This revision was automatically updated to reflect the committed changes.
Closed by commit rG0e4c4c777308: [clang] Extend
__is_trivially_equality_comparable to check for hidden friends (authored by
philnik).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D151623/new/
https://reviews.llvm.org/D151623
Files:
clang/lib/AST/Type.cpp
clang/test/SemaCXX/type-traits.cpp
Index: clang/test/SemaCXX/type-traits.cpp
===================================================================
--- clang/test/SemaCXX/type-traits.cpp
+++ clang/test/SemaCXX/type-traits.cpp
@@ -3270,6 +3270,172 @@
};
static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableHasEnum));
+namespace hidden_friend {
+
+struct TriviallyEqualityComparable {
+ int i;
+ int j;
+
+ void func();
+ bool operator==(int) const { return false; }
+
+ friend bool operator==(const TriviallyEqualityComparable&, const TriviallyEqualityComparable&) = default;
+};
+static_assert(__is_trivially_equality_comparable(TriviallyEqualityComparable), "");
+
+struct TriviallyEqualityComparableNonTriviallyCopyable {
+ TriviallyEqualityComparableNonTriviallyCopyable(const TriviallyEqualityComparableNonTriviallyCopyable&);
+ ~TriviallyEqualityComparableNonTriviallyCopyable();
+ friend bool operator==(const TriviallyEqualityComparableNonTriviallyCopyable&, const TriviallyEqualityComparableNonTriviallyCopyable&) = default;
+ int i;
+};
+static_assert(__is_trivially_equality_comparable(TriviallyEqualityComparableNonTriviallyCopyable));
+
+struct NotTriviallyEqualityComparableHasPadding {
+ short i;
+ int j;
+
+ friend bool operator==(const NotTriviallyEqualityComparableHasPadding&, const NotTriviallyEqualityComparableHasPadding&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableHasPadding), "");
+
+struct NotTriviallyEqualityComparableHasFloat {
+ float i;
+ int j;
+
+ friend bool operator==(const NotTriviallyEqualityComparableHasFloat&, const NotTriviallyEqualityComparableHasFloat&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableHasFloat), "");
+
+struct NotTriviallyEqualityComparableHasTailPadding {
+ int i;
+ char j;
+
+ friend bool operator==(const NotTriviallyEqualityComparableHasTailPadding&, const NotTriviallyEqualityComparableHasTailPadding&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableHasTailPadding), "");
+
+struct NotTriviallyEqualityComparableBase : NotTriviallyEqualityComparableHasTailPadding {
+ char j;
+
+ friend bool operator==(const NotTriviallyEqualityComparableBase&, const NotTriviallyEqualityComparableBase&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableBase), "");
+
+class TriviallyEqualityComparablePaddedOutBase {
+ int i;
+ char c;
+
+public:
+ friend bool operator==(const TriviallyEqualityComparablePaddedOutBase&, const TriviallyEqualityComparablePaddedOutBase&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(TriviallyEqualityComparablePaddedOutBase), "");
+
+struct TriviallyEqualityComparablePaddedOut : TriviallyEqualityComparablePaddedOutBase {
+ char j[3];
+
+ friend bool operator==(const TriviallyEqualityComparablePaddedOut&, const TriviallyEqualityComparablePaddedOut&) = default;
+};
+static_assert(__is_trivially_equality_comparable(TriviallyEqualityComparablePaddedOut), "");
+
+struct TriviallyEqualityComparable1 {
+ char i;
+
+ friend bool operator==(const TriviallyEqualityComparable1&, const TriviallyEqualityComparable1&) = default;
+};
+static_assert(__is_trivially_equality_comparable(TriviallyEqualityComparable1));
+
+struct TriviallyEqualityComparable2 {
+ int i;
+
+ friend bool operator==(const TriviallyEqualityComparable2&, const TriviallyEqualityComparable2&) = default;
+};
+static_assert(__is_trivially_equality_comparable(TriviallyEqualityComparable2));
+
+struct NotTriviallyEqualityComparableTriviallyEqualityComparableBases
+ : TriviallyEqualityComparable1, TriviallyEqualityComparable2 {
+ friend bool operator==(const NotTriviallyEqualityComparableTriviallyEqualityComparableBases&, const NotTriviallyEqualityComparableTriviallyEqualityComparableBases&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableTriviallyEqualityComparableBases));
+
+struct NotTriviallyEqualityComparableBitfield {
+ int i : 1;
+
+ friend bool operator==(const NotTriviallyEqualityComparableBitfield&, const NotTriviallyEqualityComparableBitfield&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableBitfield));
+
+// TODO: This is trivially equality comparable
