# automapper
A convention based object-object mapper for Rust. This uses Json rustdoc generated by `cargo doc`.
## Usage
### Step 1: Generate `rustdoc.json` using `automapper-cli`.
```bash
# instal
cargo install --locked automapper-cli
# generate rustdoc.json in the root of a crate where you plan to use automapper
automapper-cli .
```
### Step 2: Use `automapper` in your crate.
Define some types and use `automapper` to map between them.
```rust
// some types
pub struct SourceStruct {
pub a: i32,
pub b: u32,
pub s: String,
}
pub struct DestStruct {
pub a: i32,
pub b: u32,
pub s: String,
}
```
Use `automapper` using auto implemented trait [AutoMapsTo] and [AutoMapsFrom]
```no_run
automapper::map!(SourceStruct, DestStruct);
use automapper::{AutoMapsFrom, AutoMapsTo};
let input = SourceStruct { .. };
let output = DestStruct::map_from(input); // using AutoMapsFrom trait
let output: DestStruct = input.map_into(); // using AutoMapsTo trait
let output = input.map_into(); // using AutoMapsTo trait (type annotation isn't necessary)
```
Or, Use `automapper` to generate mapping function
```no_run
automapper::impl_map_fn!{
fn convert_to(SourceStruct -> DestStruct);
}
// this generates `convert_to` function like this
// fn convert_to(value: SourceStruct) -> DestStruct { .. }
let input = SourceStruct { .. };
let output = convert_to(input);
// output is DestStruct { .. }
```