今天我遇到了这段代码(在boost/type_index/type_index_facade.hpp文件的252-259行)。
/// noexcept comparison operators for type_index_facade classes.
bool operator ==, !=, <, ... (const type_index_facade& lhs, const type_index_facade& rhs) noexcept;
/// noexcept comparison operators for type_index_facade and it's TypeInfo classes.
bool operator ==, !=, <, ... (const type_index_facade& lhs, const TypeInfo& rhs) noexcept;
/// noexcept comparison operators for type_index_facade's TypeInfo and type_index_facade classes.
bool operator ==, !=, <, ... (const TypeInfo& lhs, const type_index_facade& rhs) noexcept;
有人能解释一下这是什么意思吗?我以前从没见过像“==,!=,<”这样的东西。