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// This code exercises the surface area that we expect of the Error generic
// member access API. If the current toolchain is able to compile it, then
// anyhow is able to provide backtrace support.
#![feature(error_generic_member_access)]
use std::backtrace::Backtrace;
use std::error::{self, Error, Request};
use std::fmt::{self, Debug, Display};
struct MyError(Thing);
struct Thing;
impl Debug for MyError {
fn fmt(&self, _formatter: &mut fmt::Formatter) -> fmt::Result {
unimplemented!()
}
}
impl Display for MyError {
fn fmt(&self, _formatter: &mut fmt::Formatter) -> fmt::Result {
unimplemented!()
}
}
impl Error for MyError {
fn provide<'a>(&'a self, request: &mut Request<'a>) {
request.provide_ref(&self.0);
}
}
const _: fn(&dyn Error) -> Option<&Backtrace> = |err| error::request_ref::<Backtrace>(err);
// Include in sccache cache key.
const _: Option<&str> = option_env!("RUSTC_BOOTSTRAP");
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