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-rw-r--r--tests/ui/cast/cast-as-bool.rs40
-rw-r--r--tests/ui/cast/cast-as-bool.stderr56
-rw-r--r--tests/ui/cast/cast-rfc0401-2.rs2
-rw-r--r--tests/ui/cast/cast-rfc0401-2.stderr2
-rw-r--r--tests/ui/error-codes/E0054.stderr2
-rw-r--r--tests/ui/error-festival.stderr2
-rw-r--r--tests/ui/mismatched_types/cast-rfc0401.stderr4
7 files changed, 96 insertions, 12 deletions
diff --git a/tests/ui/cast/cast-as-bool.rs b/tests/ui/cast/cast-as-bool.rs
index fbebc80d91c..750a88f97eb 100644
--- a/tests/ui/cast/cast-as-bool.rs
+++ b/tests/ui/cast/cast-as-bool.rs
@@ -1,12 +1,48 @@
 fn main() {
-    let u = 5 as bool; //~ ERROR cannot cast as `bool`
+    let u = 5 as bool; //~ ERROR cannot cast `i32` as `bool`
                        //~| HELP compare with zero instead
                        //~| SUGGESTION 5 != 0
 
-    let t = (1 + 2) as bool; //~ ERROR cannot cast as `bool`
+    let t = (1 + 2) as bool; //~ ERROR cannot cast `i32` as `bool`
                              //~| HELP compare with zero instead
                              //~| SUGGESTION (1 + 2) != 0
 
+    let _ = 5_u32 as bool; //~ ERROR cannot cast `u32` as `bool`
+                           //~| HELP compare with zero instead
+
+    let _ = 64.0_f64 as bool; //~ ERROR cannot cast `f64` as `bool`
+                              //~| HELP compare with zero instead
+
+    // Enums that can normally be cast to integers can't be cast to `bool`, just like integers.
+    // Note that enums that cannot be cast to integers can't be cast to anything at *all*
+    // so that's not tested here.
+    enum IntEnum {
+        Zero,
+        One,
+        Two
+    }
+    let _ = IntEnum::One as bool; //~ ERROR cannot cast `IntEnum` as `bool`
+
+    fn uwu(_: u8) -> String {
+        todo!()
+    }
+
+    unsafe fn owo() {}
+
+    // fn item to bool
+    let _ = uwu as bool; //~ ERROR cannot cast `fn(u8) -> String {uwu}` as `bool`
+    // unsafe fn item
+    let _ = owo as bool; //~ ERROR cannot cast `unsafe fn() {owo}` as `bool`
+
+    // fn ptr to bool
+    let _ = uwu as fn(u8) -> String as bool; //~ ERROR cannot cast `fn(u8) -> String` as `bool`
+
+    let _ = 'x' as bool; //~ ERROR cannot cast `char` as `bool`
+
+    let ptr = 1 as *const ();
+
+    let _ = ptr as bool; //~ ERROR cannot cast `*const ()` as `bool`
+
     let v = "hello" as bool;
     //~^ ERROR casting `&'static str` as `bool` is invalid
     //~| HELP consider using the `is_empty` method on `&'static str` to determine if it contains anything
diff --git a/tests/ui/cast/cast-as-bool.stderr b/tests/ui/cast/cast-as-bool.stderr
index 19ac8f10fec..852fb30cc20 100644
--- a/tests/ui/cast/cast-as-bool.stderr
+++ b/tests/ui/cast/cast-as-bool.stderr
@@ -1,18 +1,66 @@
-error[E0054]: cannot cast as `bool`
+error[E0054]: cannot cast `i32` as `bool`
   --> $DIR/cast-as-bool.rs:2:13
    |
 LL |     let u = 5 as bool;
    |             ^^^^^^^^^ help: compare with zero instead: `5 != 0`
 
-error[E0054]: cannot cast as `bool`
+error[E0054]: cannot cast `i32` as `bool`
   --> $DIR/cast-as-bool.rs:6:13
    |
 LL |     let t = (1 + 2) as bool;
    |             ^^^^^^^^^^^^^^^ help: compare with zero instead: `(1 + 2) != 0`
 
