forked from OSchip/llvm-project
124 lines
2.8 KiB
C++
124 lines
2.8 KiB
C++
// RUN: %check_clang_tidy %s modernize-use-emplace %t -- \
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// RUN: -config="{CheckOptions: \
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// RUN: [{key: modernize-use-emplace.IgnoreImplicitConstructors, \
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// RUN: value: 1}] \
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// RUN: }" -- -std=c++11
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namespace std {
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template <typename>
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class initializer_list
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{
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public:
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initializer_list() noexcept {}
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};
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template <typename T>
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class vector {
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public:
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vector() = default;
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vector(initializer_list<T>) {}
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void push_back(const T &) {}
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void push_back(T &&) {}
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template <typename... Args>
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void emplace_back(Args &&... args){};
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~vector();
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};
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} // namespace std
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void testInts() {
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std::vector<int> v;
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v.push_back(42);
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v.push_back(int(42));
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v.push_back(int{42});
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v.push_back(42.0);
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int z;
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v.push_back(z);
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}
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struct Something {
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Something(int a, int b = 41) {}
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Something() {}
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void push_back(Something);
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int getInt() { return 42; }
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};
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struct Convertable {
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operator Something() { return Something{}; }
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};
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struct Zoz {
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Zoz(Something, int = 42) {}
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};
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Zoz getZoz(Something s) { return Zoz(s); }
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void test_Something() {
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std::vector<Something> v;
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v.push_back(Something(1, 2));
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: use emplace_back instead of push_back [modernize-use-emplace]
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// CHECK-FIXES: v.emplace_back(1, 2);
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v.push_back(Something{1, 2});
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: use emplace_back
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// CHECK-FIXES: v.emplace_back(1, 2);
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v.push_back(Something());
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: use emplace_back
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// CHECK-FIXES: v.emplace_back();
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v.push_back(Something{});
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: use emplace_back
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// CHECK-FIXES: v.emplace_back();
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Something Different;
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v.push_back(Something(Different.getInt(), 42));
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: use emplace_back
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// CHECK-FIXES: v.emplace_back(Different.getInt(), 42);
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v.push_back(Different.getInt());
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v.push_back(42);
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Something temporary(42, 42);
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temporary.push_back(temporary);
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v.push_back(temporary);
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v.push_back(Convertable());
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v.push_back(Convertable{});
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Convertable s;
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v.push_back(s);
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}
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template <typename ElemType>
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void dependOnElem() {
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std::vector<ElemType> v;
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v.push_back(ElemType(42));
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}
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template <typename ContainerType>
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void dependOnContainer() {
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ContainerType v;
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v.push_back(Something(42));
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}
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void callDependent() {
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dependOnElem<Something>();
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dependOnContainer<std::vector<Something>>();
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}
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void test2() {
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std::vector<Zoz> v;
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v.push_back(Zoz(Something(21, 37)));
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: use emplace_back
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// CHECK-FIXES: v.emplace_back(Something(21, 37));
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v.push_back(Zoz(Something(21, 37), 42));
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: use emplace_back
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// CHECK-FIXES: v.emplace_back(Something(21, 37), 42);
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v.push_back(getZoz(Something(1, 2)));
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}
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