| 1 | // RUN: %check_clang_tidy -std=c++20 %s readability-container-size-empty %t -- -- -fno-delayed-template-parsing |
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| 2 | |
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| 3 | namespace std { |
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| 4 | struct strong_ordering { |
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| 5 | int n; |
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| 6 | constexpr operator int() const { return n; } |
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| 7 | static const strong_ordering equal, greater, less; |
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| 8 | }; |
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| 9 | constexpr strong_ordering strong_ordering::equal = {.n: 0}; |
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| 10 | constexpr strong_ordering strong_ordering::greater = {.n: 1}; |
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| 11 | constexpr strong_ordering strong_ordering::less = {.n: -1}; |
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| 12 | } // namespace std |
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| 13 | |
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| 14 | template <typename T> |
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| 15 | struct OpEqOnly { |
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| 16 | OpEqOnly(); |
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| 17 | bool operator==(const OpEqOnly<T> &other) const; |
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| 18 | unsigned long size() const; |
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| 19 | bool empty() const; |
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| 20 | }; |
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| 21 | |
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| 22 | template <typename T> |
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| 23 | struct HasSpaceshipMem { |
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| 24 | HasSpaceshipMem(); |
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| 25 | bool operator<=>(const HasSpaceshipMem<T> &other) const = default; |
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| 26 | unsigned long size() const; |
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| 27 | bool empty() const; |
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| 28 | }; |
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| 29 | |
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| 30 | void returnsVoid() { |
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| 31 | OpEqOnly<int> OEO; |
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| 32 | HasSpaceshipMem<int> HSM; |
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| 33 | |
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| 34 | if (OEO != OpEqOnly<int>()) |
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| 35 | ; |
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| 36 | // CHECK-MESSAGES: :[[@LINE-2]]:7: warning: the 'empty' method should be used to check for emptiness |
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| 37 | // CHECK-FIXES: {{^ }}if (!OEO.empty()){{$}} |
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| 38 | // CHECK-MESSAGES: :19:8: note: method 'OpEqOnly'::empty() defined here |
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| 39 | if (HSM != HasSpaceshipMem<int>()) |
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| 40 | ; |
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| 41 | // CHECK-MESSAGES: :[[@LINE-2]]:7: warning: the 'empty' method should be used to check for emptiness |
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| 42 | // CHECK-FIXES: {{^ }}if (!HSM.empty()){{$}} |
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| 43 | // CHECK-MESSAGES: :27:8: note: method 'HasSpaceshipMem'::empty() defined here |
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| 44 | } |
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| 45 | |
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