77 lines
2.2 KiB
Rust
77 lines
2.2 KiB
Rust
// FIXME: Ideally these suggestions would be fixed via rustfix. Blocked by rust-lang/rust#53934
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#![allow(clippy::write_literal)]
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#![warn(clippy::write_with_newline)]
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use std::io::Write;
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fn main() {
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let mut v = Vec::new();
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// These should fail
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writeln!(v, "Hello");
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//~^ ERROR: using `write!()` with a format string that ends in a single newline
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//~| NOTE: `-D clippy::write-with-newline` implied by `-D warnings`
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writeln!(v, "Hello {}", "world");
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//~^ ERROR: using `write!()` with a format string that ends in a single newline
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writeln!(v, "Hello {} {}", "world", "#2");
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//~^ ERROR: using `write!()` with a format string that ends in a single newline
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writeln!(v, "{}", 1265);
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//~^ ERROR: using `write!()` with a format string that ends in a single newline
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writeln!(v);
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//~^ ERROR: using `write!()` with a format string that ends in a single newline
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// These should be fine
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write!(v, "");
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write!(v, "Hello");
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writeln!(v, "Hello");
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writeln!(v, "Hello\n");
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writeln!(v, "Hello {}\n", "world");
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write!(v, "Issue\n{}", 1265);
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write!(v, "{}", 1265);
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write!(v, "\n{}", 1275);
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write!(v, "\n\n");
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write!(v, "like eof\n\n");
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write!(v, "Hello {} {}\n\n", "world", "#2");
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// #3126
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writeln!(v, "\ndon't\nwarn\nfor\nmultiple\nnewlines\n");
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// #3126
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writeln!(v, "\nbla\n\n");
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// Escaping
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// #3514
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write!(v, "\\n");
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writeln!(v, "\\");
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//~^ ERROR: using `write!()` with a format string that ends in a single newline
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write!(v, "\\\\n");
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// Raw strings
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// #3778
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write!(v, r"\n");
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// Literal newlines should also fail
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writeln!(
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//~^ ERROR: using `write!()` with a format string that ends in a single newline
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v
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);
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writeln!(
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//~^ ERROR: using `write!()` with a format string that ends in a single newline
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v
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);
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// Don't warn on CRLF (#4208)
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write!(v, "\r\n");
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write!(v, "foo\r\n");
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writeln!(v, "\\r");
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//~^ ERROR: using `write!()` with a format string that ends in a single newline
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write!(v, "foo\rbar\n");
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// Ignore expanded format strings
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macro_rules! newline {
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() => {
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"\n"
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};
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}
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write!(v, newline!());
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}
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