macro_rules! pass {
() => { ... };
($mess:literal) => { ... };
($mess:ident) => { ... };
}
Expand description
Prints count information to stderr.
The macro takes an optional message argument, either
as a literal or a variable that has the Display
trait.
Examples
Run without arguments to get basic debug information:
pass!(); // Stderr: [<count>][<line_number>]
You can pass a literal to have it printed:
// Stderr: [<count>][<line_number>] Special message
pass!("Special message");
// Stderr: [<count>][<line_number>] a
pass!('a');
// Stderr: [<count>][<line_number>] 5999999
pass(5999999);
You can pass a variable with the Display
trait too:
let hw = String::from("Hello world");
let num = 5;
// Stderr: [<count>][<line_number] Hello world
pass!(hw);
// Stderr: [<count>][<line_number] 5
pass!(num);