{"id":2903,"date":"2013-08-18T13:20:18","date_gmt":"2013-08-18T04:20:18","guid":{"rendered":"http:\/\/peta.okechan.net\/blog\/?p=2903"},"modified":"2013-08-18T13:20:18","modified_gmt":"2013-08-18T04:20:18","slug":"2-4-%e5%9f%ba%e6%9c%ac%e7%9a%84%e3%81%aa%e5%bc%8f%e3%81%ae%e6%a7%8b%e6%96%87%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/peta.okechan.net\/blog\/archives\/2903","title":{"rendered":"2.4. \u57fa\u672c\u7684\u306a\u5f0f\u306e\u69cb\u6587\u89e3\u6790"},"content":{"rendered":"

LLVM\u306b\u3088\u308b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u5b9f\u88c5\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u65e5\u672c\u8a9e\u8a33<\/a>
\n\u7b2c2\u7ae0 \u4e07\u83ef\u93e1: \u69cb\u6587\u89e3\u6790\u5668\u3068AST\u306e\u5b9f\u88c5
\n\u7b2c4\u7bc0 \u57fa\u672c\u7684\u306a\u5f0f\u306e\u69cb\u6587\u89e3\u6790<\/a><\/p>\n

\u51e6\u7406\u3059\u308b\u306e\u304c\u4e00\u756a\u7c21\u5358\u306a\u6570\u5024\u30ea\u30c6\u30e9\u30eb\u304b\u3089\u307e\u305a\u7740\u624b\u3059\u308b\u3002
\n\u6211\u3005\u306e\u6587\u6cd5\u306b\u304a\u3051\u308b\u5404\u69cb\u6210\u8981\u7d20\u3092\u69cb\u6587\u89e3\u6790\u3059\u308b\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u3066\u307f\u3088\u3046\u3002
\n\u6570\u5024\u30ea\u30c6\u30e9\u30eb\u7528\u3068\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n

\/\/\/ numberexpr ::= number\r\nstatic ExprAST *ParseNumberExpr() {\r\n  ExprAST *Result = new NumberExprAST(NumVal);\r\n  getNextToken(); \/\/ \u6570\u5024\u3092\u6d88\u8cbb\r\n  return Result;\r\n}<\/pre>\n
\u3053\u306e\u95a2\u6570\u306f\u3068\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u3042\u308b\u3002
\n\u73fe\u5728\u306e\u30c8\u30fc\u30af\u30f3\u304ctok_number\u306e\u5834\u5408\u306b\u3053\u306e\u95a2\u6570\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u4e8b\u3092\u60f3\u5b9a\u3057\u3066\u3044\u308b\u3002
\n\u3053\u306e\u95a2\u6570\u306f\u73fe\u5728\u306e\u6570\u5024\uff08NumVal\uff09\u3092\u8aad\u307f\u53d6\u308a\u3001NumberExprAST\u30ce\u30fc\u30c9\u3092\u751f\u6210\u3057\u3001\u5b57\u53e5\u89e3\u6790\u5668\u3092\u6b21\u306e\u30c8\u30fc\u30af\u30f3\u3078\u3068\u9032\u3081\u3001\u305d\u3057\u3066\u6700\u5f8c\u306b\u30ce\u30fc\u30c9\u3092\u8fd4\u3059\u3002
\n\u5e7e\u3064\u304b\u8208\u5473\u6df1\u3044\u70b9\u304c\u3053\u306e\u95a2\u6570\u306b\u306f\u3042\u308b\u3002
