Set completion priority of destructors and operators to CCP_Unlikely.

[ilya-biryukov]

Summary

It will move destructors and operators to the end of completion list.
Destructors and operators are currently very high on the completion
list, as they have the same priority as member functions. However,
they are clearly not something users usually choose in completion
lists.

[krasimir]

+1! I totally agree with this!

[ilya-biryukov]

Friendly ping. Any suggestions for other reviewers are also very welcome.

[arphaman]

Nice, LGTM

Please keep in mind that LLVM follows a weekly ping rate: https://llvm.org/docs/DeveloperPolicy.html#code-reviews .

lib/Sema/SemaCodeComplete.cpp

751

Nit: NameKind:: is redundant.

[ilya-biryukov]

• Removed redundant NameKind:: qualifiers.

[ilya-biryukov]

Thanks for the review!
Sorry for inappropriate ping, I'll make sure to stick to the policy.

lib/Sema/SemaCodeComplete.cpp

 //===---------------- SemaCodeComplete.cpp - Code Completion ----*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 //  This file defines the code-completion semantic actions.
 //
 //===----------------------------------------------------------------------===//
-#include "clang/Sema/SemaInternal.h"
+#include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclObjC.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/AST/ExprObjC.h"
 #include "clang/Basic/CharInfo.h"
 #include "clang/Lex/HeaderSearch.h"
 #include "clang/Lex/MacroInfo.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Sema/CodeCompleteConsumer.h"
 #include "clang/Sema/Lookup.h"
 #include "clang/Sema/Overload.h"
 #include "clang/Sema/Scope.h"
 #include "clang/Sema/ScopeInfo.h"
+#include "clang/Sema/SemaInternal.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/SmallBitVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Twine.h"
 #include <list>
if (const ImplicitParamDecl *ImplicitParam =
       if (ImplicitParam->getIdentifier() &&
           ImplicitParam->getIdentifier()->isStr("_cmd"))
         return CCP_ObjC_cmd;
 
     return CCP_LocalDeclaration;
   }
 
   const DeclContext *DC = ND->getDeclContext()->getRedeclContext();
-  if (DC->isRecord() || isa<ObjCContainerDecl>(DC))
+  if (DC->isRecord() || isa<ObjCContainerDecl>(DC)) {
+    // Explicit destructor calls are very rare.
+    if (isa<CXXDestructorDecl>(ND))
+      return CCP_Unlikely;
+    // Explicit operator and conversion function calls are also very rare.
+    auto DeclNameKind = ND->getDeclName().getNameKind();
+    if (DeclNameKind == DeclarationName::NameKind::CXXOperatorName ||
+        DeclNameKind == DeclarationName::NameKind::CXXLiteralOperatorName ||
+        DeclNameKind == DeclarationName::NameKind::CXXConversionFunctionName)
+      return CCP_Unlikely;
     return CCP_MemberDeclaration;
+  }
 
   // Content-based decisions.
   if (isa<EnumConstantDecl>(ND))
     return CCP_Constant;
 
   // Use CCP_Type for type declarations unless we're in a statement, Objective-C
   // message receiver, or parenthesized expression context. There, it's as
   // likely that the user will want to write a type as other declarations.

