.
The derive_from_as crate provides derive macros for these traits with the same names.
Currently, the only files types that can be used are json, yaml, and toml.
### Example
```rust
#[macro_use]
extern crate serde_derive;
use std::io::{Read, Write};
use std::convert::TryFrom;
use from_as::*;
#[derive(Debug, Deserialize, Serialize, AsFile, FromFile)]
struct Attribute {
name: String,
}
fn main() {
let attr = Attribute {
name: "attr_name".into()
};
// Write to the example directory.
attr.as_file("./examples/attr.json").unwrap();
let attr = Attribute::from_file("./examples/attr.json").unwrap();
println!("{:#?}", attr);
// For writing a prettified version.
attr.as_file_pretty("./examples/attr.json").uwnrap();
}
```