Expand test to cover type_name and monomorphic use

Author: nbdd0121

src/test/ui/consts/issue-73976-monomorphic.rs

@@ -0,0 +1,36 @@
+// check-pass
+//
+// This test is complement to the test in issue-73976-polymorphic.rs.
+// In that test we ensure that polymorphic use of type_id and type_name in patterns
+// will be properly rejected. This test will ensure that monomorphic use of these
+// would not be wrongly rejected in patterns.
+
+#![feature(const_type_id)]
+#![feature(const_type_name)]
+
+use std::any::{self, TypeId};
+
+pub struct GetTypeId<T>(T);
+
+impl<T: 'static> GetTypeId<T> {
+    pub const VALUE: TypeId = TypeId::of::<T>();
+}
+
+const fn check_type_id<T: 'static>() -> bool {
+    matches!(GetTypeId::<T>::VALUE, GetTypeId::<usize>::VALUE)
+}
+
+pub struct GetTypeNameLen<T>(T);
+
+impl<T: 'static> GetTypeNameLen<T> {
+    pub const VALUE: usize = any::type_name::<T>().len();
+}
+
+const fn check_type_name_len<T: 'static>() -> bool {
+    matches!(GetTypeNameLen::<T>::VALUE, GetTypeNameLen::<usize>::VALUE)
+}
+
+fn main() {
+    assert!(check_type_id::<usize>());
+    assert!(check_type_name_len::<usize>());
+}

src/test/ui/consts/issue-73976.rs src/test/ui/consts/issue-73976-polymorphic.rs

@@ -6,8 +6,9 @@
 // Currently we just disallow this usage and require pattern is monomorphic.
 
 #![feature(const_type_id)]
+#![feature(const_type_name)]
 
-use std::any::TypeId;
+use std::any::{self, TypeId};
 
 pub struct GetTypeId<T>(T);
 
@@ -21,6 +22,19 @@ const fn check_type_id<T: 'static>() -> bool {
     //~| ERROR could not evaluate constant pattern
 }
 
+pub struct GetTypeNameLen<T>(T);
+
+impl<T: 'static> GetTypeNameLen<T> {
+    pub const VALUE: usize = any::type_name::<T>().len();
+}
+
+const fn check_type_name_len<T: 'static>() -> bool {
+    matches!(GetTypeNameLen::<T>::VALUE, GetTypeNameLen::<T>::VALUE)
+    //~^ ERROR could not evaluate constant pattern
+    //~| ERROR could not evaluate constant pattern
+}
+
 fn main() {
     assert!(check_type_id::<usize>());
+    assert!(check_type_name_len::<usize>());
 }

src/test/ui/consts/issue-73976-polymorphic.stderr

@@ -0,0 +1,26 @@
+error: could not evaluate constant pattern
+  --> $DIR/issue-73976-polymorphic.rs:20:37
+   |
+LL |     matches!(GetTypeId::<T>::VALUE, GetTypeId::<T>::VALUE)
+   |                                     ^^^^^^^^^^^^^^^^^^^^^
+
+error: could not evaluate constant pattern
+  --> $DIR/issue-73976-polymorphic.rs:32:42
+   |
+LL |     matches!(GetTypeNameLen::<T>::VALUE, GetTypeNameLen::<T>::VALUE)
+   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: could not evaluate constant pattern
+  --> $DIR/issue-73976-polymorphic.rs:20:37
+   |
+LL |     matches!(GetTypeId::<T>::VALUE, GetTypeId::<T>::VALUE)
+   |                                     ^^^^^^^^^^^^^^^^^^^^^
+
+error: could not evaluate constant pattern
+  --> $DIR/issue-73976-polymorphic.rs:32:42
+   |
+LL |     matches!(GetTypeNameLen::<T>::VALUE, GetTypeNameLen::<T>::VALUE)
+   |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+error: aborting due to 4 previous errors
+