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// FIXME: Ideally these suggestions would be fixed via rustfix. Blocked by rust-lang/rust#53934
// //@run-rustfix
#![allow(clippy::write_literal)]
#![warn(clippy::write_with_newline)]
use std::io::Write;
fn main() {
let mut v = Vec::new();
// These should fail
writeln!(v, "Hello");
writeln!(v, "Hello {}", "world");
writeln!(v, "Hello {} {}", "world", "#2");
writeln!(v, "{}", 1265);
writeln!(v);
// These should be fine
write!(v, "");
write!(v, "Hello");
writeln!(v, "Hello");
writeln!(v, "Hello\n");
writeln!(v, "Hello {}\n", "world");
write!(v, "Issue\n{}", 1265);
write!(v, "{}", 1265);
write!(v, "\n{}", 1275);
write!(v, "\n\n");
write!(v, "like eof\n\n");
write!(v, "Hello {} {}\n\n", "world", "#2");
writeln!(v, "\ndon't\nwarn\nfor\nmultiple\nnewlines\n"); // #3126
writeln!(v, "\nbla\n\n"); // #3126
// Escaping
write!(v, "\\n"); // #3514
writeln!(v, "\\"); // should fail
write!(v, "\\\\n");
// Raw strings
write!(v, r"\n"); // #3778
// Literal newlines should also fail
writeln!(
v
);
writeln!(
v
);
// Don't warn on CRLF (#4208)
write!(v, "\r\n");
write!(v, "foo\r\n");
writeln!(v, "\\r"); // warns
write!(v, "foo\rbar\n");
// Ignore expanded format strings
macro_rules! newline {
() => {
"\n"
};
}
write!(v, newline!());
}
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