These proc macros help you to implement the envir::Serialize and
envir::Deserialize traits.
By default, these macro use the uppercase field name as environment variable name.
```rust use envir::Deserialize;
struct Config { home: String, }
let config = Config::from_env(); dbg!(config); ```
bash
$ cargo run
[src/main.rs:12] config = Ok(
Config {
home: "/home/sanpi",
}
)
prefix: sets this attributes to add this prefix at the field name.```rust use envir::Deserialize;
struct Config { dir: String, }
let config = Config::from_env(); dbg!(config); ```
bash
$ export APP_DIR=~/.config/app
$ cargo run
[src/main.rs:12] config = Ok(
Config {
dir: "/home/sanpi/.config/app",
}
)
name: use this name for the environment variable instead of the name of the
field. If prefix is defined, it also prepend to this name;export_with: use this function to export this field. The given function must
be callable as fn (T) -> HashMap<String, String>;load_with: use this function to load this field. The given function must
be callable as fn (Hashmap<String, String>) -> envir::Result<T>;noprefix: doesn’t add the prefix for this field;nested: this field should be de/serialized recursively.```rust use envir::Deserialize;
struct Config { dir: String, }
let config = Config::from_env(); dbg!(config); ```
bash
$ export APP_DIR=~/.config/app
$ cargo run
[src/main.rs:12] config = Ok(
Config {
dir: "/home/sanpi/.config/app",
}
)