/**
* 最小复现代码
* Qt Creator 9.0.0
* Based on Qt 6.4.1 (Clang 13.0 (Apple), arm64)
*/
#include <iostream>
#include <algorithm>
#include <vector>
class Contact {
public:
Contact(std::string name) { this->name = name; }
friend bool customSort(const Contact& lhs, const Contact& rhs) { return lhs.name < rhs.name; }
private:
std::string name;
};
class Book {
public:
void sortBookByName() {
/**
* @bug
* Semantic Issue
* Use of undeclared identifier 'customSort'
* [Source: clangd for friendTest<项目的名字>]
* 别人在 Windows Qt 上也测试过，提示错误相同
*/
std::sort(this->addressBook.begin(), this->addressBook.end(), customSort);
// 这个就是正常的
std::sort(this->addressBook.begin(), this->addressBook.end(), [](const Contact& lhs, const Contact& rhs) {
return customSort(lhs, rhs);
});
}
private:
std::vector<Contact> addressBook;
};
