diff options
Diffstat (limited to 'src/tools/clippy/tests/ui/verbose_file_reads.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/verbose_file_reads.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/verbose_file_reads.rs b/src/tools/clippy/tests/ui/verbose_file_reads.rs new file mode 100644 index 000000000..e0065e05a --- /dev/null +++ b/src/tools/clippy/tests/ui/verbose_file_reads.rs @@ -0,0 +1,28 @@ +#![warn(clippy::verbose_file_reads)] +use std::env::temp_dir; +use std::fs::File; +use std::io::Read; + +struct Struct; +// To make sure we only warn on File::{read_to_end, read_to_string} calls +impl Struct { + pub fn read_to_end(&self) {} + + pub fn read_to_string(&self) {} +} + +fn main() -> std::io::Result<()> { + let path = "foo.txt"; + // Lint shouldn't catch this + let s = Struct; + s.read_to_end(); + s.read_to_string(); + // Should catch this + let mut f = File::open(&path)?; + let mut buffer = Vec::new(); + f.read_to_end(&mut buffer)?; + // ...and this + let mut string_buffer = String::new(); + f.read_to_string(&mut string_buffer)?; + Ok(()) +} |