const 修饰成员函数体

const int kInt = 0; // kInt 不能再被赋予其他值
const int getValue(const char *key); // 返回值为不能被修改,函数体内不能修改参数的值

const int getValue(const char *key) const;

class Test {
public:
void setValue(const int value) const {
    _value = value; // error C3490: ‘_value‘ cannot be modified because it is being accessed through a const object
}
private:
int _value;
};

void test() const {
    int k = 0; // error C2270: ‘test‘ : modifiers not allowed on nonmember functions
}