test/Index/complete-access-checks.cpp

 
 // CHECK-SUPER-ACCESS: CXXMethod:{ResultType void}{TypedText doSomething}{LeftParen (}{RightParen )} (34)
 // CHECK-SUPER-ACCESS: CXXMethod:{ResultType void}{Informative X::}{TypedText func1}{LeftParen (}{RightParen )} (36)
 // CHECK-SUPER-ACCESS: CXXMethod:{ResultType void}{Informative X::}{TypedText func2}{LeftParen (}{RightParen )} (36) (inaccessible)
 // CHECK-SUPER-ACCESS: CXXMethod:{ResultType void}{Informative X::}{TypedText func3}{LeftParen (}{RightParen )} (36) (inaccessible)
 // CHECK-SUPER-ACCESS: FieldDecl:{ResultType int}{Informative X::}{TypedText member1} (37)
 // CHECK-SUPER-ACCESS: FieldDecl:{ResultType int}{Informative X::}{TypedText member2} (37) (inaccessible)
 // CHECK-SUPER-ACCESS: FieldDecl:{ResultType int}{Informative X::}{TypedText member3} (37) (inaccessible)
-// CHECK-SUPER-ACCESS: CXXMethod:{ResultType Y &}{TypedText operator=}{LeftParen (}{Placeholder const Y &}{RightParen )} (34)
-// CHECK-SUPER-ACCESS: CXXMethod:{ResultType X &}{Text X::}{TypedText operator=}{LeftParen (}{Placeholder const X &}{RightParen )} (36)
+// CHECK-SUPER-ACCESS: CXXMethod:{ResultType Y &}{TypedText operator=}{LeftParen (}{Placeholder const Y &}{RightParen )} (79)
+// CHECK-SUPER-ACCESS: CXXMethod:{ResultType X &}{Text X::}{TypedText operator=}{LeftParen (}{Placeholder const X &}{RightParen )} (81)
 // CHECK-SUPER-ACCESS: StructDecl:{TypedText X}{Text ::} (77)
 // CHECK-SUPER-ACCESS: StructDecl:{TypedText Y}{Text ::} (75)
-// CHECK-SUPER-ACCESS: CXXDestructor:{ResultType void}{Informative X::}{TypedText ~X}{LeftParen (}{RightParen )} (36)
-// CHECK-SUPER-ACCESS: CXXDestructor:{ResultType void}{TypedText ~Y}{LeftParen (}{RightParen )} (34)
+// CHECK-SUPER-ACCESS: CXXDestructor:{ResultType void}{Informative X::}{TypedText ~X}{LeftParen (}{RightParen )} (81)
+// CHECK-SUPER-ACCESS: CXXDestructor:{ResultType void}{TypedText ~Y}{LeftParen (}{RightParen )} (79)
 
 // CHECK-ACCESS: CXXMethod:{ResultType void}{TypedText func1}{LeftParen (}{RightParen )} (34)
 // CHECK-ACCESS: CXXMethod:{ResultType void}{TypedText func2}{LeftParen (}{RightParen )} (34) (inaccessible)
 // CHECK-ACCESS: CXXMethod:{ResultType void}{TypedText func3}{LeftParen (}{RightParen )} (34) (inaccessible)
 // CHECK-ACCESS: FieldDecl:{ResultType int}{TypedText member1} (35)
 // CHECK-ACCESS: FieldDecl:{ResultType int}{TypedText member2} (35) (inaccessible)
 // CHECK-ACCESS: FieldDecl:{ResultType int}{TypedText member3} (35) (inaccessible)
-// CHECK-ACCESS: CXXMethod:{ResultType Z &}{TypedText operator=}{LeftParen (}{Placeholder const Z &}{RightParen )} (34)
+// CHECK-ACCESS: CXXMethod:{ResultType Z &}{TypedText operator=}{LeftParen (}{Placeholder const Z &}{RightParen )} (79)
 // CHECK-ACCESS: ClassDecl:{TypedText Z}{Text ::} (75)
-// CHECK-ACCESS: CXXDestructor:{ResultType void}{TypedText ~Z}{LeftParen (}{RightParen )} (34)
+// CHECK-ACCESS: CXXDestructor:{ResultType void}{TypedText ~Z}{LeftParen (}{RightParen )} (79)
 
 class P {
 protected:
   int member;
 };
 
 class Q : public P {
 public:
   using P::member;
 };
 
 void f(P x, Q y) {
   // RUN: c-index-test -code-completion-at=%s:73:5 %s | FileCheck -check-prefix=CHECK-USING-INACCESSIBLE %s
   x.; // member is inaccessible
   // RUN: c-index-test -code-completion-at=%s:75:5 %s | FileCheck -check-prefix=CHECK-USING-ACCESSIBLE %s
   y.; // member is accessible
 }
 
