operator==,!=,<,<=,>,>=,<=> (std::stack)

From cppreference.net

template < class T, class Container > bool operator == ( const std:: stack < T, Container > & lhs, const std:: stack < T, Container > & rhs ) ;	(1)
template < class T, class Container > bool operator ! = ( const std:: stack < T, Container > & lhs, const std:: stack < T, Container > & rhs ) ;	(2)
template < class T, class Container > bool operator < ( const std:: stack < T, Container > & lhs, const std:: stack < T, Container > & rhs ) ;	(3)
template < class T, class Container > bool operator <= ( const std:: stack < T, Container > & lhs, const std:: stack < T, Container > & rhs ) ;	(4)
template < class T, class Container > bool operator > ( const std:: stack < T, Container > & lhs, const std:: stack < T, Container > & rhs ) ;	(5)
template < class T, class Container > bool operator >= ( const std:: stack < T, Container > & lhs, const std:: stack < T, Container > & rhs ) ;	(6)
template < class T, std:: three_way_comparable Container > std:: compare_three_way_result_t < Container > operator <=> ( const std:: stack < T, Container > & lhs, const std:: stack < T, Container > & rhs ) ;	(7)	(自 C++20 起)

比较两个容器适配器底层容器的内容。该比较通过对底层容器应用相应的运算符来完成。

Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros (C++20)
Language support library
Concepts library (C++20)
Diagnostics library
Memory management library
Metaprogramming library (C++11)
General utilities library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Strings library
Text processing library
Numerics library
Date and time library
Input/output library
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
Technical specifications
Symbols index
External libraries

Member functions
stack::stack
stack::~stack
stack::operator=
Element access
stack::top
Capacity
stack::empty
stack::size
Modifiers
stack::push
stack::push_range (C++23)
stack::emplace (C++11)
stack::pop
stack::swap (C++11)
Non-member functions
swap (std::stack) (C++11)
operator== operator!= operator< operator> operator<= operator>= operator<=> (C++20)
Helper classes
uses_allocator <std::stack> (C++11)
formatter <std::stack> (C++23)
Deduction guides (C++17)

目录

lhs, rhs	-	要进行比较内容的容器适配器
- `T` 必须满足 EqualityComparable 的要求。