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