67 lines
2.8 KiB
C++
67 lines
2.8 KiB
C++
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// RUN: %check_clang_tidy %s hicpp-ignored-remove-result %t
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// RUN: %check_clang_tidy -check-suffixes=NOCAST %s hicpp-ignored-remove-result %t -- -config='{CheckOptions: {hicpp-ignored-remove-result.AllowCastToVoid: false}}'
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namespace std {
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template <typename ForwardIt, typename T>
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ForwardIt remove(ForwardIt, ForwardIt, const T &);
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template <typename ForwardIt, typename UnaryPredicate>
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ForwardIt remove_if(ForwardIt, ForwardIt, UnaryPredicate);
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template <typename ForwardIt>
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ForwardIt unique(ForwardIt, ForwardIt);
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template <class InputIt, class T>
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InputIt find(InputIt, InputIt, const T&);
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class error_code {
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};
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} // namespace std
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std::error_code errorFunc() {
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return std::error_code();
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}
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void warning() {
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std::remove(nullptr, nullptr, 1);
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// CHECK-MESSAGES: [[@LINE-1]]:3: warning: the value returned by this function should not be disregarded; neglecting it may lead to errors
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// CHECK-MESSAGES: [[@LINE-2]]:3: note: cast the expression to void to silence this warning
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// CHECK-MESSAGES-NOCAST: [[@LINE-3]]:3: warning: the value returned by this function should not be disregarded; neglecting it may lead to errors
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std::remove_if(nullptr, nullptr, nullptr);
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// CHECK-MESSAGES: [[@LINE-1]]:3: warning: the value returned by this function should not be disregarded; neglecting it may lead to errors
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// CHECK-MESSAGES: [[@LINE-2]]:3: note: cast the expression to void to silence this warning
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// CHECK-MESSAGES-NOCAST: [[@LINE-3]]:3: warning: the value returned by this function should not be disregarded; neglecting it may lead to errors
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std::unique(nullptr, nullptr);
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// CHECK-MESSAGES: [[@LINE-1]]:3: warning: the value returned by this function should not be disregarded; neglecting it may lead to errors
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// CHECK-MESSAGES: [[@LINE-2]]:3: note: cast the expression to void to silence this warning
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// CHECK-MESSAGES-NOCAST: [[@LINE-3]]:3: warning: the value returned by this function should not be disregarded; neglecting it may lead to errors
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}
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void optionalWarning() {
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// No warning unless AllowCastToVoid=false
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(void)std::remove(nullptr, nullptr, 1);
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// CHECK-MESSAGES-NOCAST: [[@LINE-1]]:9: warning: the value returned by this function should not be disregarded; neglecting it may lead to errors
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}
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void noWarning() {
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auto RemoveRetval = std::remove(nullptr, nullptr, 1);
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auto RemoveIfRetval = std::remove_if(nullptr, nullptr, nullptr);
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auto UniqueRetval = std::unique(nullptr, nullptr);
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// Verify that other checks in the baseclass are not used.
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// - no warning on std::find since the checker overrides
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// bugprone-unused-return-value's checked functions.
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std::find(nullptr, nullptr, 1);
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// - no warning on return types since the checker disable
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// bugprone-unused-return-value's checked return types.
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errorFunc();
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(void) errorFunc();
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}
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