# Pipe Trait
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Make it possible to chain regular functions.
## APIs
By adding `use pipe_trait::*`, 9 methods are added to all types:
| `Pipe::pipe` | `x.pipe(f)` | `f(x)` |
| `Pipe::pipe_ref` | `x.pipe_ref(f)` | `f(&x)` |
| `Pipe::pipe_mut` | `x.pipe_mut(f)` | `f(&mut x)` |
| `Pipe::pipe_as_ref` | `x.pipe_as_ref(f)` | `f(x.as_ref())` |
| `Pipe::pipe_as_mut` | `x.pipe_as_mut(f)` | `f(x.as_mut())` |
| `Pipe::pipe_deref` | `x.pipe_deref(f)` | `f(&x)` |
| `Pipe::pipe_deref_mut` | `x.pipe_deref_mut(f)` | `f(&mut x)` |
| `Pipe::pipe_borrow` | `x.pipe_borrow(f)` | `f(x.borrow())` |
| `Pipe::pipe_borrow_mut` | `x.pipe_borrow_mut(f)` | `f(x.borrow_mut())` |
Read [the docs](https://docs.rs/pipe-trait) for more information.
## Usage Examples
### Same type
```rust
use pipe_trait::*;
let square = |x| x * x;
let a = (123i32).pipe(inc).pipe(double).pipe(square);
let b = square(double(inc(123i32)));
assert_eq!(a, b);
```
### Type transformation
```rust
use pipe_trait::*;
let x = 'x';
let a = x
.pipe(|x| (x, x, x)) // (char, char, char)
.pipe(|x| [x, x]) // [(char, char, char); 2]
.pipe(|x| format!("{:?}", x)); // String
let b = "[('x', 'x', 'x'), ('x', 'x', 'x')]";
assert_eq!(a, b);
```
### Pipe amongst method chain
```rust
use pipe_trait::*;
fn log<X: Debug>(x: X) -> X {
println!("value: {:?}", x);
x
}
my_future
.pipe(log)
.await
.pipe(log)
.inc()
.pipe(log)
.double()
.pipe(log)
.square()
.pipe(log)
.get()
.pipe(log);
```
### Explicit type annotation
```rust
use pipe_trait::*;
let x = "abc".to_string();
let a = x
.pipe_ref::<&str, _>(AsRef::as_ref)
.chars()
.pipe::<Box<_>, _>(Box::new)
.collect::<Vec<_>>();
let b = vec!['a', 'b', 'c'];
assert_eq!(a, b);
```
## License
[MIT](https://git.io/JfgHW) © [Hoàng Văn Khải](https://ksxgithub.github.io/)