rust/tests/ui/format.rs
2017-10-03 12:07:24 +02:00

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#![warn(useless_format)]
fn main() {
format!("foo");
format!("{}", "foo");
format!("{:?}", "foo"); // we only want to warn about `{}`
format!("{:+}", "foo"); // we only want to warn about `{}`
format!("foo {}", "bar");
format!("{} bar", "foo");
let arg: String = "".to_owned();
format!("{}", arg);
format!("{:?}", arg); // we only want to warn about `{}`
format!("{:+}", arg); // we only want to warn about `{}`
format!("foo {}", arg);
format!("{} bar", arg);
// we dont want to warn for non-string args, see #697
format!("{}", 42);
format!("{:?}", 42);
format!("{:+}", 42);
format!("foo {}", 42);
format!("{} bar", 42);
// we only want to warn about `format!` itself
println!("foo");
println!("{}", "foo");
println!("foo {}", "foo");
println!("{}", 42);
println!("foo {}", 42);
}