kutil_std/error/
message.rs

1/// Define a message error.
2#[macro_export]
3macro_rules! message_error {
4    ( $type:ident, $message:literal ) => {
5        /// $type.
6        #[derive(Clone, Debug, Default)]
7        pub struct $type(::std::option::Option<::std::string::String>);
8
9        impl $type {
10            /// Constructor.
11            pub fn new() -> Self {
12                Self(::std::option::Option::None)
13            }
14
15            /// Constructor.
16            pub fn new_from<DisplayT>(display: DisplayT) -> Self
17            where
18                DisplayT: ::std::fmt::Display,
19            {
20                display.to_string().into()
21            }
22        }
23
24        impl ::std::convert::From<::std::string::String> for $type {
25            fn from(message: ::std::string::String) -> Self {
26                Self(::std::option::Option::Some(message))
27            }
28        }
29
30        impl ::std::convert::From<&str> for $type {
31            fn from(message: &str) -> Self {
32                Self(::std::option::Option::Some(message.into()))
33            }
34        }
35
36        impl ::std::fmt::Display for $type {
37            fn fmt(&self, formatter: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
38                match &self.0 {
39                    ::std::option::Option::Some(message) => ::std::write!(formatter, "{}: {}", $message, message),
40                    ::std::option::Option::None => ::std::fmt::Display::fmt($message, formatter),
41                }
42            }
43        }
44
45        impl ::std::error::Error for $type {}
46    };
47}
kutil_std/error/message.rs

kutil_std/error/
message.rs
