[問題] 關於iteartor迴圈

看板EE_DSnP作者daniel32333 (阿軒)時間13年前 (2010/11/15 22:41)推噓14(14推 0噓 7→)

留言21則, 11人參與討論串1/1

CmdParser::printHelps()的迴圈本來是寫 CmdMap::iterator m; for(m=_cmdMap.begin();m!=_cmdMap.end();m++) 後來跑出 cmdParser.cpp:100: error: no match for ‘operator=’ in ‘m = ((const CmdParser*)this)->CmdParser::_cmdMap.std::map<_Key, _Tp, _Compare, _Alloc>::begin [with _Key = const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, _Tp = CmdExec*, _Compare = std::less<const std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, _Alloc = std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, CmdExec*> >]()’ /usr/include/c++/4.4/bits/stl_tree.h:154: note: candidates are: std::_Rb_tree_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, CmdExec*> >& std::_Rb_tree_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, CmdExec*> >::operator=(const std::_Rb_tree_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, CmdExec*> >&) 缺少operator = 的錯誤訊息之後把迴圈改成 for(CmdMap::iterator m=_cmdMap.begin();m!=_cmdMap.end();m++) 結果錯誤訊息是 cmdParser.cpp:99: error: conversion from ‘ std::_Rb_tree_const_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, CmdExec*> >’ to non-scalar type ‘std::_Rb_tree_iterator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, CmdExec*> >’ requested 請問一下問題大概是出在哪? 謝謝 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 111.184.13.168

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timrau

11/15 22:53, , 1^F

11/15 22:53, 1^F

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daniel32333

11/15 22:54, , 2^F

11/15 22:54, 2^F

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daniel32333

11/15 22:55, , 3^F

11/15 22:55, 3^F