New upstream version 1.52.1+dfsg1

[rustc.git] / src / tools / clippy / tests / ui / match_overlapping_arm.rs

diff --git a/src/tools/clippy/tests/ui/match_overlapping_arm.rs b/src/tools/clippy/tests/ui/match_overlapping_arm.rs
new file mode 100644 (file)
index 0000000..44c51e8
--- /dev/null
+++ b/src/tools/clippy/tests/ui/match_overlapping_arm.rs
@@ -0,0 +1,112 @@
+#![feature(exclusive_range_pattern)]
+#![feature(half_open_range_patterns)]
+#![warn(clippy::match_overlapping_arm)]
+#![allow(clippy::redundant_pattern_matching)]
+
+/// Tests for match_overlapping_arm
+
+fn overlapping() {
+    const FOO: u64 = 2;
+
+    match 42 {
+        0..=10 => println!("0 ... 10"),
+        0..=11 => println!("0 ... 11"),
+        _ => (),
+    }
+
+    match 42 {
+        0..=5 => println!("0 ... 5"),
+        6..=7 => println!("6 ... 7"),
+        FOO..=11 => println!("0 ... 11"),
+        _ => (),
+    }
+
+    match 42 {
+        2 => println!("2"),
+        0..=5 => println!("0 ... 5"),
+        _ => (),
+    }
+
+    match 42 {
+        2 => println!("2"),
+        0..=2 => println!("0 ... 2"),
+        _ => (),
+    }
+
+    match 42 {
+        0..=10 => println!("0 ... 10"),
+        11..=50 => println!("11 ... 50"),
+        _ => (),
+    }
+
+    match 42 {
+        2 => println!("2"),
+        0..2 => println!("0 .. 2"),
+        _ => (),
+    }
+
+    match 42 {
+        0..10 => println!("0 .. 10"),
+        10..50 => println!("10 .. 50"),
+        _ => (),
+    }
+
+    match 42 {
+        0..11 => println!("0 .. 11"),
+        0..=11 => println!("0 ... 11"),
+        _ => (),
+    }
+
+    match 42 {
+        5..7 => println!("5 .. 7"),
+        0..10 => println!("0 .. 10"),
+        _ => (),
+    }
+
+    match 42 {
+        5..10 => println!("5 .. 10"),
+        0..=10 => println!("0 ... 10"),
+        _ => (),
+    }
+
+    match 42 {
+        0..14 => println!("0 .. 14"),
+        5..10 => println!("5 .. 10"),
+        _ => (),
+    }
+
+    match 42 {
+        5..14 => println!("5 .. 14"),
+        0..=10 => println!("0 ... 10"),
+        _ => (),
+    }
+
+    match 42 {
+        0..7 => println!("0 .. 7"),
+        0..=10 => println!("0 ... 10"),
+        _ => (),
+    }
+
+    /*
+    // FIXME(JohnTitor): uncomment this once rustfmt knows half-open patterns
+    match 42 {
+        0.. => println!("0 .. 42"),
+        3.. => println!("3 .. 42"),
+        _ => (),
+    }
+
+    match 42 {
+        ..=23 => println!("0 ... 23"),
+        ..26 => println!("0 .. 26"),
+        _ => (),
+    }
+    */
+
+    if let None = Some(42) {
+        // nothing
+    } else if let None = Some(42) {
+        // another nothing :-)
+    }
+}
+
+fn main() {}