Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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(())
+}