vendor/thiserror/tests/test_error.rs

   1 #![allow(dead_code)]
   2
   3 use std::fmt::{self, Display};
   4 use std::io;
   5 use thiserror::Error;
   6
   7 macro_rules! unimplemented_display {
   8     ($ty:ty) => {
   9         impl Display for $ty {
  10             fn fmt(&self, _formatter: &mut fmt::Formatter) -> fmt::Result {
  11                 unimplemented!()
  12             }
  13         }
  14     };
  15 }
  16
  17 #[derive(Error, Debug)]
  18 struct BracedError {
  19     msg: String,
  20     pos: usize,
  21 }
  22
  23 #[derive(Error, Debug)]
  24 struct TupleError(String, usize);
  25
  26 #[derive(Error, Debug)]
  27 struct UnitError;
  28
  29 #[derive(Error, Debug)]
  30 struct WithSource {
  31     #[source]
  32     cause: io::Error,
  33 }
  34
  35 #[derive(Error, Debug)]
  36 struct WithAnyhow {
  37     #[source]
  38     cause: anyhow::Error,
  39 }
  40
  41 #[derive(Error, Debug)]
  42 enum EnumError {
  43     Braced {
  44         #[source]
  45         cause: io::Error,
  46     },
  47     Tuple(#[source] io::Error),
  48     Unit,
  49 }
  50
  51 unimplemented_display!(BracedError);
  52 unimplemented_display!(TupleError);
  53 unimplemented_display!(UnitError);
  54 unimplemented_display!(WithSource);
  55 unimplemented_display!(WithAnyhow);
  56 unimplemented_display!(EnumError);