\n\u4e00\u756a\u91cd\u8981\u306a\u306e\u306f\u3001\u3053\u306e\u95a2\u6570\u304c\u3001\u51e6\u7406\u5bfe\u8c61\u306e\u69cb\u6210\u8981\u7d20\u306b\u5408\u81f4\u3059\u308b\u5168\u3066\u306e\u30c8\u30fc\u30af\u30f3\u3092\u8aad\u307f\u53d6\u308a\u3001\u5b57\u53e5\u89e3\u6790\u5668\u306e\u30d0\u30c3\u30d5\u30a1\u3092\u6b21\u306e\u30c8\u30fc\u30af\u30f3\uff08\u3053\u308c\u306f\u51e6\u7406\u5bfe\u8c61\u306e\u69cb\u6210\u8981\u7d20\u3067\u306f\u306a\u3044\uff09\u306b\u9032\u3081\u3066\u304b\u3089\u623b\u308b\u70b9\u3067\u3042\u308b\u3002
\n\u3053\u308c\u306f\u3001\u518d\u5e30\u4e0b\u964d\u69cb\u6587\u89e3\u6790\u306b\u304a\u3044\u3066\u6975\u3081\u3066\u6a19\u6e96\u7684\u306a\u65b9\u6cd5\u3067\u3042\u308b\u3002
\n\u3088\u308a\u304a\u3082\u3057\u308d\u3044\u4f8b\u3068\u3057\u3066\u3001\u4e38\u62ec\u5f27\u306f\u6b21\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3067\u304d\u308b\u3002<\/p>\n
\/\/\/ parenexpr ::= '(' \u5f0f ')'\r\nstatic ExprAST *ParseParenExpr() {\r\n  getNextToken();  \/\/ "("\u3092\u6d88\u8cbb\u3002\r\n  ExprAST *V = ParseExpression();\r\n  if (!V) return 0;\r\n\r\n  if (CurTok != ')')\r\n    return Error("expected ')'");\r\n  getNextToken();  \/\/ ")"\u3092\u6d88\u8cbb\u3002\r\n  return V;\r\n}<\/pre>\n
\u3053\u306e\u95a2\u6570\u306f\u3001\u69cb\u6587\u89e3\u6790\u5668\u306b\u3064\u3044\u3066\u306e\u8208\u5473\u6df1\u3044\u70b9\u3092\u5e7e\u3064\u304b\u793a\u3057\u3066\u3044\u308b\u3002<\/p>\n
    \n
  1. \u30a8\u30e9\u30fc\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u3092\u793a\u3057\u3066\u3044\u308b\u3002
    \n\t\u3053\u306e\u95a2\u6570\u306f\u3001\u73fe\u5728\u306e\u30c8\u30fc\u30af\u30f3\u304c”(“\u306e\u5834\u5408\u306b\u547c\u3070\u308c\u308b\u3053\u3068\u3092\u60f3\u5b9a\u3057\u3066\u3044\u308b\u304c\u3001\u526f\u6b21\u5f0f\u3092\u89e3\u6790\u3057\u305f\u5f8c\u3001”)”\u306e\u51fa\u73fe\u304c\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002
    \n\t\u4f8b\u3048\u3070\u3001”(4)”\u3067\u306f\u306a\u304f\u3066”(4 x”\u3068\u30e6\u30fc\u30b6\u30fc\u304c\u5165\u529b\u3057\u305f\u5834\u5408\u3001\u69cb\u6587\u89e3\u6790\u5668\u306f\u30a8\u30e9\u30fc\u3092\u8fd4\u3059\u3060\u308d\u3046\u3002
    \n\t\u30a8\u30e9\u30fc\u306f\u8d77\u3053\u308a\u5f97\u308b\u306e\u3067\u3001\u305d\u308c\u304c\u8d77\u304d\u305f\u3053\u3068\u3092\u793a\u3059\u65b9\u6cd5\u304c\u69cb\u6587\u89e3\u6790\u5668\u306b\u306f\u5fc5\u8981\u3068\u306a\u308b\u3002
    \n\t\u6211\u3005\u306e\u69cb\u6587\u89e3\u6790\u5668\u3067\u306f\u3001\u30a8\u30e9\u30fc\u306e\u5834\u5408\u306fnull\u3092\u8fd4\u3059\u3002<\/li>\n
