1 files changed, 84 insertions, 0 deletions
diff --git a/src/test/ui/rfc-2294-if-let-guard/feature-gate.rs b/src/test/ui/rfc-2294-if-let-guard/feature-gate.rs
new file mode 100644
index 000000000..f0105e08e
--- /dev/null
+++ b/src/test/ui/rfc-2294-if-let-guard/feature-gate.rs
@@ -0,0 +1,84 @@
+// gate-test-if_let_guard
+
+use std::ops::Range;
+
+fn _if_let_guard() {
+    match () {
+        () if let 0 = 1 => {}
+        //~^ ERROR `if let` guards are experimental
+
+        () if (let 0 = 1) => {}
+        //~^ ERROR `let` expressions in this position are unstable
+        //~| ERROR expected expression, found `let` statement
+
+        () if (((let 0 = 1))) => {}
+        //~^ ERROR `let` expressions in this position are unstable
+        //~| ERROR expected expression, found `let` statement
+
+        () if true && let 0 = 1 => {}
+        //~^ ERROR `if let` guards are experimental
+        //~| ERROR `let` expressions in this position are unstable
+
+        () if let 0 = 1 && true => {}
+        //~^ ERROR `if let` guards are experimental
+        //~| ERROR `let` expressions in this position are unstable
+
+        () if (let 0 = 1) && true => {}
+        //~^ ERROR `let` expressions in this position are unstable
+        //~| ERROR expected expression, found `let` statement
+
+        () if true && (let 0 = 1) => {}
+        //~^ ERROR `let` expressions in this position are unstable
+        //~| ERROR expected expression, found `let` statement
+
+        () if (let 0 = 1) && (let 0 = 1) => {}
+        //~^ ERROR `let` expressions in this position are unstable
+        //~| ERROR `let` expressions in this position are unstable
+        //~| ERROR expected expression, found `let` statement
+        //~| ERROR expected expression, found `let` statement
+
+        () if let 0 = 1 && let 1 = 2 && (let 2 = 3 && let 3 = 4 && let 4 = 5) => {}
+        //~^ ERROR `if let` guards are experimental
+        //~| ERROR `let` expressions in this position are unstable
+        //~| ERROR `let` expressions in this position are unstable
+        //~| ERROR `let` expressions in this position are unstable
+        //~| ERROR `let` expressions in this position are unstable
+        //~| ERROR `let` expressions in this position are unstable
+        //~| ERROR expected expression, found `let` statement
+        //~| ERROR expected expression, found `let` statement
+        //~| ERROR expected expression, found `let` statement
+
+        () if let Range { start: _, end: _ } = (true..true) && false => {}
+        //~^ ERROR `if let` guards are experimental
+        //~| ERROR `let` expressions in this position are unstable
+
+        _ => {}
+    }
+}
+
+fn _macros() {
+    macro_rules! use_expr {
+        ($e:expr) => {
+            match () {
+                () if $e => {}
+                _ => {}
+            }
+        }
+    }
+    use_expr!((let 0 = 1 && 0 == 0));
+    //~^ ERROR `let` expressions in this position are unstable
+    //~| ERROR expected expression, found `let` statement
+    use_expr!((let 0 = 1));
+    //~^ ERROR `let` expressions in this position are unstable
+    //~| ERROR expected expression, found `let` statement
+    match () {
+        #[cfg(FALSE)]
+        () if let 0 = 1 => {}
+        //~^ ERROR `if let` guards are experimental
+        _ => {}
+    }
+    use_expr!(let 0 = 1);
+    //~^ ERROR no rules expected the token `let`
+}
+
+fn main() {}