Fixup natvis for NonNull and Unique types

Remove the Shared type natvis since it no longer exists

Author: wesleywiser

src/etc/natvis/libcore.natvis

@@ -75,24 +75,17 @@
     <DisplayString>{__0}</DisplayString>
   </Type>
 
-  <Type Name="core::ptr::Unique&lt;*&gt;">
-    <DisplayString>{{ Unique {pointer} }}</DisplayString>
-    <Expand>
-      <Item Name="[ptr]">pointer</Item>
-    </Expand>
-  </Type>
-
-  <Type Name="core::ptr::Shared&lt;*&gt;">
-    <DisplayString>{{ Shared {pointer} }}</DisplayString>
+  <Type Name="core::ptr::non_null::NonNull&lt;*&gt;">
+    <DisplayString>NonNull({(void*) pointer}: {pointer})</DisplayString>
     <Expand>
-      <Item Name="[ptr]">pointer</Item>
+      <ExpandedItem>pointer</ExpandedItem>
     </Expand>
   </Type>
 
-  <Type Name="core::ptr::non_null::NonNull&lt;*&gt;">
-    <DisplayString>{(void*) pointer}</DisplayString>
+  <Type Name="core::ptr::unique::Unique&lt;*&gt;">
+    <DisplayString>Unique({(void*)pointer}: {pointer})</DisplayString>
     <Expand>
-      <Item Name="[value]">*pointer</Item>
+      <ExpandedItem>pointer</ExpandedItem>
     </Expand>
   </Type>
 

src/test/debuginfo/marker-types.rs

@@ -0,0 +1,21 @@
+// only-cdb
+// compile-flags:-g
+
+// === CDB TESTS ==================================================================================
+
+// cdb-command: g
+
+// cdb-command: dx nonnull
+// cdb-check:nonnull          : NonNull(0x[...]: 0xc) [Type: core::ptr::non_null::NonNull<u32>]
+// cdb-check:    [<Raw View>]     [Type: core::ptr::non_null::NonNull<u32>]
+// cdb-checK:    0xc [Type: unsigned int]
+
+use std::ptr::NonNull;
+
+fn main() {
+    let nonnull: NonNull<_> = (&12u32).into();
+
+    zzz(); // #break
+}
+
+fn zzz() { }