Merge commit 'e636b88aa180e8cab9e28802aac90adbc984234d' into clippyup

[rust.git] / tests / ui / redundant_pattern_matching.rs

diff --git a/tests/ui/redundant_pattern_matching.rs b/tests/ui/redundant_pattern_matching.rs
index 8e8d4b59ba4e6ba2d619713a8e93ef4c0d959cd8..09426a6e59082275ac3c35124585476add74f551 100644 (file)
--- a/tests/ui/redundant_pattern_matching.rs
+++ b/tests/ui/redundant_pattern_matching.rs
@@ -1,23 +1,31 @@
+// run-rustfix
+
 #![warn(clippy::all)]
 #![warn(clippy::redundant_pattern_matching)]
+#![allow(
+    clippy::unit_arg,
+    unused_must_use,
+    clippy::needless_bool,
+    clippy::match_like_matches_macro,
+    deprecated
+)]
 
 fn main() {
+    let result: Result<usize, usize> = Err(5);
+    if let Ok(_) = &result {}
+
     if let Ok(_) = Ok::<i32, i32>(42) {}
 
     if let Err(_) = Err::<i32, i32>(42) {}
 
-    if let None = None::<()> {}
+    while let Ok(_) = Ok::<i32, i32>(10) {}
 
-    if let Some(_) = Some(42) {}
+    while let Err(_) = Ok::<i32, i32>(10) {}
 
     if Ok::<i32, i32>(42).is_ok() {}
 
     if Err::<i32, i32>(42).is_err() {}
 
-    if None::<i32>.is_none() {}
-
-    if Some(42).is_some() {}
-
     if let Ok(x) = Ok::<i32, i32>(42) {
         println!("{}", x);
     }
@@ -42,13 +50,78 @@ fn main() {
         Err(_) => false,
     };
 
-    match Some(42) {
-        Some(_) => true,
-        None => false,
+    let _ = if let Ok(_) = Ok::<usize, ()>(4) { true } else { false };
+
+    issue5504();
+    issue6067();
+    issue6065();
+
+    let _ = if let Ok(_) = gen_res() {
+        1
+    } else if let Err(_) = gen_res() {
+        2
+    } else {
+        3
     };
+}
+
+fn gen_res() -> Result<(), ()> {
+    Ok(())
+}
+
+macro_rules! m {
+    () => {
+        Some(42u32)
+    };
+}
+
+fn issue5504() {
+    fn result_opt() -> Result<Option<i32>, i32> {
+        Err(42)
+    }
+
+    fn try_result_opt() -> Result<i32, i32> {
+        while let Some(_) = r#try!(result_opt()) {}
+        if let Some(_) = r#try!(result_opt()) {}
+        Ok(42)
+    }
+
+    try_result_opt();
+
+    if let Some(_) = m!() {}
+    while let Some(_) = m!() {}
+}
 
-    match None::<()> {
-        Some(_) => false,
-        None => true,
+fn issue6065() {
+    macro_rules! if_let_in_macro {
+        ($pat:pat, $x:expr) => {
+            if let Some($pat) = $x {}
+        };
+    }
+
+    // shouldn't be linted
+    if_let_in_macro!(_, Some(42));
+}
+
+// Methods that are unstable const should not be suggested within a const context, see issue #5697.
+// However, in Rust 1.48.0 the methods `is_ok` and `is_err` of `Result` were stabilized as const,
+// so the following should be linted.
+const fn issue6067() {
+    if let Ok(_) = Ok::<i32, i32>(42) {}
+
+    if let Err(_) = Err::<i32, i32>(42) {}
+
+    while let Ok(_) = Ok::<i32, i32>(10) {}
+
+    while let Err(_) = Ok::<i32, i32>(10) {}
+
+    match Ok::<i32, i32>(42) {
+        Ok(_) => true,
+        Err(_) => false,
+    };
+
+    match Err::<i32, i32>(42) {
+        Ok(_) => false,
+        Err(_) => true,
     };
 }