Implement isDeleted in new paradigm

Author: kulp

src/clang.rs

@@ -745,25 +745,12 @@ impl Cursor {
         }
     }
 
-    /// Is the referent a defaulted function?
-    pub fn is_defaulted_function(&self) -> bool {
-        unsafe { clang_CXXMethod_isDefaulted(self.x) != 0 }
-    }
-
     /// Is the referent a deleted function?
     pub fn is_deleted_function(&self) -> bool {
-        // Unfortunately, libclang doesn't yet have an API for checking if a
-        // member function is deleted, but the following should be a good
-        // enough approximation.
-        // Deleted functions are implicitly inline according to paragraph 4 of
-        // [dcl.fct.def.delete] in the C++ standard. Normal inline functions
-        // have a definition in the same translation unit, so if this is an
-        // inline function without a definition, and it's not a defaulted
-        // function, we can reasonably safely conclude that it's a deleted
-        // function.
-        self.is_inlined_function() &&
-            self.definition().is_none() &&
-            !self.is_defaulted_function()
+        match self.node {
+            ASTNode::Decl(d) => unsafe { clang_interface::Decl_isDeleted(d) },
+            _ => false,
+        }
     }
 
     /// Get the width of this cursor's referent bit field, or `None` if the

src/clang/clang_interface.hpp

@@ -108,6 +108,7 @@ bool CursorKind_isInvalid(CXCursorKind kind);
 
 const Decl *Decl_getLexicalParent(const Decl *D);
 const Decl *Decl_getSemanticParent(const Decl *D);
+bool Decl_isDeleted(const Decl *D);
 const Decl *Decl_getDefinition(const Decl *D, bool isReference);
 const Decl *Decl_getReferenced(const Decl *D);
 const Decl *Decl_getCanonical(const Decl *D);

src/clang/clang_interface.rs

@@ -7837,6 +7837,9 @@ extern "C" {
 extern "C" {
     pub fn Decl_getSemanticParent(D: *const clang_Decl) -> *const clang_Decl;
 }
+extern "C" {
+    pub fn Decl_isDeleted(D: *const clang_Decl) -> bool;
+}
 extern "C" {
     pub fn Decl_getDefinition(
         D: *const clang_Decl,

src/clang/libclang_compat.cpp

@@ -1108,6 +1108,12 @@ CXDiagnosticSeverity Diagnostic_getSeverity(const StoredDiagnostic *D) {
   llvm_unreachable("Invalid diagnostic level");
 }
 
+// Adapted from getCursorAvailabilityForDecl in CIndex.cpp
+bool Decl_isDeleted(const Decl *D)
+{
+  return isa<FunctionDecl>(D) && cast<FunctionDecl>(D)->isDeleted();
+}
+
 // Adapted from clang_getCursorDefinition in CIndex.cpp
 const Decl *Decl_getDefinition(const Decl *D, bool isReference) {
   if (!D)