{"id":458,"date":"2009-08-21T16:43:45","date_gmt":"2009-08-21T07:43:45","guid":{"rendered":"http:\/\/mk.miko.jp\/blog\/?p=458"},"modified":"2011-03-05T13:51:07","modified_gmt":"2011-03-05T04:51:07","slug":"%e6%99%ae%e9%80%9a%e3%81%abenable_if%e4%bd%bf%e3%81%88%e3%81%9f%e3%81%97","status":"publish","type":"post","link":"http:\/\/mk.miko.jp\/blog\/archives\/458","title":{"rendered":"\u666e\u901a\u306benable_if\u4f7f\u3048\u305f\u3057"},"content":{"rendered":"

\u3000\u666e\u901a\u306b\u8003\u3048\u3066\u4f7f\u3048\u305d\u3046\u3060\u3063\u305f\u3057\u30fc\u3002\u99ac\u9e7f\u3058\u3083\u30fc\u3093\u3002
\n\u3000\u3064\u30fc\u304b\u3001\u3061\u3083\u3093\u3068Boost\u306e\u4f8b\u6587\u901a\u308a\u306b\u66f8\u3044\u305f\u3089\u901a\u3063\u305f\u3002\u82f1\u6587\u3060\u304b\u3089\u9762\u5012\u3067\u898b\u3066\u306a\u304b\u3063\u305f\u3002<\/p>\n

\u3000\u3044\u3084\u3001\u4f55\u3067\u3053\u3093\u306a\u3093\u4f7f\u3044\u305f\u304b\u3063\u305f\u304b\u3063\u3064\u30fc\u3068\u3001\u30b9\u30ec\u30c3\u30c9\u9593\u3067\u53d7\u3051\u6e21\u3059\u306e\u306f\u7d50\u5c40\u5168\u90e8POD\u306b\u306a\u3063\u3066\u3066\u3001\u9001\u53d7\u4fe1\u306e\u6642\u306b\u7121\u7406\u77e2\u7406\u578b\u5909\u63db\u3068\u304b\u3057\u3066\u308b\u8a33\u3067\u3059\u3088\u3002\u3048\u3089\u3044\u4f4e\u30ec\u30d9\u30eb\u306b\u306a\u3063\u305f\u3088\u3046\u306a\u3002shared_ptr\u4f55\u305d\u308c\u7684\u306a\u3002
\n\u3000\u3067\u3001unsigned\u3082signed\u3082float\u3082double\u3082\u30dd\u30a4\u30f3\u30bf\u3082\u30d3\u30c3\u30c8\u5217\u5909\u63db\u7121\u3057\u306b\u51fa\u3057\u5165\u308c\u3059\u308b\u95a2\u6570\u304c\u6b32\u3057\u304f\u306a\u3063\u305f\u3002
\n\u3000enable_if\u7121\u3057\u3067\u5931\u6557\u3057\u305f\u6642\u306f\u3001\u307e\u3042\u660e\u793a\u7684\u306b\u578b\u6307\u5b9a\u306a\u308a\u95a2\u6570\u540d\u3067\u578b\u3092\u660e\u793a\u3059\u308b\u306a\u308a\u3057\u3066\u6211\u6162\u3057\u3088\u3046\u3068\u601d\u3063\u305f\u306e\u3060\u304c\u3001\u7570\u5e38\u306b\u5927\u91cf\u306e\u578b\u660e\u793a\u304c\u767a\u751f\u3057\u305f\u3002\u305d\u306e\u4e0a\u3001typedef\u3067\u96a0\u853d\u3055\u308c\u305fAPI\u5f15\u6570\u578b\u3068\u304b\u3092\u76f8\u624b\u306b\u3057\u306a\u304d\u3083\u306a\u3089\u306a\u304f\u306a\u3063\u3066\u304d\u3066\u3001\u5b9f\u969b\u306e\u578b\u3092\u78ba\u8a8d\u3057\u3066\u9069\u5408\u3059\u308b\u95a2\u6570\u3092\u6bce\u56de\u6307\u5b9a\u3059\u308b\u3068\u304b\u3084\u3063\u3066\u305f\u3089\u8272\u3005\u3068\u672c\u672b\u8ee2\u5012\u304b\u3064\u304b\u306a\u308a\u554f\u984c\u304c\u3042\u308b\u3093\u3067\u3001\u3069\u3046\u3057\u3066\u3082\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u306a\u308a\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306a\u308a\u3067\u89e3\u6c7a\u3057\u305f\u304f\u306a\u3063\u305f\u8a33\u3060\u3002boost::any\u306fvptr\u3068\u304bRTTI\u3068\u304b\u565b\u3093\u3067\u305d\u3046\u306a\u306e\u3067\u7121\u3057\u3067\u3002<\/p>\n

