20 lines
349 B
Rust
20 lines
349 B
Rust
#![allow(unused_must_use)]
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#![warn(writeln_empty_string)]
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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!(&mut v, "");
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let mut suggestion = Vec::new();
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writeln!(&mut suggestion, "");
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// These should be fine
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writeln!(&mut v);
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writeln!(&mut v, " ");
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write!(&mut v, "");
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}
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