rust/src/test/ui/macros/bad_hello.rs

fn main() {
    println!(3 + 4);
    //~^ ERROR format argument must be a string literal
    println!(3, 4);
    //~^ ERROR format argument must be a string literal
}
Update expression span when transcribing macro args closes #29084 closes #28308 closes #25385 closes #28288 closes #31011 closes #26480 closes #26093 closes #26094 closes #25386 closes #26237 closes #25793 2016-01-21 15:14:09 -06:00			`fn main() {`
Improve suggestion for missing fmt str in println Avoid using `concat!(fmt, "\n")` to improve the diagnostics being emitted when the first `println!()` argument isn't a formatting string literal. 2018-07-14 22:50:30 -05:00			`println!(3 + 4);`
			`//~^ ERROR format argument must be a string literal`
			`println!(3, 4);`
			`//~^ ERROR format argument must be a string literal`
Update expression span when transcribing macro args closes #29084 closes #28308 closes #25385 closes #28288 closes #31011 closes #26480 closes #26093 closes #26094 closes #25386 closes #26237 closes #25793 2016-01-21 15:14:09 -06:00			`}`