  2. \u518d\u5e30\u7684\u306bParseExpression\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u3002\uff08\u3055\u3089\u306bParseExpression\u304cParseParenExpr\u3092\u547c\u3073\u51fa\u305b\u308b\u3053\u3068\u3082\u3059\u3050\u5f8c\u306b\u77e5\u308b\u3053\u3068\u306b\u306a\u308b\u3060\u308d\u3046\u3002\uff09
    \n\t\u3053\u308c\u306f\u30d1\u30ef\u30d5\u30eb\u3067\u3042\u308b\u3002
    \n\t\u306a\u305c\u306a\u3089\u518d\u5e30\u7684\u306a\u6587\u6cd5\u306e\u51e6\u7406\u3092\u53ef\u80fd\u3068\u3057\u3001\u5404\u69cb\u6210\u8981\u7d20\u3092\u3068\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u306b\u4fdd\u3064\u3053\u3068\u304c\u51fa\u6765\u308b\u304b\u3089\u3067\u3042\u308b\u3002
    \n\t\u4e38\u62ec\u5f27\u305d\u306e\u3082\u306e\u306fAST\u30ce\u30fc\u30c9\u306e\u69cb\u7bc9\u3092\u884c\u308f\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3002
    \n\t\u3053\u306e\u3088\u3046\u306a\u3084\u308a\u65b9\u306e\u5834\u5408\u3001\u4e38\u62ec\u5f27\u306e\u4e00\u756a\u91cd\u8981\u306a\u5f79\u5272\u306f\u3001\u30b0\u30eb\u30fc\u30d4\u30f3\u30b0\u306e\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u69cb\u6587\u89e3\u6790\u5668\u3092\u5c0e\u304f\u4e8b\u3067\u3042\u308b\u3002
    \n\t\u69cb\u6587\u89e3\u6790\u5668\u304cAST\u3092\u69cb\u7bc9\u3057\u3066\u3057\u307e\u3048\u3070\u3001\u4e38\u62ec\u5f27\u306f\u5fc5\u8981\u306a\u3044\u3002<\/li>\n<\/ol>\n
    \u6b21\u306f\u3001\u5909\u6570\u306e\u53c2\u7167\u3068\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u306e\u51e6\u7406\u3067\u3042\u308b\u3002<\/p>\n
    \/\/\/ identifierexpr\r\n\/\/\/   ::= identifier\r\n\/\/\/   ::= identifier '(' \u5f0f* ')'\r\nstatic ExprAST *ParseIdentifierExpr() {\r\n  std::string IdName = IdentifierStr;\r\n\r\n  getNextToken();  \/\/ \u8b58\u5225\u5b50\u3092\u6d88\u8cbb\u3002\r\n\r\n  if (CurTok != '(') \/\/ \u5358\u306a\u308b\u5909\u6570\u306e\u53c2\u7167\u3002\r\n    return new VariableExprAST(IdName);\r\n\r\n  \/\/ \u95a2\u6570\u547c\u3073\u51fa\u3057\u3002\r\n  getNextToken();  \/\/ "("\u3092\u6d88\u8cbb\u3002\r\n  std::vector<ExprAST*> Args;\r\n  if (CurTok != ')') {\r\n    while (1) {\r\n      ExprAST *Arg = ParseExpression();\r\n      if (!Arg) return 0;\r\n      Args.push_back(Arg);\r\n\r\n      if (CurTok == ')') break;\r\n\r\n      if (CurTok != ',')\r\n        return Error("Expected ')' or ',' in argument list");\r\n      getNextToken();\r\n    }\r\n  }\r\n\r\n  \/\/ \u201d)\u201d\u3092\u6d88\u8cbb\u3002\r\n  getNextToken();\r\n\r\n  return new CallExprAST(IdName, Args);\r\n}<\/pre>\n