 // CHECK-USING-INACCESSIBLE: FieldDecl:{ResultType int}{TypedText member} (35) (inaccessible)
-// CHECK-USING-INACCESSIBLE: CXXMethod:{ResultType P &}{TypedText operator=}{LeftParen (}{Placeholder const P &}{RightParen )} (34)
+// CHECK-USING-INACCESSIBLE: CXXMethod:{ResultType P &}{TypedText operator=}{LeftParen (}{Placeholder const P &}{RightParen )} (79)
 // CHECK-USING-INACCESSIBLE: ClassDecl:{TypedText P}{Text ::} (75)
-// CHECK-USING-INACCESSIBLE: CXXDestructor:{ResultType void}{TypedText ~P}{LeftParen (}{RightParen )} (34)
+// CHECK-USING-INACCESSIBLE: CXXDestructor:{ResultType void}{TypedText ~P}{LeftParen (}{RightParen )} (79)
 
 // CHECK-USING-ACCESSIBLE: FieldDecl:{ResultType int}{TypedText member} (35)
-// CHECK-USING-ACCESSIBLE: CXXMethod:{ResultType Q &}{TypedText operator=}{LeftParen (}{Placeholder const Q &}{RightParen )} (34)
-// CHECK-USING-ACCESSIBLE: CXXMethod:{ResultType P &}{Text P::}{TypedText operator=}{LeftParen (}{Placeholder const P &}{RightParen )} (36)
+// CHECK-USING-ACCESSIBLE: CXXMethod:{ResultType Q &}{TypedText operator=}{LeftParen (}{Placeholder const Q &}{RightParen )} (79)
+// CHECK-USING-ACCESSIBLE: CXXMethod:{ResultType P &}{Text P::}{TypedText operator=}{LeftParen (}{Placeholder const P &}{RightParen )} (81)
 // CHECK-USING-ACCESSIBLE: ClassDecl:{TypedText P}{Text ::} (77)
 // CHECK-USING-ACCESSIBLE: ClassDecl:{TypedText Q}{Text ::} (75)
-// CHECK-USING-ACCESSIBLE: CXXDestructor:{ResultType void}{Informative P::}{TypedText ~P}{LeftParen (}{RightParen )} (36)
-// CHECK-USING-ACCESSIBLE: CXXDestructor:{ResultType void}{TypedText ~Q}{LeftParen (}{RightParen )} (34)
+// CHECK-USING-ACCESSIBLE: CXXDestructor:{ResultType void}{Informative P::}{TypedText ~P}{LeftParen (}{RightParen )} (81)
+// CHECK-USING-ACCESSIBLE: CXXDestructor:{ResultType void}{TypedText ~Q}{LeftParen (}{RightParen )} (79)

test/Index/complete-cxx-inline-methods.cpp

 private:
   int value;
   MyCls *object;
 };
 }
 
 // RUN: c-index-test -code-completion-at=%s:4:9 -std=c++98 %s | FileCheck %s
 // RUN: c-index-test -code-completion-at=%s:13:7 -std=c++98 %s | FileCheck %s
-// CHECK:      CXXMethod:{ResultType MyCls::Vec &}{TypedText operator=}{LeftParen (}{Placeholder const MyCls::Vec &}{RightParen )} (34)
+// CHECK:      CXXMethod:{ResultType MyCls::Vec &}{TypedText operator=}{LeftParen (}{Placeholder const MyCls::Vec &}{RightParen )} (79)
 // CHECK-NEXT: StructDecl:{TypedText Vec}{Text ::} (75)
 // CHECK-NEXT: FieldDecl:{ResultType int}{TypedText x} (35)
 // CHECK-NEXT: FieldDecl:{ResultType int}{TypedText y} (35)
-// CHECK-NEXT: CXXDestructor:{ResultType void}{TypedText ~Vec}{LeftParen (}{RightParen )} (34)
+// CHECK-NEXT: CXXDestructor:{ResultType void}{TypedText ~Vec}{LeftParen (}{RightParen )} (79)
 // CHECK-NEXT: Completion contexts:
 // CHECK-NEXT: Dot member access
 // CHECK-NEXT: Container Kind: StructDecl
 
