| // The `format_args!` syntax extension issues errors before code expansion |
| // has completed, but we still need a backtrace. |
| |
| // This test includes stripped-down versions of `print!` and `println!`, |
| // because we can't otherwise verify the lines of the backtrace. |
| |
| fn print(_args: std::fmt::Arguments) {} |
| |
| macro_rules! myprint { |
| ($($arg:tt)*) => (print(format_args!($($arg)*))); |
| } |
| |
| macro_rules! myprintln { |
| ($fmt:expr) => (myprint!(concat!($fmt, "\n"))); //~ ERROR no arguments were given |
| } |
| |
| fn main() { |
| myprintln!("{}"); |
| } |
