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ä½ç½®ï¼é¦é¡µ > C++ åèæå >é误å¤ç >std::error_condition > operator==,!=,<,<=>(std::error_condition)
operator==,!=,<,<=>(std::error_condition)
æ¯è¾äºä¸ª error_condition ã
1) æ£æ¥
lhs ä¸ rhs æ¯å¦ç¸çã2) æ£æ¥
lhs ä¸ rhs æ¯å¦ä¸ç¸çã3) æ£æ¥
lhs æ¯å¦å°äº rhs ã4) è·å¾
lhs ä¸ rhs çä¸è·¯æ¯è¾ç»æã5) æ£æ¥
code æ¯å¦ä¸º cond çè¯ä¹å¹é
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code æ¯å¦ä¸æ¯ cond çè¯ä¹å¹é
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1) è¥é误类å«ä¸éè¯¯å¼æ¯è¾ç¸çå为 true ã
2) è¥éè¯¯ç±»å«æéè¯¯å¼æ¯è¾ä¸ç¸çå为 true ã
3) è¥å为 lhs.category() < rhs.category() ï¼ true ãå¦åè¥ lhs.category() == rhs.category() && lhs.value() < rhs.value() å为 true ãå¦å为 false ã
4) è¥ lhs.category() <=> rhs.category() ä¸ä¸º std::strong_ordering::equal å为该å¼ãå¦å为 lhs.value() <=> rhs.value() ã
5) è¥ code.category().equivalent(code.value(), cond) æ cond.category().equivalent(code, cond.value()) å为 true ã
6) è¥æ¢é code.category().equivalent(code.value(), cond) 亦é cond.category().equivalent(code, cond.value()) å为 true ã
