File: issue-98299.rs

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rustc 1.85.0%2Bdfsg3-1
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use std::convert::TryFrom;

pub fn test_usage(p: ()) {
    SmallCString::try_from(p).map(|cstr| cstr);
    //~^ ERROR: type annotations needed
    //~| ERROR: type annotations needed
    //~| ERROR: type annotations needed
}

pub struct SmallCString<const N: usize> {}

impl<const N: usize> TryFrom<()> for SmallCString<N> {
    type Error = ();

    fn try_from(path: ()) -> Result<Self, Self::Error> {
        unimplemented!();
    }
}

fn main() {}