{"id":4109,"date":"2015-03-26T16:07:19","date_gmt":"2015-03-26T07:07:19","guid":{"rendered":"http:\/\/fry.no.coocan.jp\/WordPress\/?p=4109"},"modified":"2015-03-26T16:10:33","modified_gmt":"2015-03-26T07:10:33","slug":"%e3%83%97%e3%83%ad","status":"publish","type":"post","link":"http:\/\/fry.no.coocan.jp\/WordPress\/?p=4109","title":{"rendered":"\u30d7\u30ed"},"content":{"rendered":"<p>\u3053\u306e\u524d\u30c6\u30ec\u30d3\u3092\u898b\u3066\u3044\u305f\u3089\u300c\u702c\u6238\u5185\u6d77\u306e\u5c0f\u5cf6\u306e\u6bb5\u3005\u7551\u3067\u91ce\u83dc\u3092\u4f5c\u3063\u3066\u3044\u308b\u304a\u5a46\u3055\u3093\uff08\u591a\u520670\u4ee3\uff09\u306e\u8a71\u300d\u3092\u3084\u3063\u3066\u3044\u307e\u3057\u305f\u3002<br \/>\n\u305d\u306e\u304a\u5a46\u3055\u3093\u306f\u3001\u7956\u7236\u306e\u300c\u5730\u3092\u9019\u3063\u3066\u3001\u571f\u306e\u58f0\u3092\u805e\u3051\u300d\u3068\u3044\u3046\u8a00\u8449\u3092\u80f8\u306b\u8fb2\u696d\u3092\u7d9a\u3051\u3066\u304d\u305f\u305d\u3046\u3067\u3059\u3002<br \/>\n\u6025\u659c\u9762\u306e\u6bb5\u3005\u7551\u3067\u306e\u8fb2\u4f5c\u696d\u3092\u82e6\u306b\u601d\u3063\u305f\u3053\u3068\u306f\u306a\u304f\u3001\u6bce\u671d\u9802\u4e0a\u307e\u3067\u767b\u308b\u306e\u304c\u697d\u3057\u307f\u3060\u305d\u3046\u3067\u3059\u3002\u91ce\u83dc\u304c\u304a\u5a46\u3055\u3093\u3092\u5f85\u3063\u3066\u3044\u3066\u3001\u8449\u306e\u8272\u3092\u898b\u308b\u3068\u91ce\u83dc\u304c\u4f55\u3092\u6b32\u3057\u304c\u3063\u3066\u3044\u308b\u304b\u5206\u308b\u305d\u3046\u3067\u3059\u3002\u3059\u3054\u3044\u306a\u3001\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\uff1d\uff1d\uff1d\uff1dLL\u3068LR\u69cb\u6587\u89e3\u6790\u306e\u8a71\uff1d\uff1d\uff1d\uff1d<br \/>\nLL(k)\u6587\u6cd5\u3067\u4f5c\u3089\u308c\u305f\u8a00\u8a9e\u306b\u5bfe\u3057\u3066\u306f\u3001LL(k)\u6cd5\u3068\u3044\u3046\u69cb\u6587\u89e3\u6790\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>LL(k)\u306f\u3001\u672c\u3092\u8aad\u3080\u3068\u30b4\u30bf\u30b4\u30bf\u66f8\u3044\u3066\u3042\u3063\u3066\u3088\u304f\u5206\u308a\u307e\u305b\u3093\u3002\u30cd\u30c3\u30c8\u306b\u96f0\u56f2\u6c17\u3092\u4f1d\u3048\u308b\u3082\u306e\u304c\u3042\u3063\u305f\u306e\u3067\u3001\u3042\u308b\u672c\u306e\u8a18\u8ff0\u3068\u3064\u306a\u304e\u5408\u308f\u305b\u3066\u3001\u5206\u308a\u6613\u304f\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\uff1d\uff1d\u30cd\u30c3\u30c8\u304b\u3089\u62fe\u3046\uff1d\uff1d<br \/>\nLL(1) \u6cd5\u3068\u3044\u3046\u306e\u306f\u3001\u69cb\u6587\u306e\u306f\u3058\u3081\u306e 1 \u30c8\u30fc\u30af\u30f3\uff08\u5165\u529b\uff09\u3067\u69cb\u9020\u3092\u6c7a\u5b9a\u3057\u3066\u3044\u304f\u65b9\u6cd5\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u300cif\u300d<br \/>\n\u3063\u3066\u3044\u3046\u30c8\u30fc\u30af\u30f3\u3092\u898b\u305f\u3089\u5373\u300c\u3053\u3053\u304b\u3089if\u6587\u304c\u306f\u3058\u307e\u308b\uff01\u300d\u3068\u5224\u5b9a\u3059\u308b\u3002 <\/p>\n<p>\u307e\u305f\u3001\u3082\u3057\u300cdef\u300d<br \/>\n\u3063\u3066\u3044\u3046\u30c8\u30fc\u30af\u30f3\u3092\u898b\u305f\u3089\u300c\u95a2\u6570\u5b9a\u7fa9\uff01\u300d\u3068\u6c7a\u3081\u3064\u3051\u3061\u3083\u3046\u3002<\/p>\n<p>LL(2) \u6cd5\u306a\u3089\u3001\u306f\u3058\u3081\u306e\uff12\u30c8\u30fc\u30af\u30f3\u307e\u3067\u898b\u3066\u6c7a\u3081\u308b\u3002LL(3) \u306a\u3089\u3001\u306f\u3058\u3081\u306e\uff13\u30c8\u30fc\u30af\u30f3\u3002\u4ee5\u4e0b\u7565\u3002<\/p>\n<p>LL(k)\u6cd5\u306f\u3001\u69cb\u6587\u306e\u958b\u59cb\u3088\u308ak\u30c8\u30fc\u30af\u30f3\u5148\u307e\u3067\u8aad\u3093\u3067\u69cb\u6587\u3092\u4e88\u6e2c\u3059\u308b\u306e\u3067\u3001 \u300ck \u30c8\u30fc\u30af\u30f3\u4e88\u6e2c\u5148\u8aad\u307f (prediction look-ahead) \u3059\u308b\u300d\u306a\u3069\u3068\u8a00\u3044\u307e\u3059\u3002 <\/p>\n<p>\u9006\u306b\u3001LL(1) \u3058\u3083\u306a\u3044\u6587\u6cd5\u3082\u898b\u3066\u307f\u3088\u3046\u3002C\u8a00\u8a9e\u3002<\/p>\n<p>\u300cfoo\u300d<br \/>\n\u3063\u3066\u5148\u982d\u306e\u30c8\u30fc\u30af\u30f3\u898b\u3066\u3082\u3001\u3053\u308c\u304b\u3089 foo = 100; \u3063\u3066\u3044\u3046\u4ee3\u5165\u6587\u304c\u59cb\u307e\u308b\u306e\u304b\u3001 foo myfunc(); \u3063\u3066\u3044\u3046\u95a2\u6570\u5ba3\u8a00\u304c\u59cb\u307e\u308b\u306e\u304b\u3001\u306f\u305f\u307e\u305f foo[1](&#8220;hello&#8221;); \u3068\u3044\u3046\u914d\u5217\u30a2\u30af\u30bb\u30b9\u3057\u305f\u4e0a\u306b\u95a2\u6570\u547c\u3073\u51fa\u3057\u3068\u3044\u3046\u602a\u3057\u3052\u306a\u6587\u304c \u59cb\u307e\u308b\u306e\u304b\u3001\u307e\u3063\u305f\u304f\u4e88\u6e2c\u3067\u304d\u306a\u3044\u3002\u3053\u3046\u3044\u3046\u306e\u306f LL(1) \u3058\u3083\u306a\u3044\u3002<\/p>\n<p>\uff1d\uff1d\u3042\u308b\u672c\u304b\u3089\u62fe\u3046\uff1d\uff1d<br \/>\n\u305d\u308c\u3067\u306f\u3001\u751f\u6210\u898f\u5247(\u6587\u6cd5)\u3092\u898b\u3066LL(1)\u304b\u3069\u3046\u304b\u3092\u898b\u5206\u3051\u308b\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3088\u3044\u304b\uff1f<\/p>\n<p>\uff33-> aSc | b<\/p>\n<p>\u306fLL(1)\u3067\u3059\u3002\u4f55\u6545\u306a\u3089\u3001\uff12\u3064\u306e\u751f\u6210\u898f\u5247\uff08\uff33->aSc \u3068\u3000\uff33->b\uff09\u306e\u53f3\u8fba\u306f\u3001\u7570\u306a\u308b\u6587\u5b57\uff08 a \u3068\u3000b\uff09\u3067\u59cb\u307e\u3063\u3066\u3044\u308b\u3002\u5f93\u3063\u3066\u3001\u6700\u5de6\u5c0e\u51fa\u306e\u5404\u30b9\u30c6\u30c3\u30d7\u306f\uff11\u3064\u306e\u5165\u529b\uff08\u30c8\u30fc\u30af\u30f3\uff09\u3067\u4e00\u610f\u306b\u6c7a\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<p>\u9006\u306b\u3001LL(1)\u3067\u306a\u3044\u751f\u6210\u898f\u5247\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3042\u308b\u3002<\/p>\n<p>\uff33-> aAB<br \/>\n\uff21-> aA | a<br \/>\n\uff22-> bSc<\/p>\n<p>\u306a\u305c\u306a\u3089\u3001\uff12\u3064\u306e\u53f3\u8fba\u304ca\u3067\u59cb\u307e\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u4e00\u610f\u306b\u6c7a\u3081\u3089\u308c\u306a\u3044\u3002<\/p>\n<p>LL(1)\u306e\u69cb\u6587\u89e3\u6790\u4f8b<br \/>\n\u6b21\u306e\u6587\u6cd5\u3067aabbc\u306e\u5c0e\u51fa\u3092\u8a66\u307f\u308b\u3002<br \/>\nS->AB<br \/>\nA->aA|a<br \/>\nB->bB|c<\/p>\n<p>\u5c0e\u51fa<br \/>\nS=>AB<br \/>\n=>aAB<br \/>\n=>aaB<br \/>\n=>aabB<br \/>\n=>aabbB<br \/>\n=>aabbc<br \/>\n\u7d42\u308f\u308a<\/p>\n<p>\u6587\u6cd5\u304c\u3053\u3093\u306a\u7c21\u5358\u306a\u3089\u3001\u5c0e\u51fa\u306e\u969b\u306e\u9069\u7528\u898f\u5247\u304c\u7c21\u5358\u306b\u5206\u308a\u307e\u3059\u304c\u3001\u6587\u6cd5\u304c\u8907\u96d1\u306b\u306a\u308b\u3068\u7c21\u5358\u306b\u306f\u3044\u304d\u307e\u305b\u3093\u3002\u3069\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u3069\u306e\u751f\u6210\u898f\u5247\u3092\u9069\u7528\u3059\u308b\u306e\u304b\u306f\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u52c9\u5f37\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\uff1d\uff1d\uff1d<br \/>\nLR(1)\u306f\u3001\u5165\u529b\u6587\u306e\u304a\u5c3b\u306e\u65b9\u304b\u3089\u751f\u6210\u898f\u5247\u3092\u9069\u7528\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u5165\u529b\u3092\uff11\u30c8\u30fc\u30af\u30f3\u3065\u3064\u30b9\u30bf\u30c3\u30af\u306b\u79fb\u3057\u3001\u30b9\u30bf\u30c3\u30af\u306e\u4e0a\u306e\u65b9\u306e\u30c8\u30fc\u30af\u30f3\u306b\u751f\u6210\u898f\u5247\u3092\u5f53\u3066\u306f\u3081\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u306e\u8a73\u3057\u3044\u3084\u308a\u65b9\u3082\u30b3\u30f3\u30d1\u30a4\u30e9\u3067\u52c9\u5f37\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\uff1d\uff1d<br \/>\n\u4eca\u65e5\u306f\uff12\u9031\u9593\u3076\u308a\u3067\u30c6\u30cb\u30b9\u306b\u884c\u304d\u3001\u30df\u30c3\u30af\u30b9\u30c0\u30d6\u30eb\u30b9\u3092\uff11\u30b2\u30fc\u30e0\u3084\u3063\u3066\u5e30\u3063\u3066\u304d\u307e\u3057\u305f\u3002\u4e00\u898b\uff19\uff18\uff05\u306e\u56de\u5fa9\u3067\u3059\u304c\u3001\u307e\u3060\u672c\u8abf\u5b50\u3058\u3083\u306a\u3044\u3067\u3059\u306d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u524d\u30c6\u30ec\u30d3\u3092\u898b\u3066\u3044\u305f\u3089\u300c\u702c\u6238\u5185\u6d77\u306e\u5c0f\u5cf6\u306e\u6bb5\u3005\u7551\u3067\u91ce\u83dc\u3092\u4f5c\u3063\u3066\u3044\u308b\u304a\u5a46\u3055\u3093\uff08\u591a\u520670\u4ee3\uff09\u306e\u8a71\u300d\u3092\u3084\u3063\u3066\u3044\u307e\u3057\u305f\u3002 \u305d\u306e\u304a\u5a46\u3055\u3093\u306f\u3001\u7956\u7236\u306e\u300c\u5730\u3092\u9019\u3063\u3066\u3001\u571f\u306e\u58f0\u3092\u805e\u3051\u300d\u3068\u3044\u3046\u8a00\u8449\u3092\u80f8\u306b\u8fb2\u696d\u3092\u7d9a\u3051\u3066\u304d\u305f\u305d\u3046\u3067\u3059\u3002 \u6025\u659c\u9762\u306e\u6bb5\u3005 &hellip; <a href=\"http:\/\/fry.no.coocan.jp\/WordPress\/?p=4109\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/posts\/4109"}],"collection":[{"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4109"}],"version-history":[{"count":3,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/posts\/4109\/revisions"}],"predecessor-version":[{"id":4111,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=\/wp\/v2\/posts\/4109\/revisions\/4111"}],"wp:attachment":[{"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4109"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/fry.no.coocan.jp\/WordPress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}