1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186
|
#![allow(clippy::needless_late_init, clippy::uninlined_format_args)]
use core::fmt::{self, Debug, Display};
use thiserror::Error;
pub struct NoFormat;
#[derive(Debug)]
pub struct DebugOnly;
pub struct DisplayOnly;
impl Display for DisplayOnly {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("display only")
}
}
#[derive(Debug)]
pub struct DebugAndDisplay;
impl Display for DebugAndDisplay {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("debug and display")
}
}
// Should expand to:
//
// impl<E> Display for EnumDebugField<E>
// where
// E: Debug;
//
// impl<E> Error for EnumDebugField<E>
// where
// Self: Debug + Display;
//
#[derive(Error, Debug)]
pub enum EnumDebugGeneric<E> {
#[error("{0:?}")]
FatalError(E),
}
// Should expand to:
//
// impl<E> Display for EnumFromGeneric<E>;
//
// impl<E> Error for EnumFromGeneric<E>
// where
// EnumDebugGeneric<E>: Error + 'static,
// Self: Debug + Display;
//
#[derive(Error, Debug)]
pub enum EnumFromGeneric<E> {
#[error("enum from generic")]
Source(#[from] EnumDebugGeneric<E>),
}
// Should expand to:
//
// impl<HasDisplay, HasDebug, HasNeither> Display
// for EnumCompound<HasDisplay, HasDebug, HasNeither>
// where
// HasDisplay: Display,
// HasDebug: Debug;
//
// impl<HasDisplay, HasDebug, HasNeither> Error
// for EnumCompound<HasDisplay, HasDebug, HasNeither>
// where
// Self: Debug + Display;
//
#[derive(Error)]
pub enum EnumCompound<HasDisplay, HasDebug, HasNeither> {
#[error("{0} {1:?}")]
DisplayDebug(HasDisplay, HasDebug),
#[error("{0}")]
Display(HasDisplay, HasNeither),
#[error("{1:?}")]
Debug(HasNeither, HasDebug),
}
impl<HasDisplay, HasDebug, HasNeither> Debug for EnumCompound<HasDisplay, HasDebug, HasNeither> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("EnumCompound")
}
}
#[test]
fn test_display_enum_compound() {
let mut instance: EnumCompound<DisplayOnly, DebugOnly, NoFormat>;
instance = EnumCompound::DisplayDebug(DisplayOnly, DebugOnly);
assert_eq!(format!("{}", instance), "display only DebugOnly");
instance = EnumCompound::Display(DisplayOnly, NoFormat);
assert_eq!(format!("{}", instance), "display only");
instance = EnumCompound::Debug(NoFormat, DebugOnly);
assert_eq!(format!("{}", instance), "DebugOnly");
}
// Should expand to:
//
// impl<E> Display for EnumTransparentGeneric<E>
// where
// E: Display;
//
// impl<E> Error for EnumTransparentGeneric<E>
// where
// E: Error,
// Self: Debug + Display;
//
#[derive(Error, Debug)]
pub enum EnumTransparentGeneric<E> {
#[error(transparent)]
Other(E),
}
// Should expand to:
//
// impl<E> Display for StructDebugGeneric<E>
// where
// E: Debug;
//
// impl<E> Error for StructDebugGeneric<E>
// where
// Self: Debug + Display;
//
#[derive(Error, Debug)]
#[error("{underlying:?}")]
pub struct StructDebugGeneric<E> {
pub underlying: E,
}
// Should expand to:
//
// impl<E> Error for StructFromGeneric<E>
// where
// StructDebugGeneric<E>: Error + 'static,
// Self: Debug + Display;
//
#[derive(Error, Debug)]
pub struct StructFromGeneric<E> {
#[from]
pub source: StructDebugGeneric<E>,
}
// Should expand to:
//
// impl<E> Display for StructTransparentGeneric<E>
// where
// E: Display;
//
// impl<E> Error for StructTransparentGeneric<E>
// where
// E: Error,
// Self: Debug + Display;
//
#[derive(Error, Debug)]
#[error(transparent)]
pub struct StructTransparentGeneric<E>(pub E);
// Regression test for https://github.com/dtolnay/thiserror/issues/345
#[test]
fn test_no_bound_on_named_fmt() {
#[derive(Error, Debug)]
#[error("{thing}", thing = "...")]
struct Error<T> {
thing: T,
}
let error = Error { thing: DebugOnly };
assert_eq!(error.to_string(), "...");
}
#[test]
fn test_multiple_bound() {
#[derive(Error, Debug)]
#[error("0x{thing:x} 0x{thing:X}")]
pub struct Error<T> {
thing: T,
}
let error = Error { thing: 0xFFi32 };
assert_eq!(error.to_string(), "0xff 0xFF");
}
|