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Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/writeln_empty_string.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/writeln_empty_string.rs b/src/tools/clippy/tests/ui/writeln_empty_string.rs new file mode 100644 index 000000000..662c62f02 --- /dev/null +++ b/src/tools/clippy/tests/ui/writeln_empty_string.rs @@ -0,0 +1,20 @@ +// run-rustfix + +#![allow(unused_must_use)] +#![warn(clippy::writeln_empty_string)] +use std::io::Write; + +fn main() { + let mut v = Vec::new(); + + // These should fail + writeln!(v, ""); + + let mut suggestion = Vec::new(); + writeln!(suggestion, ""); + + // These should be fine + writeln!(v); + writeln!(v, " "); + write!(v, ""); +} |