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Merge pull request #334 from dtolnay/probe
Move probe.rs out of build script string literal into file
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Original file line number | Diff line number | Diff line change |
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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. | ||
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#![feature(error_generic_member_access)] | ||
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use std::backtrace::Backtrace; | ||
use std::error::{self, Error, Request}; | ||
use std::fmt::{self, Debug, Display}; | ||
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struct MyError(Thing); | ||
struct Thing; | ||
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impl Debug for MyError { | ||
fn fmt(&self, _formatter: &mut fmt::Formatter) -> fmt::Result { | ||
unimplemented!() | ||
} | ||
} | ||
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impl Display for MyError { | ||
fn fmt(&self, _formatter: &mut fmt::Formatter) -> fmt::Result { | ||
unimplemented!() | ||
} | ||
} | ||
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impl Error for MyError { | ||
fn provide<'a>(&'a self, request: &mut Request<'a>) { | ||
request.provide_ref(&self.0); | ||
} | ||
} | ||
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const _: fn(&dyn Error) -> Option<&Backtrace> = |err| error::request_ref::<Backtrace>(err); |