colonbuilder 0.1.0

A rust builder offers from_str method to build struct from colon separate string.
Documentation 
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# Colon Builder
Build structure from colon separate fields like
```
name:colon builder
hobbies: book,game,football
TV: once a while
```
Sample code
```rust
#[derive(ColonBuilder)]
struct Person {
    #[cb(require)]
    name: String,
    hobbies: Vec<String>,
    #[cb(abbr="TV")]
    favoriteTVShows: Option<String>
}

let p = Person::from_str("name:lu\nTV:show");

```


`cargo expand --test p ` to expand the test file `p.rs`