+struct NotTriviallyEqualityComparableBitfieldFilled {
+ char i : __CHAR_BIT__;
+
+ friend bool operator==(const NotTriviallyEqualityComparableBitfieldFilled&, const NotTriviallyEqualityComparableBitfieldFilled&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableBitfield));
+
+union U {
+ int i;
+
+ friend bool operator==(const U&, const U&) = default;
+};
+
+struct NotTriviallyEqualityComparableImplicitlyDeletedOperatorByUnion {
+ U u;
+
+ friend bool operator==(const NotTriviallyEqualityComparableImplicitlyDeletedOperatorByUnion&, const NotTriviallyEqualityComparableImplicitlyDeletedOperatorByUnion&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableImplicitlyDeletedOperatorByUnion));
+
+struct NotTriviallyEqualityComparableExplicitlyDeleted {
+ int i;
+
+ friend bool operator==(const NotTriviallyEqualityComparableExplicitlyDeleted&, const NotTriviallyEqualityComparableExplicitlyDeleted&) = delete;
+};
+
+struct NotTriviallyEqualityComparableImplicitlyDeletedOperatorByStruct {
+ NotTriviallyEqualityComparableExplicitlyDeleted u;
+
+ friend bool operator==(const NotTriviallyEqualityComparableImplicitlyDeletedOperatorByStruct&, const NotTriviallyEqualityComparableImplicitlyDeletedOperatorByStruct&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableImplicitlyDeletedOperatorByStruct));
+
+struct NotTriviallyEqualityComparableHasReferenceMember {
+ int& i;
+
+ friend bool operator==(const NotTriviallyEqualityComparableHasReferenceMember&, const NotTriviallyEqualityComparableHasReferenceMember&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableHasReferenceMember));
+
+enum E {
+ a,
+ b
+};
+bool operator==(E, E) { return false; }
+static_assert(!__is_trivially_equality_comparable(E));
+
+struct NotTriviallyEqualityComparableHasEnum {
+ E e;
+ friend bool operator==(const NotTriviallyEqualityComparableHasEnum&, const NotTriviallyEqualityComparableHasEnum&) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NotTriviallyEqualityComparableHasEnum));
+
+struct NonTriviallyEqualityComparableValueComparisonNonTriviallyCopyable {
+ int i;
+ NonTriviallyEqualityComparableValueComparisonNonTriviallyCopyable(const NonTriviallyEqualityComparableValueComparisonNonTriviallyCopyable&);
+
+ friend bool operator==(NonTriviallyEqualityComparableValueComparisonNonTriviallyCopyable, NonTriviallyEqualityComparableValueComparisonNonTriviallyCopyable) = default;
+};
+static_assert(!__is_trivially_equality_comparable(NonTriviallyEqualityComparableValueComparisonNonTriviallyCopyable));
+
+struct TriviallyEqualityComparableRefComparisonNonTriviallyCopyable {
+ int i;
+ TriviallyEqualityComparableRefComparisonNonTriviallyCopyable(const TriviallyEqualityComparableRefComparisonNonTriviallyCopyable&);
+
+ friend bool operator==(const TriviallyEqualityComparableRefComparisonNonTriviallyCopyable&, const TriviallyEqualityComparableRefComparisonNonTriviallyCopyable&) = default;
+};
+static_assert(__is_trivially_equality_comparable(TriviallyEqualityComparableRefComparisonNonTriviallyCopyable));
+}
+
#endif // __cplusplus >= 202002L
};
Index: clang/lib/AST/Type.cpp
===================================================================
--- clang/lib/AST/Type.cpp
+++ clang/lib/AST/Type.cpp
@@ -18,6 +18,7 @@
#include "clang/AST/Decl.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclFriend.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/DependenceFlags.h"
@@ -2640,11 +2641,21 @@
if (Decl->isUnion())
return false;
- if (llvm::none_of(Decl->methods(), [](const CXXMethodDecl *MemberFunction) {
- return MemberFunction->isOverloadedOperator() &&
- MemberFunction->getOverloadedOperator() ==
- OverloadedOperatorKind::OO_EqualEqual &&
- MemberFunction->isDefaulted();
+ auto IsDefaultedOperatorEqualEqual = [&](const FunctionDecl *Function) {
+ return Function->getOverloadedOperator() ==
+ OverloadedOperatorKind::OO_EqualEqual &&
+ Function->isDefaulted() && Function->getNumParams() > 0 &&
+ (Function->getParamDecl(0)->getType()->isReferenceType() ||
+ Decl->isTriviallyCopyable());
+ };
+
+ if (llvm::none_of(Decl->methods(), IsDefaultedOperatorEqualEqual) &&
+ llvm::none_of(Decl->friends(), [&](const FriendDecl *Friend) {
+ if (NamedDecl *ND = Friend->getFriendDecl()) {
+ return ND->isFunctionOrFunctionTemplate() &&
+ IsDefaultedOperatorEqualEqual(ND->getAsFunction());
+ }
+ return false;
}))
return false;
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