{"id":110195,"date":"2020-05-04T03:19:29","date_gmt":"2020-05-03T19:19:29","guid":{"rendered":"http:\/\/4563.org\/?p=110195"},"modified":"2020-05-04T03:19:29","modified_gmt":"2020-05-03T19:19:29","slug":"%e5%ae%9e%e5%9c%a8%e4%b8%8d%e6%87%82%ef%bc%8c%e6%b1%82%e9%97%ae%e8%bf%99%e6%ae%b5%e4%bb%a3%e7%a0%81%e6%98%af%e4%b8%8d%e6%98%af%e8%b8%a9%e4%ba%86%e6%9c%aa%e5%ae%9a%e4%b9%89%e8%a1%8c%e4%b8%ba%e7%9a%84","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=110195","title":{"rendered":"\u5b9e\u5728\u4e0d\u61c2\uff0c\u6c42\u95ee\u8fd9\u6bb5\u4ee3\u7801\u662f\u4e0d\u662f\u8e29\u4e86\u672a\u5b9a\u4e49\u884c\u4e3a\u7684\u5751"},"content":{"rendered":"
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\u5b9e\u5728\u4e0d\u61c2\uff0c\u6c42\u95ee\u8fd9\u6bb5\u4ee3\u7801\u662f\u4e0d\u662f\u8e29\u4e86\u672a\u5b9a\u4e49\u884c\u4e3a\u7684\u5751 <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : Caturra <\/span> <\/i> 75<\/span> <\/div>\n
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#include<iostream> #include<vector> using namespace std;  struct test {          vector<int> vec;          test() : vec(1) {}          int new_node(int i) {         int n = vec.size();         vec.push_back(i);         return n;     }          void func(int i) {         vec[0] = new_node(i);         cout << vec[0] << endl;     } };  int main() {     test t;     for(int i = 0; i < 5; i++) t.func(i);     return 0; }  <\/code><\/pre>\n
\uff08\u539f\u4ee3\u7801\u6bd4\u8f83\u590d\u6742\uff0c\u8fd9\u91cc\u7ecf\u8fc7\u5316\u7b80\uff0c\u5c31\u662fvec[0]<\/code>\u5b58\u5f53\u524d\u7684\u957f\u5ea6\uff0c\u6bcf\u6b21func<\/code>\u5c31vec<\/code>\u540e\u9762\u52a0\u4e00\u4e2a\u6570\uff09<\/p>\n
\u5b66\u7684\u5de5\u5730 C++\uff0c\u611f\u89c9\u597d\u50cf\u6ca1\u4ec0\u4e48\u7279\u522b\u7684\u5b9e\u73b0\uff0c\u4f46\u5c31\u662f\u4ea7\u751f\u5947\u602a\u7684\u95ee\u9898<\/p>\n
\u672c\u5730\u7528\u6bd4\u8f83\u65e7\u7684 G++\u4f1a\u4ea7\u751f\u8fd0\u884c\u65f6\u9519\u8bef<\/p>\n
\u800c\u627e\u4e86\u5176\u5b83\u7684\u5728\u7ebf IDE \u4e0b\uff0cC++11 \u4f1a\u8f93\u51fa<\/p>\n
0 0 3 3 5 <\/code><\/pre>\n
\u800c\u5728 C++17 \u4e0b\u662f\u6211\u6240\u671f\u671b\u7684<\/p>\n
1 2 3 4 5 <\/code><\/pre>\n
\u60f3\u95ee\u95ee V \u53cb\u4eec\u8fd9\u4e2a\u5177\u4f53\u51fa\u73b0\u7684\u95ee\u9898\u662f\u54ea\u91cc\uff0c\u8981\u600e\u6837\u624d\u80fd\u89c4\u907f\u8fd9\u79cd\u73b0\u8c61<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (7<\/span>)        <\/div>\n
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     \u8cc7\u6df1\u5927\u4f6c : May725 <\/span>  <\/div>\n
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                                                                 \u4f60\u8fd9\u8d34\u51fa\u6765\u7684\u4ee3\u7801\u6ca1\u95ee\u9898                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : Caturra <\/span>  <\/div>\n
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                                                                 @May725 \u6211\u4e5f\u89c9\u5f97\u6ca1\u95ee\u9898\uff0c\u4f46\u4e0d\u540c\u7f16\u8bd1\u5668\u7684\u8868\u73b0\u8bf4\u660e\u6211\u4ee3\u7801\u91cc\u6709\u5751                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : lcdtyph <\/span>  <\/div>\n
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                                                                 “`
    vec[0] = new_node(i);
    “`