    \u3053\u306e\u95a2\u6570\u306f\u3001\u4ed6\u306e\u95a2\u6570\u3068\u540c\u3058\u30b9\u30bf\u30a4\u30eb\u306b\u5f93\u3063\u3066\u3044\u308b\u3002\uff08\u73fe\u5728\u306e\u30c8\u30fc\u30af\u30f3\u304ctok_identifier\u306e\u5834\u5408\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u3053\u3068\u3092\u60f3\u5b9a\u3057\u3066\u3044\u308b\u3002\uff09
    \n\u3053\u306e\u95a2\u6570\u3082\u307e\u305f\u3001\u518d\u5e30\u547c\u3073\u51fa\u3057\u3084\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u542b\u3080\u3002
    \n\u3053\u306e\u95a2\u6570\u306e\u9762\u767d\u3044\u70b9\u306f\u3001\u73fe\u5728\u306e\u8b58\u5225\u5b50\u304c\u5358\u306a\u308b\u5909\u6570\u306e\u53c2\u7167\u304b\u3001\u95a2\u6570\u547c\u3073\u51fa\u3057\u306e\u5f0f\u306e\u3069\u3061\u3089\u306a\u306e\u304b\u3092\u6c7a\u5b9a\u3059\u308b\u305f\u3081\u306b\u5148\u8aad\u307f\u306e\u6280\u6cd5\u3092\u4f7f\u3063\u3066\u308b\u3053\u3068\u3067\u3042\u308b\u3002
    \n\u73fe\u5728\u306e\u8b58\u5225\u5b50\u306e\u5f8c\u306e\u30c8\u30fc\u30af\u30f3\u304c”(“\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u898b\u3066\u3001VariableExprAST\u3068CallExprAST\u306e\u3069\u3061\u3089\u304b\u9069\u3057\u305f\u307b\u3046\u306e\u30ce\u30fc\u30c9\u3092\u751f\u6210\u3059\u308b\u4e8b\u306b\u3088\u3063\u3066\u3001\u3053\u308c\u3092\u51e6\u7406\u3057\u3066\u3044\u308b\u3002<\/p>\n
    \u7c21\u5358\u306a\u5f0f\u89e3\u6790\u30ed\u30b8\u30c3\u30af\u304c\u3046\u307e\u3044\u3053\u3068\u5b8c\u6210\u3057\u305f\u306e\u3067\u3001\u305d\u308c\u3089\u3092\u3072\u3068\u3064\u306e\u30a8\u30f3\u30c8\u30ea\u30dd\u30a4\u30f3\u30c8\u306b\u7e8f\u3081\u4e0a\u3052\u305f\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3002
    \n\u6211\u3005\u306f\u3053\u308c\u3089\u306e\u5f0f\u306e\u985e\u3092\u201d\u30d7\u30e9\u30a4\u30de\u30ea\u201d\u5f0f\u3068\u547c\u3076\u3002
    \n\u305d\u306e\u7406\u7531\u306f\u3042\u3068\u306e\u7ae0\u3067\u3088\u308a\u660e\u78ba\u306b\u306a\u308b\u3060\u308d\u3046\u3002
    \n\u4efb\u610f\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u5f0f\u3092\u89e3\u6790\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5f0f\u306e\u5206\u985e\u304c\u5fc5\u8981\u3068\u306a\u308b\u3002<\/p>\n
    \/\/\/ \u30d7\u30e9\u30a4\u30de\u30ea\r\n\/\/\/   ::= identifierexpr\r\n\/\/\/   ::= numberexpr\r\n\/\/\/   ::= parenexpr\r\nstatic ExprAST *ParsePrimary() {\r\n  switch (CurTok) {\r\n  default: return Error("unknown token when expecting an expression");\r\n  case tok_identifier: return ParseIdentifierExpr();\r\n  case tok_number:     return ParseNumberExpr();\r\n  case '(':            return ParseParenExpr();\r\n  }\r\n}<\/pre>\n