\u3000\u5177\u4f53\u7684\u306b\u306f\uff08\u5b9f\u7269\u3068\u306f\u3060\u3044\u3076\u9055\u3046\u3051\u3069\uff09\u3001\u307e\u305a\u3053\u3093\u306a\u611f\u3058\u306b\u66f8\u3044\u3066\u5931\u6557\u3057\u305f\u3002\u4f55\u5ea6\u76ee\u3060\u3002<\/p>\n

void set ( int t ) { set_int(t); }\r\nvoid set ( unsigned int t ) { set_uint(t); }\r\nvoid set ( float t ); \/\/ \u4ee5\u4e0b\u5b9f\u88c5\u7565\r\nvoid set ( void* t );<\/pre>\n
\u3000\u3053\u308c\u3067foo.set(uint32_data);<\/code>\u3068\u304b\u547c\u3076\u3068\u300c\u5f15\u6570t\u306funsigned int\u306a\u3093\u3060\u3051\u3069\u3001\u578b\u5909\u63db\u3059\u308c\u3070\u4f7f\u3048\u308b\u95a2\u6570\u304c\u4e09\u3064\u3082\u3042\u308b\u3088\uff01\u3000\u3069\u308c\u4f7f\u3048\u3070\u3044\u3044\u306e\uff01\u300d\u3068\u304b\u3044\u3064\u3082\u306e\u30af\u30bd\u30d0\u30ab\u306a\u30a8\u30e9\u30fc\u5410\u304f\u3093\u3067\u3001<\/p>\n
template <typename T>\r\nvoid set ( typename enable_if< is_signed<T>, T >::type t ) {\r\n  set_int(t);\r\n}\r\ntemplate <typename T>\r\nvoid set ( typename enable_if< is_unsigned<T>, T >::type t ) {\r\n  set_uint(t);\r\n}\r\n\/\/ \u4ee5\u4e0b\u7565<\/pre>\n
\u3053\u3093\u306a\u3093\u66f8\u3044\u305f\u3089\u30b3\u30f3\u30d1\u30a4\u30eb\u901a\u3063\u305f\u3002\u8aad\u307f\u51fa\u3057\u3082\u30a4\u30f3\u30e9\u30a4\u30f3\u6700\u9069\u5316\u306b\u671f\u5f85\u3057\u3066T&\u3092\u53d7\u3051\u53d6\u308b\u6c17\u6301\u3061\u60aa\u3044\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u95a2\u6570\u306b\u3057\u305f\u3002\u3053\u308c\u3067\u578b\u306e\u660e\u793a\u3082\u95a2\u6570\u540d\u66f8\u304d\u63db\u3048\u3082\u7121\u3057\u306b\u8aad\u307f\u66f8\u304d\u53ef\u80fd\u306b\u306a\u3063\u305f\u3002\u4e07\u6b73\u3002asm\u898b\u305f\u3089\u30a4\u30f3\u30e9\u30a4\u30f3\u306b\u306a\u3063\u3066\u306a\u304b\u3063\u305f\u3051\u3069\u3002\u3044\u304d\u306a\u308ajmp\u3059\u308bPROC\u3068\u304b\u3072\u3069\u3044\u306e\u304c\u51fa\u6765\u3066\u305f\uff08\u7b11\uff09\u3002\u307e\u3042\u30ea\u30f3\u30af\u30bf\u30a4\u30e0\u306e\u6700\u9069\u5316\u3082\u3042\u308b\u3057\u306a\u3002\u3068\u3044\u3046\u3088\u308a\u305d\u3053\u307e\u3067\u30b7\u30d3\u30a2\u3058\u3083\u306a\u3044\u3063\u3064\u30fc\u306b\u3002<\/p>\n
\u3000\u3064\u30fc\u304b\u3001\u3082\u3063\u3068\u3044\u3044\u624b\u306f\u7121\u3044\u3093\u3060\u308d\u3046\u304b\u3002
