op_call.md

operator()

• memory[meta header]
• std[meta namespace]
• owner_less[meta class]
• function[meta id-type]
• cpp11[meta cpp]

// shared_ptr特殊化版
bool operator()(const shared_ptr<T>& a, const shared_ptr<T>& b) const;          // (1) C++11
bool operator()(const shared_ptr<T>& a, const shared_ptr<T>& b) const noexcept; // (1) C++17
bool operator()(const shared_ptr<T>& a, const weak_ptr<T>& b) const;            // (2) C++11
bool operator()(const shared_ptr<T>& a, const weak_ptr<T>& b) const noexcept;   // (2) C++17
bool operator()(const weak_ptr<T>& a, const shared_ptr<T>& b) const;            // (3) C++11
bool operator()(const weak_ptr<T>& a, const shared_ptr<T>& b) const noexcept;   // (3) C++17

// weak_ptr特殊化版
bool operator()(const weak_ptr<T>& a, const weak_ptr<T>& b) const;              // (4) C++11
bool operator()(const weak_ptr<T>& a, const weak_ptr<T>& b) const noexcept;     // (4) C++17
bool operator()(const shared_ptr<T>& a, const weak_ptr<T>& b) const;            // (5) C++11
bool operator()(const shared_ptr<T>& a, const weak_ptr<T>& b) const noexcept;   // (5) C++17
bool operator()(const weak_ptr<T>& a, const shared_ptr<T>& b) const;            // (6) C++11
bool operator()(const weak_ptr<T>& a, const shared_ptr<T>& b) const noexcept;   // (6) C++17

// void特殊化版
template<class T, class U>
bool operator()(const shared_ptr<T>&, const shared_ptr<U>&) const noexcept;     // (7) C++17
template<class T, class U>
bool operator()(const shared_ptr<T>&, const weak_ptr<U>&) const noexcept;       // (8) C++17
template<class T, class U>
bool operator()(const weak_ptr<T>&, const shared_ptr<U>&) const noexcept;       // (9) C++17
template<class T, class U>
bool operator()(const weak_ptr<T>&, const weak_ptr<U>&) const noexcept;         // (10) C++17

• shared_ptr[link /reference/memory/shared_ptr.md]
• weak_ptr[link /reference/memory/weak_ptr.md]

概要

所有権ベースでの小なり比較を行う。

戻り値

a.owner_before(b)

• owner_before[link /reference/memory/shared_ptr/owner_before.md]

バージョン

言語

• C++11

関連項目

• shared_ptr::owner_before()

参照

• LWG Issue 2873. Add noexcept to several shared_ptr related functions
• P0074R0 Making std::owner_less more flexible