rust/tests/ui/write_with_newline.rs

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// FIXME: Ideally these suggestions would be fixed via rustfix. Blocked by rust-lang/rust#53934
// // run-rustfix
2018-07-28 17:34:52 +02:00
#![allow(clippy::write_literal)]
#![warn(clippy::write_with_newline)]
use std::io::Write;
fn main() {
let mut v = Vec::new();
// These should fail
write!(&mut v, "Hello\n");
write!(&mut v, "Hello {}\n", "world");
write!(&mut v, "Hello {} {}\n", "world", "#2");
write!(&mut v, "{}\n", 1265);
// These should be fine
write!(&mut v, "");
write!(&mut v, "Hello");
writeln!(&mut v, "Hello");
writeln!(&mut v, "Hello\n");
writeln!(&mut v, "Hello {}\n", "world");
write!(&mut v, "Issue\n{}", 1265);
write!(&mut v, "{}", 1265);
write!(&mut v, "\n{}", 1275);
write!(&mut v, "\n\n");
write!(&mut v, "like eof\n\n");
write!(&mut v, "Hello {} {}\n\n", "world", "#2");
writeln!(&mut v, "\ndon't\nwarn\nfor\nmultiple\nnewlines\n"); // #3126
writeln!(&mut v, "\nbla\n\n"); // #3126
// Escaping
write!(&mut v, "\\n"); // #3514
write!(&mut v, "\\\n"); // should fail
write!(&mut v, "\\\\n");
// Raw strings
write!(&mut v, r"\n"); // #3778
// Literal newlines should also fail
write!(
&mut v,
"
"
);
write!(
&mut v,
r"
"
);
// Don't warn on CRLF (#4208)
write!(&mut v, "\r\n");
write!(&mut v, "foo\r\n");
write!(&mut v, "\\r\n"); //~ ERROR
write!(&mut v, "foo\rbar\n");
}