forked from OSchip/llvm-project
268 lines
7.6 KiB
C++
268 lines
7.6 KiB
C++
// RUN: %check_clang_tidy %s modernize-use-nodiscard %t -- \
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// RUN: -config="{CheckOptions: [{key: modernize-use-nodiscard.ReplacementString, value: 'NO_DISCARD'}]}" \
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// RUN: -- -std=c++17
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namespace std {
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template <class>
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class function;
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class string {};
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}
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namespace boost {
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template <class>
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class function;
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}
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#define MUST_USE_RESULT __attribute__((warn_unused_result))
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#define NO_DISCARD [[nodiscard]]
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#define NO_RETURN [[noreturn]]
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#define BOOLEAN_FUNC bool f23() const
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typedef unsigned my_unsigned;
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typedef unsigned &my_unsigned_reference;
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typedef const unsigned &my_unsigned_const_reference;
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struct NO_DISCARD NoDiscardStruct{};
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class Foo {
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public:
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using size_type = unsigned;
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bool f1() const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f1' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool f1() const;
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bool f2(int) const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f2' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool f2(int) const;
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bool f3(const int &) const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f3' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool f3(const int &) const;
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bool f4(void) const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f4' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool f4(void) const;
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// negative tests
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void f5() const;
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bool f6();
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bool f7(int &);
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bool f8(int &) const;
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bool f9(int *) const;
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bool f10(const int &, int &) const;
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NO_DISCARD bool f12() const;
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MUST_USE_RESULT bool f13() const;
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[[nodiscard]] bool f11() const;
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[[clang::warn_unused_result]] bool f11a() const;
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[[gnu::warn_unused_result]] bool f11b() const;
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bool _f20() const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function '_f20' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool _f20() const;
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NO_RETURN bool f21() const;
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~Foo();
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bool operator+=(int) const;
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// extra keywords (virtual,inline,const) on return type
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virtual bool f14() const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f14' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD virtual bool f14() const;
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const bool f15() const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f15' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD const bool f15() const;
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inline const bool f16() const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f16' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD inline const bool f16() const;
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inline const std::string &f45() const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f45' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD inline const std::string &f45() const;
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inline virtual const bool f17() const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f17' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD inline virtual const bool f17() const;
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// inline with body
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bool f18() const
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f18' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool f18() const
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{
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return true;
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}
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bool f19() const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f19' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool f19() const;
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BOOLEAN_FUNC;
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bool f24(size_type) const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f24' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool f24(size_type) const;
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bool f28(my_unsigned) const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f28' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool f28(my_unsigned) const;
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bool f29(my_unsigned_reference) const;
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bool f30(my_unsigned_const_reference) const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'f30' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool f30(my_unsigned_const_reference) const;
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template <class F>
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F f37(F a, F b) const;
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template <class F>
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bool f38(F a) const;
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bool f39(const std::function<bool()> &predicate) const;
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bool f39a(std::function<bool()> predicate) const;
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bool f39b(const std::function<bool()> predicate) const;
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bool f45(const boost::function<bool()> &predicate) const;
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bool f45a(boost::function<bool()> predicate) const;
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bool f45b(const boost::function<bool()> predicate) const;
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// Do not add ``[[nodiscard]]`` to parameter packs.
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template <class... Args>
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bool ParameterPack(Args... args) const;
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template <typename... Targs>
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bool ParameterPack2(Targs... Fargs) const;
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// Do not add ``[[nodiscard]]`` to variadic functions.
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bool VariadicFunctionTest(const int &, ...) const;
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// Do not add ``[[nodiscard]]`` to non constant static functions.
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static bool not_empty();
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// Do not add ``[[nodiscard]]`` to conversion functions.
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// explicit operator bool() const { return true; }
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// Do not add ``[[nodiscard]]`` to functions returning types marked [[nodiscard]].
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NoDiscardStruct f50() const;
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};
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// Do not add ``[[nodiscard]]`` to Lambda.
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const auto nonConstReferenceType = [] {
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return true;
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};
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auto lambda1 = [](int a, int b) { return a < b; };
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auto lambda1a = [](int a) { return a; };
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auto lambda1b = []() { return true;};
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auto get_functor = [](bool check) {
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return [&](const std::string& sr)->std::string {
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if(check){
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return std::string();
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}
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return std::string();
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};
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};
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// Do not add ``[[nodiscard]]`` to function definition.
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bool Foo::f19() const {
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return true;
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}
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template <class T>
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class Bar {
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public:
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using value_type = T;
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using reference = value_type &;
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using const_reference = const value_type &;
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// Do not add ``[[nodiscard]]`` to non explicit conversion functions.
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operator bool() const { return true; }
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bool empty() const;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: function 'empty' should be marked NO_DISCARD [modernize-use-nodiscard]
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// CHECK-FIXES: NO_DISCARD bool empty() const;
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// we cannot assume that the template parameter isn't a pointer
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bool f25(value_type) const;
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bool f27(reference) const;
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typename T::value_type f35() const;
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T f34() const;
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bool f31(T) const;
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bool f33(T &) const;
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bool f26(const_reference) const;
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bool f32(const T &) const;
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};
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template <typename _Tp, int cn>
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class Vec {
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public:
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Vec(_Tp v0, _Tp v1); //!< 2-element vector constructor
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Vec cross(const Vec &v) const;
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template <typename T2>
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operator Vec<T2, cn>() const;
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};
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template <class T>
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class Bar2 {
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public:
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typedef T value_type;
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typedef value_type &reference;
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typedef const value_type &const_reference;
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// we cannot assume that the template parameter isn't a pointer
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bool f40(value_type) const;
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bool f41(reference) const;
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value_type f42() const;
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typename T::value_type f43() const;
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bool f44(const_reference) const;
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};
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template <class T>
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bool Bar<T>::empty() const {
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return true;
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}
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// don't mark typical ``[[nodiscard]]`` candidates if the class
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// has mutable member variables
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class MutableExample {
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mutable bool m_isempty;
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public:
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bool empty() const;
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};
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