opt_args 0.1.0

Create macros for functions and structs with default values
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

# opt_args: Optional arguments for functions and structs in Rust


This crate allows you to auto-generate macros to call functions and instantiate structs with default named arguments

Import the macro and use it on a function or struct like this
```rust
use opt_args::opt_args;


#[opt_args(c = "default", d, e)]

fn f(a: i32, b: u64, c: &str, d: (i32, ), e: Option<[f64; 42]>) {
    println!("a = {}, b = {}, c = {}, d = {:?}, e = {:?}", a, b, c, d, e);
}


#[derive(Debug)]

#[opt_args(y = 1, z, next)]

struct S {
    pub x: i32,
    y: i32,
    z: i32,
    next: Option<Box<S>>,
}
```
To auto-generate macros that can be used like this
```rust
fn main() {
    f!(1, 2, d = (1,));
    println!("{:#?}", S!(4, z = 5));
}
```

Full documentation [here](https://docs.rs/opt_args/latest/opt_args/)