Update GetBinaryOperator to GetOperator

resolving unary operators and operators defined within namespaces

Author: Vipul-Cariappa

include/clang/Interpreter/CppInterOp.h

@@ -37,42 +37,57 @@ namespace Cpp {
   using TInterp_t = void*;
   using TCppObject_t = void*;
 
-  enum BinaryOperator {
-    PtrMemD = 0,
-    PtrMemI,
-    Mul,
-    Div,
-    Rem,
-    Add,
-    Sub,
-    Shl,
-    Shr,
-    Cmp,
-    LT,
-    GT,
-    LE,
-    GE,
-    EQ,
-    NE,
-    And,
-    Xor,
-    Or,
-    LAnd,
-    LOr,
-    Assign,
-    MulAssign,
-    DivAssign,
-    RemAssign,
-    AddAssign,
-    SubAssign,
-    ShlAssign,
-    ShrAssign,
-    AndAssign,
-    XorAssign,
-    OrAssign,
-    Comma,
+  enum Operator {
+    OP_None,
+    OP_New,
+    OP_Delete,
+    OP_Array_New,
+    OP_Array_Delete,
+    OP_Plus,
+    OP_Minus,
+    OP_Star,
+    OP_Slash,
+    OP_Percent,
+    OP_Caret,
+    OP_Amp,
+    OP_Pipe,
+    OP_Tilde,
+    OP_Exclaim,
+    OP_Equal,
+    OP_Less,
+    OP_Greater,
+    OP_PlusEqual,
+    OP_MinusEqual,
+    OP_StarEqual,
+    OP_SlashEqual,
+    OP_PercentEqual,
+    OP_CaretEqual,
+    OP_AmpEqual,
+    OP_PipeEqual,
+    OP_LessLess,
+    OP_GreaterGreater,
+    OP_LessLessEqual,
+    OP_GreaterGreaterEqual,
+    OP_EqualEqual,
+    OP_ExclaimEqual,
+    OP_LessEqual,
+    OP_GreaterEqual,
+    OP_Spaceship,
+    OP_AmpAmp,
+    OP_PipePipe,
+    OP_PlusPlus,
+    OP_MinusMinus,
+    OP_Comma,
+    OP_ArrowStar,
+    OP_Arrow,
+    OP_Call,
+    OP_Subscript,
+    OP_Conditional,
+    OP_Coawait,
   };
 
+  enum OperatorArity { kNone, kUnary, kBinary, kBoth };
+
   /// A class modeling function calls for functions produced by the interpreter
   /// in compiled code. It provides an information if we are calling a standard
   /// function, constructor or destructor.
@@ -513,9 +528,13 @@ namespace Cpp {
   CPPINTEROP_API std::string GetFunctionArgName(TCppFunction_t func,
                                                 TCppIndex_t param_index);
 
-  ///\returns function that performs operation op on lc and rc
-  void GetBinaryOperator(TCppScope_t scope, enum BinaryOperator op,
-                         std::vector<TCppFunction_t>& operators);
+  ///\returns arity of the operator or kNone
+  OperatorArity getOperatorArity(TCppFunction_t op);
+
+  ///\returns list of operator overloads
+  void GetOperator(TCppScope_t scope, Operator op,
+                   std::vector<TCppFunction_t>& operators,
+                   OperatorArity kind = kBoth);
 
   /// Creates an instance of the interpreter we need for the various interop
   /// services.

lib/Interpreter/CppInterOp.cpp

@@ -3307,22 +3307,42 @@ namespace Cpp {
     return PI->getNameAsString();
   }
 
-  void GetBinaryOperator(TCppScope_t scope, enum BinaryOperator op,
-                         std::vector<TCppFunction_t>& operators) {
-    Decl* D = static_cast<Decl*>(scope);
-    auto* DC = llvm::dyn_cast<DeclContext>(D);
-    Scope* S = getSema().getScopeForContext(DC);
-    if (!S)
-      return;
-
-    clang::UnresolvedSet<8> lookup;
+  OperatorArity getOperatorArity(TCppFunction_t op) {
+    Decl* D = static_cast<Decl*>(op);
+    if (auto* FD = llvm::dyn_cast<FunctionDecl>(D)) {
+      if (FD->isOverloadedOperator()) {
+        switch (FD->getOverloadedOperator()) {
+#define OVERLOADED_OPERATOR(Name, Spelling, Token, Unary, Binary,            \
+                              MemberOnly)                                      \
+    case OO_##Name:                                                            \
+      if ((Unary) && (Binary))                                                 \
+        return kBoth;                                                          \
+      if (Unary)                                                               \
+        return kUnary;                                                         \
+      if (Binary)                                                              \
+        return kBinary;
+#include "clang/Basic/OperatorKinds.def"
+        default:
+          break;
+        }
+      }
+    }
+    return kNone;
+  }
 