 // RUN: c-index-test -code-completion-at=%s:18:41 %s | FileCheck -check-prefix=CHECK-CTOR-INIT %s
 // CHECK-CTOR-INIT: NotImplemented:{TypedText MyCls}{LeftParen (}{Placeholder args}{RightParen )} (7)
 // CHECK-CTOR-INIT: MemberRef:{TypedText object}{LeftParen (}{Placeholder args}{RightParen )} (35)
 // CHECK-CTOR-INIT: MemberRef:{TypedText value}{LeftParen (}{Placeholder args}{RightParen )} (35)
 // RUN: c-index-test -code-completion-at=%s:18:55 %s | FileCheck -check-prefix=CHECK-CTOR-INIT-2 %s
 // CHECK-CTOR-INIT-2-NOT: NotImplemented:{TypedText MyCls}{LeftParen (}{Placeholder args}{RightParen )}
 // CHECK-CTOR-INIT-2: MemberRef:{TypedText object}{LeftParen (}{Placeholder args}{RightParen )} (35)
 // CHECK-CTOR-INIT-2: MemberRef:{TypedText value}{LeftParen (}{Placeholder args}{RightParen )} (7)

test/Index/complete-qualified.cpp

 void foo()
 {
   Foo::
 
 // RUN: c-index-test -code-completion-at=%s:14:8 %s -o - | FileCheck -check-prefix=CHECK-CC1 %s
 // CHECK-CC1: FieldDecl:{ResultType C<Foo, class Bar>}{TypedText c} (35)
 // CHECK-CC1: ClassDecl:{TypedText Foo} (35)
 // CHECK-CC1: CXXMethod:{ResultType Foo &}{TypedText operator=}{LeftParen (}{Placeholder const Foo &}{RightParen )}
-// CHECK-CC1: CXXDestructor:{ResultType void}{TypedText ~Foo}{LeftParen (}{RightParen )} (35)
+// CHECK-CC1: CXXDestructor:{ResultType void}{TypedText ~Foo}{LeftParen (}{RightParen )} (80)

test/Index/complete-with-annotations.cpp

void X::doSomething() {
   // RUN: c-index-test -code-completion-at=%s:13:9 %s | FileCheck %s
   this->;
 }
 
 // CHECK: CXXMethod:{ResultType void}{TypedText doSomething}{LeftParen (}{RightParen )} (34)
 // CHECK: FieldDecl:{ResultType int}{TypedText field} (35) ("three", "two", "one")
 // CHECK: CXXMethod:{ResultType void}{TypedText func2}{LeftParen (}{RightParen )} (34) ("some annotation")
 // CHECK: FieldDecl:{ResultType int}{TypedText member2} (35) ("another annotation", "some annotation")
-// CHECK: CXXMethod:{ResultType X &}{TypedText operator=}{LeftParen (}{Placeholder const X &}{RightParen )} (34)
+// CHECK: CXXMethod:{ResultType X &}{TypedText operator=}{LeftParen (}{Placeholder const X &}{RightParen )} (79)
 // CHECK: ClassDecl:{TypedText X}{Text ::} (75)
-// CHECK: CXXDestructor:{ResultType void}{TypedText ~X}{LeftParen (}{RightParen )} (34)
+// CHECK: CXXDestructor:{ResultType void}{TypedText ~X}{LeftParen (}{RightParen )} (79)