add IsClassDefined

Author: Vipul-Cariappa

include/CppInterOp/CppInterOp.h

@@ -265,6 +265,9 @@ CPPINTEROP_API bool IsNamespace(TCppScope_t scope);
 /// Checks if the scope is a class or not.
 CPPINTEROP_API bool IsClass(TCppScope_t scope);
 
+/// Checks if the klass has a definition
+CPPINTEROP_API bool IsClassDefined(TCppScope_t klass);
+
 /// Checks if the scope is a function.
 CPPINTEROP_API bool IsFunction(TCppScope_t scope);
 

lib/CppInterOp/CppInterOp.cpp

@@ -271,6 +271,14 @@ bool IsClass(TCppScope_t scope) {
   return isa<CXXRecordDecl>(D);
 }
 
+bool IsClassDefined(TCppScope_t klass) {
+  Decl* D = static_cast<Decl*>(klass);
+  if (auto* CXXRD = llvm::dyn_cast<CXXRecordDecl>(D)) {
+    return CXXRD->hasDefinition();
+  }
+  return false;
+}
+
 bool IsFunction(TCppScope_t scope) {
   Decl* D = static_cast<Decl*>(scope);
   return isa<FunctionDecl>(D);

unittests/CppInterOp/VariableReflectionTest.cpp

@@ -308,8 +308,11 @@ TEST(VariableReflectionTest, GetVariableOffset) {
   Cpp::Declare("struct K;");
   Cpp::TCppScope_t k = Cpp::GetNamed("K");
   EXPECT_TRUE(k);
+  EXPECT_TRUE(Cpp::IsClass(k));
+  EXPECT_FALSE(Cpp::IsClassDefined(k));
 
   Cpp::Declare("struct K { int x; int y; int z; };");
+  EXPECT_TRUE(Cpp::IsClassDefined(k));
 
   datamembers.clear();
   Cpp::GetDatamembers(k, datamembers);
@@ -318,6 +321,7 @@ TEST(VariableReflectionTest, GetVariableOffset) {
   EXPECT_EQ(Cpp::GetVariableOffset(datamembers[0]), offsetof(K, x));
   EXPECT_EQ(Cpp::GetVariableOffset(datamembers[1]), offsetof(K, y));
   EXPECT_EQ(Cpp::GetVariableOffset(datamembers[2]), offsetof(K, z));
+  EXPECT_FALSE(Cpp::IsClassDefined(datamembers[2]));
 }
 
 #define CODE                                                                   \