{"url":"https://a7m.hatenablog.jp/entry/20100127/1264568985","description":"boost::optional\u306f\u901a\u5e38\u306e\u5024\u306b\u300c\u7121\u52b9\u5024\u300d\u3092\u52a0\u3048\u308b\u4ed5\u639b\u3051\u3002 \u95a2\u6570\u306a\u3069\u306e\u623b\u308a\u5024\u3067NULL\u3068\u304b0\u3068\u304b-1\u3092\u300c\u7121\u52b9\u5024\u300d\u3068\u6271\u3046\u30b1\u30fc\u30b9\u304c\u3042\u308b\u3051\u3069\u3001\u305d\u3046\u306f\u3044\u304b\u306a\u3044\u5834\u5408\u306b\u6709\u52b9\u3002 \u3042\u308b\u3044\u306f\u3001STL\u30b3\u30f3\u30c6\u30ca\u306e\u300c\u3069\u3053\u3082\u6307\u3057\u3066\u3044\u306a\u3044\u300d\u30a4\u30c6\u30ec\u30fc\u30bf\u304c\u6b32\u3057\u3044\u5834\u5408\u3068\u304b\u3002 //--------------------------------------------------------------------------- #include <vector> #include <boost/optional.hpp> #include <iostream> #pragma hdrstop #include <tc\u2026","blog_url":"https://a7m.hatenablog.jp/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fa7m.hatenablog.jp%2Fentry%2F20100127%2F1264568985\" title=\"boost::optional\u3092\u4f7f\u3063\u3066\u3001Nullable\u306a\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u5b9f\u88c5\u3059\u308b - C++Builder\u597d\u304d\u306e\u79d8\u5bc6\u57fa\u5730\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/A7M/","image_url":null,"provider_url":"https://hatena.blog","type":"rich","title":"boost::optional\u3092\u4f7f\u3063\u3066\u3001Nullable\u306a\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u5b9f\u88c5\u3059\u308b","version":"1.0","height":"190","categories":["C++ Tips"],"blog_title":"C++Builder\u597d\u304d\u306e\u79d8\u5bc6\u57fa\u5730","published":"2010-01-27 14:09:45","width":"100%","author_name":"A7M","provider_name":"Hatena Blog"}