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// RUN: %check_clang_tidy -std=c++20 %s readability-container-size-empty %t -- -- -fno-delayed-template-parsing
namespace std {
struct strong_ordering {
int n;
constexpr operator int() const { return n; }
static const strong_ordering equal, greater, less;
};
constexpr strong_ordering strong_ordering::equal = {0};
constexpr strong_ordering strong_ordering::greater = {1};
constexpr strong_ordering strong_ordering::less = {-1};
} // namespace std
template <typename T>
struct OpEqOnly {
OpEqOnly();
bool operator==(const OpEqOnly<T> &other) const;
unsigned long size() const;
bool empty() const;
};
template <typename T>
struct HasSpaceshipMem {
HasSpaceshipMem();
bool operator<=>(const HasSpaceshipMem<T> &other) const = default;
unsigned long size() const;
bool empty() const;
};
void returnsVoid() {
OpEqOnly<int> OEO;
HasSpaceshipMem<int> HSM;
if (OEO != OpEqOnly<int>())
;
// CHECK-MESSAGES: :[[@LINE-2]]:7: warning: the 'empty' method should be used to check for emptiness
// CHECK-FIXES: if (!OEO.empty())
// CHECK-MESSAGES: :19:8: note: method 'OpEqOnly'::empty() defined here
if (HSM != HasSpaceshipMem<int>())
;
// CHECK-MESSAGES: :[[@LINE-2]]:7: warning: the 'empty' method should be used to check for emptiness
// CHECK-FIXES: if (!HSM.empty())
// CHECK-MESSAGES: :27:8: note: method 'HasSpaceshipMem'::empty() defined here
}
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