extern crate numeric_literals;

use numeric_literals::replace_numeric_literals;
use std::convert::TryFrom;
use std::fmt::Debug;
use std::ops::Div;

#[replace_numeric_literals(T::from(literal))]
fn test<T>() -> T
where
    T: From<i8> + Div<Output = T>,
{
    3 / 2 / 2
}

#[replace_numeric_literals(T::try_from(literal).expect("Must fit"))]
fn test2<T>() -> T
where
    T: TryFrom<i8> + Div<Output = T>,
    <T as TryFrom<i8>>::Error: Debug,
{
    3 / 2 / 2
}

#[replace_numeric_literals(T::try_from(literal).map_err(|_| ())?)]
fn test3<T>() -> Result<T, ()>
where
    T: TryFrom<i8> + Div<Output = T>,
{
    let res = 3 / 2 / 2;
    Ok(res)
}

#[replace_numeric_literals(f32::from(literal))]
pub trait A {}

#[allow(dead_code)]
struct B;

#[replace_numeric_literals(literal)]
impl B {}

fn main() {
    println!("{}", test::<f64>());
    println!("{}", test2::<f64>());
    println!("{}", test3::<f64>().unwrap());
}