-error[E0606]: casting `&'static str` as `bool` is invalid
+error[E0054]: cannot cast `u32` as `bool`
   --> $DIR/cast-as-bool.rs:10:13
    |
+LL |     let _ = 5_u32 as bool;
+   |             ^^^^^^^^^^^^^ help: compare with zero instead: `5_u32 != 0`
+
+error[E0054]: cannot cast `f64` as `bool`
+  --> $DIR/cast-as-bool.rs:13:13
+   |
+LL |     let _ = 64.0_f64 as bool;
+   |             ^^^^^^^^^^^^^^^^ help: compare with zero instead: `64.0_f64 != 0`
+
+error[E0054]: cannot cast `IntEnum` as `bool`
+  --> $DIR/cast-as-bool.rs:24:13
+   |
+LL |     let _ = IntEnum::One as bool;
+   |             ^^^^^^^^^^^^^^^^^^^^ unsupported cast
+
+error[E0054]: cannot cast `fn(u8) -> String {uwu}` as `bool`
+  --> $DIR/cast-as-bool.rs:33:13
+   |
+LL |     let _ = uwu as bool;
+   |             ^^^^^^^^^^^ unsupported cast
+
+error[E0054]: cannot cast `unsafe fn() {owo}` as `bool`
+  --> $DIR/cast-as-bool.rs:35:13
+   |
+LL |     let _ = owo as bool;
+   |             ^^^^^^^^^^^ unsupported cast
+
+error[E0054]: cannot cast `fn(u8) -> String` as `bool`
+  --> $DIR/cast-as-bool.rs:38:13
+   |
+LL |     let _ = uwu as fn(u8) -> String as bool;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unsupported cast
+
+error[E0054]: cannot cast `char` as `bool`
+  --> $DIR/cast-as-bool.rs:40:13
+   |
+LL |     let _ = 'x' as bool;
+   |             ^^^^^^^^^^^ unsupported cast
+
+error[E0054]: cannot cast `*const ()` as `bool`
+  --> $DIR/cast-as-bool.rs:44:13
+   |
+LL |     let _ = ptr as bool;
+   |             ^^^^^^^^^^^ unsupported cast
+
+error[E0606]: casting `&'static str` as `bool` is invalid
+  --> $DIR/cast-as-bool.rs:46:13
+   |
 LL |     let v = "hello" as bool;
    |             ^^^^^^^^^^^^^^^
    |
@@ -21,7 +69,7 @@ help: consider using the `is_empty` method on `&'static str` to determine if it
 LL |     let v = !"hello".is_empty();
    |             +       ~~~~~~~~~~~
 
-error: aborting due to 3 previous errors
+error: aborting due to 11 previous errors
 
 Some errors have detailed explanations: E0054, E0606.
 For more information about an error, try `rustc --explain E0054`.
diff --git a/tests/ui/cast/cast-rfc0401-2.rs b/tests/ui/cast/cast-rfc0401-2.rs
index 7709aa34104..70604a587ea 100644
--- a/tests/ui/cast/cast-rfc0401-2.rs
+++ b/tests/ui/cast/cast-rfc0401-2.rs
@@ -4,5 +4,5 @@
 
 fn main() {
     let _ = 3 as bool;
-    //~^ ERROR cannot cast as `bool`
+    //~^ ERROR cannot cast `i32` as `bool`
 }
diff --git a/tests/ui/cast/cast-rfc0401-2.stderr b/tests/ui/cast/cast-rfc0401-2.stderr
index 52f6af78a9b..5dc21ca847c 100644
--- a/tests/ui/cast/cast-rfc0401-2.stderr
+++ b/tests/ui/cast/cast-rfc0401-2.stderr
@@ -1,4 +1,4 @@
-error[E0054]: cannot cast as `bool`
+error[E0054]: cannot cast `i32` as `bool`
   --> $DIR/cast-rfc0401-2.rs:6:13
    |
 LL |     let _ = 3 as bool;
diff --git a/tests/ui/error-codes/E0054.stderr b/tests/ui/error-codes/E0054.stderr
index 6b1092760fb..ea81f4476a7 100644
--- a/tests/ui/error-codes/E0054.stderr
+++ b/tests/ui/error-codes/E0054.stderr
@@ -1,4 +1,4 @@
-error[E0054]: cannot cast as `bool`
+error[E0054]: cannot cast `i32` as `bool`
   --> $DIR/E0054.rs:3:24
    |
 LL |     let x_is_nonzero = x as bool;
diff --git a/tests/ui/error-festival.stderr b/tests/ui/error-festival.stderr
index e8ee1d96942..74a2bc8d768 100644
--- a/tests/ui/error-festival.stderr
+++ b/tests/ui/error-festival.stderr
@@ -59,7 +59,7 @@ error[E0605]: non-primitive cast: `u8` as `Vec<u8>`
 LL |     x as Vec<u8>;
    |     ^^^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
 
-error[E0054]: cannot cast as `bool`
+error[E0054]: cannot cast `{integer}` as `bool`
   --> $DIR/error-festival.rs:33:24
    |
 LL |     let x_is_nonzero = x as bool;
diff --git a/tests/ui/mismatched_types/cast-rfc0401.stderr b/tests/ui/mismatched_types/cast-rfc0401.stderr
index 6b9ac3c5852..0cea60746bf 100644
--- a/tests/ui/mismatched_types/cast-rfc0401.stderr
+++ b/tests/ui/mismatched_types/cast-rfc0401.stderr
@@ -82,13 +82,13 @@ error[E0606]: casting `f32` as `*const u8` is invalid
 LL |     let _ = f as *const u8;
    |             ^^^^^^^^^^^^^^
 
-error[E0054]: cannot cast as `bool`
+error[E0054]: cannot cast `i32` as `bool`
   --> $DIR/cast-rfc0401.rs:39:13
    |
 LL |     let _ = 3_i32 as bool;
    |             ^^^^^^^^^^^^^ help: compare with zero instead: `3_i32 != 0`
 
-error[E0054]: cannot cast as `bool`
+error[E0054]: cannot cast `E` as `bool`
   --> $DIR/cast-rfc0401.rs:40:13
    |
 LL |     let _ = E::A as bool;
generated by cgit-pink 1.4.1-3-g733a5 (git 2.37.1) at 2026-01-14 08:16:54 +0000