macro_rules! warning {
($($tt:tt)*) => { ... };
}
Expand description
Display a warning in the same style as cargo or rustc:
warning[E1234]: a warning message
–> examples/macros.rs:2:3
Example
warning!(at: "examples/macros.rs", line: 2, col: 3, code: "E1234", "a {} message", "warning");
warning!("a {} message", "warning"); // all params optional