-    getSema().LookupBinOp(S, SourceLocation(), (clang::BinaryOperatorKind)op,
-                          lookup);
+  void GetOperator(TCppScope_t scope, Operator op,
+                   std::vector<TCppFunction_t>& operators, OperatorArity kind) {
+    Decl* D = static_cast<Decl*>(scope);
+    if (auto* DC = llvm::dyn_cast_or_null<DeclContext>(D)) {
+      ASTContext& C = getSema().getASTContext();
+      DeclContextLookupResult Result =
+          DC->lookup(C.DeclarationNames.getCXXOperatorName(
+              (clang::OverloadedOperatorKind)op));
 
-    for (NamedDecl* D : lookup) {
-      if (auto* FD = llvm::dyn_cast<Decl>(D))
-        operators.push_back(FD);
+      for (auto* i : Result) {
+        if (kind & getOperatorArity(i))
+          operators.push_back(i);
+      }
     }
   }
 

unittests/CppInterOp/ScopeReflectionTest.cpp

@@ -967,7 +967,7 @@ TEST(ScopeReflectionTest, IncludeVector) {
   Interp->process(code);
 }
 
-TEST(ScopeReflectionTest, GetBinaryOperator) {
+TEST(ScopeReflectionTest, GetOperator) {
   if (llvm::sys::RunningOnValgrind())
     GTEST_SKIP() << "XFAIL due to Valgrind report";
 
@@ -988,27 +988,55 @@ TEST(ScopeReflectionTest, GetBinaryOperator) {
         return MyClass(lhs.x + rhs.x);
     }
 
+    namespace extra_ops {
+
     MyClass operator+(MyClass lhs, int rhs) {
         return MyClass(lhs.x + rhs);
     }
 
     MyClass operator+(int lhs, MyClass rhs) {
         return MyClass(lhs + rhs.x);
     }
+
+    MyClass operator~(MyClass self) {
+        return MyClass(-self.x);
+    }
+
+    }
   )";
 
   Cpp::Declare(code.c_str());
 
   std::vector<Cpp::TCppFunction_t> ops;
 
-  Cpp::GetBinaryOperator(Cpp::GetGlobalScope(), Cpp::BinaryOperator::Add, ops);
-  EXPECT_EQ(ops.size(), 3);
+  Cpp::GetOperator(Cpp::GetGlobalScope(), Cpp::Operator::OP_Plus, ops);
+  EXPECT_EQ(ops.size(), 1);
+  ops.clear();
+
+  Cpp::GetOperator(Cpp::GetGlobalScope(), Cpp::Operator::OP_Minus, ops);
+  EXPECT_EQ(ops.size(), 1);
+  ops.clear();
+
+  Cpp::GetOperator(Cpp::GetGlobalScope(), Cpp::Operator::OP_Star, ops);
+  EXPECT_EQ(ops.size(), 0);
   ops.clear();
 
-  Cpp::GetBinaryOperator(Cpp::GetGlobalScope(), Cpp::BinaryOperator::Sub, ops);
+  // operators defined within a namespace
+  Cpp::GetOperator(Cpp::GetScope("extra_ops"), Cpp::Operator::OP_Plus, ops);
+  EXPECT_EQ(ops.size(), 2);
+  ops.clear();
+
+  // unary operator
+  Cpp::GetOperator(Cpp::GetScope("extra_ops"), Cpp::Operator::OP_Tilde, ops);
   EXPECT_EQ(ops.size(), 1);
   ops.clear();
 
-  Cpp::GetBinaryOperator(Cpp::GetGlobalScope(), Cpp::BinaryOperator::Mul, ops);
+  Cpp::GetOperator(Cpp::GetScope("extra_ops"), Cpp::Operator::OP_Tilde, ops,
+                   Cpp::OperatorArity::kUnary);
+  EXPECT_EQ(ops.size(), 1);
+  ops.clear()
+
+      Cpp::GetOperator(Cpp::GetScope("extra_ops"), Cpp::Operator::OP_Tilde, ops,
+                       Cpp::OperatorArity::kBinary);
   EXPECT_EQ(ops.size(), 0);
 }