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support bazel complie this project and format code.

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zhangxing
2023-03-30 00:15:11 +08:00
committed by light-city
parent 1f86192576
commit 3c8a3f259b
641 changed files with 10349 additions and 9523 deletions
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24
basic_content/pointer_refer/copy_construct.cpp
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@@ -12,24 +12,18 @@ using namespace std;
class Copyable {
public:
Copyable(){}
Copyable(const Copyable &o) {
cout << "Copied" << endl;
}
Copyable() {}
Copyable(const Copyable &o) { cout << "Copied" << endl; }
};
Copyable ReturnRvalue() {
return Copyable(); //返回一个临时对象
}
void AcceptVal(Copyable a) {
}
void AcceptRef(const Copyable& a) {
return Copyable(); // 返回一个临时对象
}
void AcceptVal(Copyable a) {}
void AcceptRef(const Copyable &a) {}
int main() {
cout << "pass by value: " << endl;
AcceptVal(ReturnRvalue()); // 应该调用两次拷贝构造函数
cout << "pass by reference: " << endl;
AcceptRef(ReturnRvalue()); //应该只调用一次拷贝构造函数
cout << "pass by value: " << endl;
AcceptVal(ReturnRvalue()); // 应该调用两次拷贝构造函数
cout << "pass by reference: " << endl;
AcceptRef(ReturnRvalue()); // 应该只调用一次拷贝构造函数
}