# c-arrow
This Rust library allows you to use the arrow operator `->` to access the field of the row pointer, just like C/C++.
## Usage
`pt![`\<link\>`]`

get a mutable reference of the pointed field.

`pt![`\<link\> `=` \<expression\>`];`

assign expression to the pointed field.

`pt![`\<link\> `=` \<link\>`];`

assign the pointed field to the other pointed field.

### Explanation
| Objects | Explanations |
| :---:    | :---- |
| \<func\> | A function returning the `*mut` pointer of a struct.               |
| \<met\>  | A method which returns the `*mut` pointer of a struct.             |
| \<ptr\>`->`\<field\>   | Dereferences and accesses the field.                    |
| \<struct\>`.`\<field\> | Accesses the field directly.                           |
| \<link\> | (\<func\> \| \<ptr\> \| \<struct\>) ((`->` \| `.`)(\<field\> \| \<met\>))+ |

## Example
```rust
let mut stack: Stack<char> = Stack::new();
"abcdefgh"
    .chars()
    .for_each(|c| stack.push(c));

use c_arrow::{ pt, ref_pt };
let top_back = pt![stack.top->back];
pt![back_of(top_back)->back->data = 'x'];
pt![stack.top->backs(4)->data = stack.back_of_top()->data];
```