    \u3053\u308c\u306b\u3088\u3063\u3066\u3001\u3053\u308c\u307e\u3067\u306e\u5e7e\u3064\u304b\u306e\u95a2\u6570\u3067CurTok\u306e\u72b6\u614b\u3092\u4eee\u5b9a\u3067\u304d\u3066\u305f\u7406\u7531\u304c\u3088\u308a\u660e\u78ba\u306b\u306a\u3063\u305f\u3002
    \n\u5148\u8aad\u307f\u306b\u3088\u3063\u3066\u3001\u3069\u306e\u7a2e\u985e\u306e\u5f0f\u3068\u3057\u3066\u8abf\u67fb\u3057\u89e3\u6790\u3055\u308c\u308b\u3079\u304d\u304b\u6c7a\u5b9a\u3059\u308b\u3002<\/p>\n
    \u3053\u308c\u3067\u57fa\u672c\u7684\u306a\u5f0f\u306f\u51e6\u7406\u53ef\u80fd\u3068\u306a\u3063\u305f\u3002
    \n\u6b21\u306b\u6211\u3005\u306f\u4e8c\u9805\u6f14\u7b97\u5f0f\uff08binary expressions\uff09\u3092\u51e6\u7406\u51fa\u6765\u308b\u3088\u3046\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002
    \n\u305d\u308c\u306f\u3061\u3087\u3063\u3068\u8907\u96d1\u3067\u3042\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    LLVM\u306b\u3088\u308b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306e\u5b9f\u88c5\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u65e5\u672c\u8a9e\u8a33<\/a>
    \n\u7b2c2\u7ae0 \u4e07\u83ef\u93e1: \u69cb\u6587\u89e3\u6790\u5668\u3068AST\u306e\u5b9f\u88c5
    \n    \u7b2c4\u7bc0 \u57fa\u672c\u7684\u306a\u5f0f\u306e\u69cb\u6587\u89e3\u6790<\/a><\/p>\n
    \u51e6\u7406\u3059\u308b\u306e\u304c\u4e00\u756a\u7c21\u5358\u306a\u6570\u5024\u30ea\u30c6\u30e9\u30eb\u304b\u3089\u307e\u305a\u7740\u624b\u3059\u308b\u3002
    \n\u6211\u3005\u306e\u6587\u6cd5\u306b\u304a\u3051\u308b\u5404\u69cb\u6210\u8981\u7d20\u3092\u69cb\u6587\u89e3\u6790\u3059\u308b\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u3066\u307f\u3088\u3046\u3002
    \n\u6570\u5024\u30ea\u30c6\u30e9\u30eb\u7528\u3068\u3057\u3066\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n
    \/\/\/ numberexpr ::= number\r\nstatic ExprAST *ParseNumberExpr() {\r\n  ExprAST *Result = new NumberExprAST(NumVal);\r\n  getNextToken(); \/\/ \u6570\u5024\u3092\u6d88\u8cbb\r\n  return Result;\r\n}<\/pre>\n
    \u3053\u306e\u95a2\u6570\u306f\u3068\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u3042\u308b\u3002
    \n\u73fe\u5728\u306e\u30c8\u30fc\u30af\u30f3\u304ctok_number\u306e\u5834\u5408\u306b\u3053\u306e\u95a2\u6570\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u4e8b\u3092\u60f3\u5b9a\u3057\u3066\u3044\u308b\u3002
    \n\u3053\u306e\u95a2\u6570\u306f\u73fe\u5728\u306e\u6570\u5024\uff08NumVal\uff09\u3092\u8aad\u307f\u53d6\u308a\u3001NumberExprAST\u30ce\u30fc\u30c9\u3092\u751f\u6210\u3057\u3001\u5b57\u53e5\u89e3\u6790\u5668\u3092\u6b21\u306e\u30c8\u30fc\u30af\u30f3\u3078\u3068\u9032\u3081\u3001\u305d\u3057\u3066\u6700\u5f8c\u306b\u30ce\u30fc\u30c9\u3092\u8fd4\u3059\u3002
