rust/compiler/rustc_middle/src/traits/structural_impls.rs

use crate::traits;

use std::fmt;

// Structural impls for the structs in `traits`.

impl<'tcx, N: fmt::Debug> fmt::Debug for traits::ImplSource<'tcx, N> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            super::ImplSource::UserDefined(v) => write!(f, "{v:?}"),

            super::ImplSource::Builtin(source, d) => {
                write!(f, "Builtin({source:?}, {d:?})")
            }

            super::ImplSource::Param(ct, n) => {
                write!(f, "ImplSourceParamData({n:?}, {ct:?})")
            }
        }
    }
}

impl<'tcx, N: fmt::Debug> fmt::Debug for traits::ImplSourceUserDefinedData<'tcx, N> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(
            f,
            "ImplSourceUserDefinedData(impl_def_id={:?}, args={:?}, nested={:?})",
            self.impl_def_id, self.args, self.nested
        )
    }
}