forked from OSchip/llvm-project
104 lines
2.2 KiB
C++
104 lines
2.2 KiB
C++
// RUN: %check_clang_tidy %s bugprone-sizeof-container %t -- -- -target x86_64-unknown-unknown
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namespace std {
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typedef unsigned int size_t;
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template <typename T>
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struct basic_string {
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size_t size() const;
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};
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template <typename T>
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basic_string<T> operator+(const basic_string<T> &, const T *);
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typedef basic_string<char> string;
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template <typename T>
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struct vector {
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size_t size() const;
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};
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// std::bitset<> is not a container. sizeof() is reasonable for it.
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template <size_t N>
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struct bitset {
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size_t size() const;
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};
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// std::array<> is, well, an array. sizeof() is reasonable for it.
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template <typename T, size_t N>
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struct array {
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size_t size() const;
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};
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class fake_container1 {
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size_t size() const; // non-public
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};
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struct fake_container2 {
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size_t size(); // non-const
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};
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}
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using std::size_t;
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#define ARRAYSIZE(a) \
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((sizeof(a) / sizeof(*(a))) / static_cast<size_t>(!(sizeof(a) % sizeof(*(a)))))
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#define ARRAYSIZE2(a) \
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(((sizeof(a)) / (sizeof(*(a)))) / static_cast<size_t>(!((sizeof(a)) % (sizeof(*(a))))))
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struct string {
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std::size_t size() const;
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};
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template<typename T>
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void g(T t) {
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(void)sizeof(t);
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}
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void f() {
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string s1;
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std::string s2;
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std::vector<int> v;
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int a = 42 + sizeof(s1);
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// CHECK-MESSAGES: :[[@LINE-1]]:16: warning: sizeof() doesn't return the size of the container; did you mean .size()? [bugprone-sizeof-container]
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a = 123 * sizeof(s2);
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// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: sizeof() doesn't return the size
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a = 45 + sizeof(s2 + "asdf");
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// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: sizeof() doesn't return the size
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a = sizeof(v);
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: sizeof() doesn't return the size
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a = sizeof(std::vector<int>{});
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: sizeof() doesn't return the size
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a = sizeof(a);
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a = sizeof(int);
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a = sizeof(std::string);
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a = sizeof(std::vector<int>);
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g(s1);
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g(s2);
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g(v);
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std::fake_container1 fake1;
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std::fake_container2 fake2;
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std::bitset<7> std_bitset;
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std::array<int, 3> std_array;
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a = sizeof(fake1);
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a = sizeof(fake2);
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a = sizeof(std_bitset);
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a = sizeof(std_array);
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std::string arr[3];
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a = ARRAYSIZE(arr);
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a = ARRAYSIZE2(arr);
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a = sizeof(arr) / sizeof(arr[0]);
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(void)a;
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}
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