From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/tools/clippy/tests/ui/match_on_vec_items.rs | 152 ++++++++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100644 src/tools/clippy/tests/ui/match_on_vec_items.rs

(limited to 'src/tools/clippy/tests/ui/match_on_vec_items.rs')

diff --git a/src/tools/clippy/tests/ui/match_on_vec_items.rs b/src/tools/clippy/tests/ui/match_on_vec_items.rs
new file mode 100644
index 000000000..30415e3b9
--- /dev/null
+++ b/src/tools/clippy/tests/ui/match_on_vec_items.rs
@@ -0,0 +1,152 @@
+#![warn(clippy::match_on_vec_items)]
+
+fn match_with_wildcard() {
+    let arr = vec![0, 1, 2, 3];
+    let range = 1..3;
+    let idx = 1;
+
+    // Lint, may panic
+    match arr[idx] {
+        0 => println!("0"),
+        1 => println!("1"),
+        _ => {},
+    }
+
+    // Lint, may panic
+    match arr[range] {
+        [0, 1] => println!("0 1"),
+        [1, 2] => println!("1 2"),
+        _ => {},
+    }
+}
+
+fn match_without_wildcard() {
+    let arr = vec![0, 1, 2, 3];
+    let range = 1..3;
+    let idx = 2;
+
+    // Lint, may panic
+    match arr[idx] {
+        0 => println!("0"),
+        1 => println!("1"),
+        num => {},
+    }
+
+    // Lint, may panic
+    match arr[range] {
+        [0, 1] => println!("0 1"),
+        [1, 2] => println!("1 2"),
+        [ref sub @ ..] => {},
+    }
+}
+
+fn match_wildcard_and_action() {
+    let arr = vec![0, 1, 2, 3];
+    let range = 1..3;
+    let idx = 3;
+
+    // Lint, may panic
+    match arr[idx] {
+        0 => println!("0"),
+        1 => println!("1"),
+        _ => println!("Hello, World!"),
+    }
+
+    // Lint, may panic
+    match arr[range] {
+        [0, 1] => println!("0 1"),
+        [1, 2] => println!("1 2"),
+        _ => println!("Hello, World!"),
+    }
+}
+
+fn match_vec_ref() {
+    let arr = &vec![0, 1, 2, 3];
+    let range = 1..3;
+    let idx = 3;
+
+    // Lint, may panic
+    match arr[idx] {
+        0 => println!("0"),
+        1 => println!("1"),
+        _ => {},
+    }
+
+    // Lint, may panic
+    match arr[range] {
+        [0, 1] => println!("0 1"),
+        [1, 2] => println!("1 2"),
+        _ => {},
+    }
+}
+
+fn match_with_get() {
+    let arr = vec![0, 1, 2, 3];
+    let range = 1..3;
+    let idx = 3;
+
+    // Ok
+    match arr.get(idx) {
+        Some(0) => println!("0"),
+        Some(1) => println!("1"),
+        _ => {},
+    }
+
+    // Ok
+    match arr.get(range) {
+        Some(&[0, 1]) => println!("0 1"),
+        Some(&[1, 2]) => println!("1 2"),
+        _ => {},
+    }
+}
+
+fn match_with_array() {
+    let arr = [0, 1, 2, 3];
+    let range = 1..3;
+    let idx = 3;
+
+    // Ok
+    match arr[idx] {
+        0 => println!("0"),
+        1 => println!("1"),
+        _ => {},
+    }
+
+    // Ok
+    match arr[range] {
+        [0, 1] => println!("0 1"),
+        [1, 2] => println!("1 2"),
+        _ => {},
+    }
+}
+
+fn match_with_endless_range() {
+    let arr = vec![0, 1, 2, 3];
+    let range = ..;
+
+    // Ok
+    match arr[range] {
+        [0, 1] => println!("0 1"),
+        [1, 2] => println!("1 2"),
+        [0, 1, 2, 3] => println!("0, 1, 2, 3"),
+        _ => {},
+    }
+
+    // Ok
+    match arr[..] {
+        [0, 1] => println!("0 1"),
+        [1, 2] => println!("1 2"),
+        [0, 1, 2, 3] => println!("0, 1, 2, 3"),
+        _ => {},
+    }
+}
+
+fn main() {
+    match_with_wildcard();
+    match_without_wildcard();
+    match_wildcard_and_action();
+    match_vec_ref();
+    match_with_get();
+    match_with_array();
+    match_with_endless_range();
+}
-- 
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