Macro http_types::format_err [−][src]
macro_rules! format_err { ($msg : literal $(,) ?) => { ... }; ($err : expr $(,) ?) => { ... }; ($fmt : expr, $($arg : tt) *) => { ... }; }
Expand description
Construct an ad-hoc error from a string.
This evaluates to an Error
. It can take either just a string, or a format
string with arguments. It also can take any custom type which implements
Debug
and Display
.