    \u8fd9\u884c\uff0cnew_node(i)\u91cc\u9762\u6709\u5bf9 vec \u7684 expand \u64cd\u4f5c\uff0c\u8fd9\u5728 c++17 \u4e4b\u524d\u6709\u53ef\u80fd\u4f1a\u5bfc\u81f4 vec[0]\u8fd9\u4e2a\u5de6\u503c\u5931\u6548\u3002
    c++17 \u89c4\u5b9a\u4e86\u6c42\u503c\u987a\u5e8f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : wevsty <\/span>  <\/div>\n
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                                                                 \u8bd5\u4e86\u4e00\u4e0b
    icc 16.0.3 \u7ed3\u679c\u662f 12345
    clang 9.0 \u7ed3\u679c\u662f 12345
    MSVC 19.23 \u7ed3\u679c\u662f 12345
    \u53ea\u6709 gcc \u7ed9\u7684\u7ed3\u679c\u662f 00335
    \u6211\u89c9\u5f97\u5e94\u8be5\u662f\u4f60\u8fd9\u4e2a\u4ee3\u7801\u89e6\u53d1\u4e86 gcc \u7684\u4ec0\u4e48\u5947\u602a\u7684\u4f18\u5316\u6216\u8005 bug\uff0c\u4e0d\u662f\u4e00\u4e2a ub\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : lcdtyph <\/span>  <\/div>\n
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                                                                 @wevsty 
    \u8fd9\u5c31\u662f ub\uff0c\u4e0d\u8981\u968f\u4fbf\u6000\u7591\u7f16\u8bd1\u5668\u2026
    \u4f60\u53ef\u4ee5\u628a vec \u521d\u59cb\u5316\u65f6\u5019\u7684\u90a3\u4e2a\u53c2\u6570 1 \u6539\u6210 10\uff0c\u8fd9\u6837\u4fdd\u8bc1 5 \u6b21 push \u90fd\u4e0d\u4f1a\u8ba9\u5185\u90e8\u7684\u5730\u5740\u5931\u6548\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : wevsty <\/span>  <\/div>\n
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                                                                 @lcdtyph 
    \u4ed4\u7ec6\u770b\u4e86\u4e00\u4e0b\u6807\u51c6\uff0c\u786e\u5b9e C++17 \u6807\u51c6\u65b0\u589e\u4e86\u4e00\u6761\u3002
    \u6bcf\u4e2a\u7b80\u5355\u8d4b\u503c\u8868\u8fbe\u5f0f E1=E2 \u548c\u6bcf\u4e2a\u590d\u5408\u8d4b\u503c\u8868\u8fbe\u5f0f [email protected]=E2 \u4e2d\uff0cE2 \u7684\u6bcf\u4e2a\u503c\u8ba1\u7b97\u548c\u526f\u4f5c\u7528\u5747\u6309\u987a\u5e8f\u65e9\u4e8e E1 \u7684\u6bcf\u4e2a\u503c\u8ba1\u7b97\u548c\u526f\u4f5c\u7528\u3002
    \u8fd9\u4e2a\u662f\u660e\u786e\u4e86\u9700\u8981\u5148\u7b97 E2\uff0c\u4e4b\u524d\u7684\u6807\u51c6\u5e76\u6ca1\u6709\u8fd9\u6837\u7684\u8981\u6c42\uff0c\u6ca1\u6709\u8981\u6c42\u90a3\u5c31\u662f UB \u4e86\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : Caturra <\/span>  <\/div>\n
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                                                                 @lcdtyph \u611f\u8c22\uff0c\u65e7\u7f16\u8bd1\u5668\u4e3b\u52a8\u6269\u5bb9\u540e\u867d\u7136\u4e5f\u6709\u5947\u602a\u7684\u884c\u4e3a\uff0c\u4e0d\u8fc7\u8d77\u7801\u77e5\u9053\u54ea\u91cc\u51fa\u95ee\u9898\u4e86<\/p>\n
    @wevsty \u6ca1\u60f3\u5230\u8fd9\u5728 C++17 \u624d\u6709\u660e\u786e\u7684\u89c4\u5b9a\uff0c\u7b97\u662f\u5b66\u4e60\u4e86                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u5b9e\u5728\u4e0d\u61c2\uff0c\u6c42\u95ee\u8fd9\u6bb5\u4ee3\u7801\u662f\u4e0d\u662f\u8e29\u4e86\u672a…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/110195"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=110195"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/110195\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=110195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=110195"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=110195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}