标签：type name other vector str 队列 font until val
以优先队列为例，从cppreference查得，它的模板为
template<
class T,
class Container = std::vector<T>,
class Compare = std::less<typename Container::value_type>
> class priority_queue;
所以我们要定义一个Compare类实现less的功能，在观察less类的内容，https://en.cppreference.com/w/cpp/utility/functional/less
std::less::operator() bool operator()( const T& lhs, const T& rhs ) const;(until C++14) constexpr bool operator()( const T& lhs, const T& rhs ) const;(since C++14) Checks whether lhs is less than rhs. Parameters lhs, rhs - values to compare Return value true if lhs < rhs, false otherwise.
constexpr bool operator()(const T &lhs, const T &rhs) const { return lhs < rhs; }
实现非常简单，只要对我们自定义的类实现operator()重载即可
标签：type name other vector str 队列 font until val
原文地址：https://www.cnblogs.com/bloomingFlower/p/9602174.html