\n\u3000C\u7684\u306b\u8003\u3048\u308b\u3068\u3001\u30de\u30af\u30ed\u304b\u4f55\u304b\u3067(*((uint_32t*)&t))<\/code>\u3053\u3093\u306a\u3093\u306b\u5909\u63db\u3059\u308b\u3068\u304b\u3002\u30b7\u30f3\u30d7\u30eb\u3067\u306f\u3042\u308b\u306a\u3042\u3002\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u3082\u4f55\u3082\u8981\u3089\u3093\u3067\u3059\u306a\u3002\u6700\u9069\u5316\u3082\u639b\u304b\u308a\u3084\u3059\u305d\u3046\u306a\u3002\u307e\u3042\u4eca\u66f4\u304b\u3002\u4e0d\u4fbf\u3067\u5371\u967a\u3060\u3051\u3069\u30b7\u30f3\u30d7\u30eb\u3067\u50c5\u304b\u306b\u52b9\u7387\u7684\u304b\u3082\u3057\u308c\u306a\u3044\u3001\u3063\u3066\u3053\u3068\u3060\u3057\u306a\u3042\u3002
\n\u3000\u3042\u30fc\u300164-bit\u5bfe\u5fdc\u306e\u6642\u306fuint64_t\u7248\u306bifdef\u3068\u304b\u3067\u66f8\u304d\u63db\u3048\u304c\u767a\u751f\u3057\u305f\u308a\u3059\u308b\u306e\u304b\u3002\u307e\u30fc\u5927\u3057\u305f\u624b\u9593\u3067\u3082\u306a\u3044\u6c17\u306f\u3059\u308b\u304c\u3002
\n\u3000\u305d\u3046\u3044\u3048\u3070reinterpret_cast\u3082\u3084\u3063\u305f\u3051\u3069\u3001static_cast\u304c\u51fa\u6765\u308b\u6642\u306f\u305d\u3063\u3061\u3067\u3084\u308c\u3001\u3068\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u6012\u3089\u308c\u305f\u3002\u3046\u305c\u3048\uff08\u7b11\uff09\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u3000\u666e\u901a\u306b\u8003\u3048\u3066\u4f7f\u3048\u305d\u3046\u3060\u3063\u305f\u3057\u30fc\u3002\u99ac\u9e7f\u3058\u3083\u30fc\u3093\u3002 \u3000\u3064\u30fc\u304b\u3001\u3061\u3083\u3093\u3068Boost\u306e\u4f8b\u6587\u901a\u308a\u306b\u66f8\u3044\u305f\u3089\u901a\u3063\u305f\u3002\u82f1\u6587\u3060\u304b\u3089\u9762\u5012\u3067\u898b\u3066\u306a\u304b\u3063\u305f\u3002 \u3000\u3044\u3084\u3001\u4f55\u3067\u3053\u3093\u306a\u3093\u4f7f\u3044\u305f\u304b\u3063\u305f\u304b\u3063\u3064\u30fc\u3068\u3001\u30b9\u30ec\u30c3\u30c9\u9593\u3067\u53d7\u3051\u6e21\u3059\u306e\u306f\u7d50\u5c40\u5168\u90e8POD […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"http:\/\/mk.miko.jp\/blog\/wp-json\/wp\/v2\/posts\/458"}],"collection":[{"href":"http:\/\/mk.miko.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/mk.miko.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/mk.miko.jp\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/mk.miko.jp\/blog\/wp-json\/wp\/v2\/comments?post=458"}],"version-history":[{"count":0,"href":"http:\/\/mk.miko.jp\/blog\/wp-json\/wp\/v2\/posts\/458\/revisions"}],"wp:attachment":[{"href":"http:\/\/mk.miko.jp\/blog\/wp-json\/wp\/v2\/media?parent=458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/mk.miko.jp\/blog\/wp-json\/wp\/v2\/categories?post=458"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/mk.miko.jp\/blog\/wp-json\/wp\/v2\/tags?post=458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}