Index: bindings/python/clang/cindex.py
===================================================================
--- bindings/python/clang/cindex.py
+++ bindings/python/clang/cindex.py
@@ -1478,6 +1478,12 @@
         """
         return conf.lib.clang_CXXMethod_isVirtual(self)
 
+    def is_abstract_record(self):
+        """Returns True if the cursor refers to a C++ record declaration
+        that has pure virtual member functions.
+        """
+        return conf.lib.clang_CXXRecord_isAbstract(self)
+
     def is_scoped_enum(self):
         """Returns True if the cursor refers to a scoped enum declaration.
         """
@@ -3319,6 +3325,10 @@
    [Cursor],
    bool),
 
+  ("clang_CXXRecord_isAbstract",
+   [Cursor],
+   bool),
+
   ("clang_EnumDecl_isScoped",
    [Cursor],
    bool),
Index: bindings/python/tests/cindex/test_cursor.py
===================================================================
--- bindings/python/tests/cindex/test_cursor.py
+++ bindings/python/tests/cindex/test_cursor.py
@@ -255,6 +255,17 @@
     assert foo.is_virtual_method()
     assert not bar.is_virtual_method()
 
+def test_is_abstract_record():
+    """Ensure Cursor.is_abstract_record works."""
+    source = 'struct X { virtual void x() = 0; }; struct Y : X { void x(); };'
+    tu = get_tu(source, lang='cpp')
+
+    cls = get_cursor(tu, 'X')
+    assert cls.is_abstract_record()
+
+    cls = get_cursor(tu, 'Y')
+    assert not cls.is_abstract_record()
+
 def test_is_scoped_enum():
     """Ensure Cursor.is_scoped_enum works."""
     source = 'class X {}; enum RegularEnum {}; enum class ScopedEnum {};'
Index: include/clang-c/Index.h
===================================================================
--- include/clang-c/Index.h
+++ include/clang-c/Index.h
@@ -4418,6 +4418,12 @@
  */
 CINDEX_LINKAGE unsigned clang_CXXMethod_isVirtual(CXCursor C);
 
+/**
+ * \brief Determine if a C++ record is abstract, i.e. whether a class or struct
+ * has a pure virtual member function.
+ */
+CINDEX_LINKAGE unsigned clang_CXXRecord_isAbstract(CXCursor C);
+
 /**
  * \brief Determine if an enum declaration refers to a scoped enum.
  */
Index: test/Index/load-classes.cpp
===================================================================
--- test/Index/load-classes.cpp
+++ test/Index/load-classes.cpp
@@ -29,7 +29,7 @@
 }
 
 // RUN: c-index-test -test-load-source all %s | FileCheck %s
-// CHECK: load-classes.cpp:3:8: StructDecl=X:3:8 (Definition) Extent=[3:1 - 26:2]
+// CHECK: load-classes.cpp:3:8: StructDecl=X:3:8 (Definition) (abstract) Extent=[3:1 - 26:2]
 // CHECK: load-classes.cpp:4:3: CXXConstructor=X:4:3 (converting constructor) Extent=[4:3 - 4:15] [access=public]
 // FIXME: missing TypeRef in the constructor name
 // CHECK: load-classes.cpp:4:9: ParmDecl=value:4:9 (Definition) Extent=[4:5 - 4:14]
Index: tools/c-index-test/c-index-test.c
===================================================================
--- tools/c-index-test/c-index-test.c
+++ tools/c-index-test/c-index-test.c
@@ -804,6 +804,8 @@
       printf(" (const)");
     if (clang_CXXMethod_isPureVirtual(Cursor))
       printf(" (pure)");
+    if (clang_CXXRecord_isAbstract(Cursor))
+      printf(" (abstract)");
     if (clang_EnumDecl_isScoped(Cursor))
       printf(" (scoped)");
     if (clang_Cursor_isVariadic(Cursor))
Index: tools/libclang/CIndex.cpp
===================================================================
--- tools/libclang/CIndex.cpp
+++ tools/libclang/CIndex.cpp
@@ -7846,6 +7846,17 @@
   return (Method && Method->isVirtual()) ? 1 : 0;
 }
 
+unsigned clang_CXXRecord_isAbstract(CXCursor C) {
+  if (!clang_isDeclaration(C.kind))
+    return 0;
+
+  const auto *D = cxcursor::getCursorDecl(C);
+  const auto *RD = dyn_cast_or_null<CXXRecordDecl>(D);
+  if (RD)
+    RD = RD->getDefinition();
+  return (RD && RD->isAbstract()) ? 1 : 0;
+}
+
 unsigned clang_EnumDecl_isScoped(CXCursor C) {
   if (!clang_isDeclaration(C.kind))
     return 0;
Index: tools/libclang/libclang.exports
===================================================================
--- tools/libclang/libclang.exports
+++ tools/libclang/libclang.exports
@@ -12,6 +12,7 @@
 clang_CXXMethod_isPureVirtual
 clang_CXXMethod_isStatic
 clang_CXXMethod_isVirtual
+clang_CXXRecord_isAbstract
 clang_EnumDecl_isScoped
 clang_Cursor_getArgument
 clang_Cursor_getNumTemplateArguments