[clang] [APINotes] Add Where.Object selectors for C++ methods (PR #216148)

[John Hui via cfe-commits]

================
@@ -0,0 +1,96 @@
+---
+Name: WhereObjectQualifiers
+Tags:
+- Name: ObjectBuilder
+  Methods:
+  - Name: buildRef
+    Where:
+      Object:
+        Ref: lvalue
+    SwiftName: buildFromLValue()
+  - Name: buildRef
+    Where:
+      Parameters: []
+      Object:
+        Ref: rvalue
+    SwiftName: buildFromRValue()
+  - Name: buildConst
+    Where:
+      Parameters: []
+      Object:
+        Const: false
+        Ref: lvalue
+    SwiftName: buildMutableLValue()
+  - Name: buildConst
+    Where:
+      Parameters: []
+      Object:
+        Const: true
+        Ref: lvalue
+    SwiftName: buildConstLValue()
+  - Name: buildVolatile
+    Where:
+      Parameters: []
+      Object:
+        Volatile: false
+    SwiftName: buildNonVolatile()
+  - Name: buildVolatile
+    Where:
+      Parameters: []
+      Object:
+        Volatile: true
+    SwiftName: buildVolatile()
+  - Name: buildNone
+    Where:
+      Parameters: []
+      Object:
+        Ref: none
+    SwiftName: buildUnqualified()
+  - Name: buildCombined
+    Where:
+      Parameters: []
+      Object:
+        Const: true
+        Volatile: true
+        Ref: lvalue
+    SwiftName: buildConstVolatileLValue()
+  - Name: buildConstRValue
+    Where:
+      Parameters: []
+      Object:
+        Const: true
+        Ref: rvalue
+    SwiftName: buildConstRValue()
+  - Name: buildVolatileRValue
+    Where:
+      Parameters: []
+      Object:
+        Volatile: true
+        Ref: rvalue
+    SwiftName: buildVolatileRValue()
+  - Name: buildObjectOnly
+    Where:
+      Object:
+        Ref: lvalue
+    SwiftName: buildObjectOnlyLValue(_:)
+  - Name: buildStatic
+    Where:
+      Parameters: []
+      Object:
----------------
j-hui wrote:

I wonder whether any `Object` field should be allowed at all for static methods, since there's nothing ever to qualify.

And perhaps a static method should be qualified as `Object: none` or `Object: static` or `Static: true`? (This should be future work though.)

https://github.com/llvm/llvm-project/pull/216148