    \n\u5e7e\u3064\u304b\u8208\u5473\u6df1\u3044\u70b9\u304c\u3053\u306e\u95a2\u6570\u306b\u306f\u3042\u308b\u3002
    \n\u4e00\u756a\u91cd\u8981\u306a\u306e\u306f\u3001\u3053\u306e\u95a2\u6570\u304c\u3001\u51e6\u7406\u5bfe\u8c61\u306e\u69cb\u6210\u8981\u7d20\u306b\u5408\u81f4\u3059\u308b\u5168\u3066\u306e\u30c8\u30fc\u30af\u30f3\u3092\u8aad\u307f\u53d6\u308a\u3001\u5b57\u53e5\u89e3\u6790\u5668\u306e\u30d0\u30c3\u30d5\u30a1\u3092\u6b21\u306e\u30c8\u30fc\u30af\u30f3\uff08\u3053\u308c\u306f\u51e6\u7406\u5bfe\u8c61\u306e\u69cb\u6210\u8981\u7d20\u3067\u306f\u306a\u3044\uff09\u306b\u9032\u3081\u3066\u304b\u3089\u623b\u308b\u70b9\u3067\u3042\u308b\u3002
    \n\u3053\u308c\u306f\u3001\u518d\u5e30\u4e0b\u964d\u69cb\u6587\u89e3\u6790\u306b\u304a\u3044\u3066\u6975\u3081\u3066\u6a19\u6e96\u7684\u306a\u65b9\u6cd5\u3067\u3042\u308b\u3002
    \n\u3088\u308a\u304a\u3082\u3057\u308d\u3044\u4f8b\u3068\u3057\u3066\u3001\u4e38\u62ec\u5f27\u306f\u6b21\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3067\u304d\u308b\u3002<\/p>\n
    \/\/\/ parenexpr ::= '(' \u5f0f ')'\r\nstatic ExprAST *ParseParenExpr() {\r\n  getNextToken();  \/\/ "("\u3092\u6d88\u8cbb\u3002\r\n  ExprAST *V = ParseExpression();\r\n  if (!V) return 0;\r\n\r\n  if (CurTok != ')')\r\n    return Error("expected ')'");\r\n  getNextToken();  \/\/ ")"\u3092\u6d88\u8cbb\u3002\r\n  return V;\r\n}<\/pre>\n
    \u3053\u306e\u95a2\u6570\u306f\u3001\u69cb\u6587\u89e3\u6790\u5668\u306b\u3064\u3044\u3066\u306e\u8208\u5473\u6df1\u3044\u70b9\u3092\u5e7e\u3064\u304b\u793a\u3057\u3066\u3044\u308b\u3002<\/p>\n
      \n
    1. \u30a8\u30e9\u30fc\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u3092\u793a\u3057\u3066\u3044\u308b\u3002
      \n\t\u3053\u306e\u95a2\u6570\u306f\u3001\u73fe\u5728\u306e\u30c8\u30fc\u30af\u30f3\u304c”(“\u306e\u5834\u5408\u306b\u547c\u3070\u308c\u308b\u3053\u3068\u3092\u60f3\u5b9a\u3057\u3066\u3044\u308b\u304c\u3001\u526f\u6b21\u5f0f\u3092\u89e3\u6790\u3057\u305f\u5f8c\u3001”)”\u306e\u51fa\u73fe\u304c\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002
      \n\t\u4f8b\u3048\u3070\u3001”(4)”\u3067\u306f\u306a\u304f\u3066”(4 x”\u3068\u30e6\u30fc\u30b6\u30fc\u304c\u5165\u529b\u3057\u305f\u5834\u5408\u3001\u69cb\u6587\u89e3\u6790\u5668\u306f\u30a8\u30e9\u30fc\u3092\u8fd4\u3059\u3060\u308d\u3046\u3002
      \n\t\u30a8\u30e9\u30fc\u306f\u8d77\u3053\u308a\u5f97\u308b\u306e\u3067\u3001\u305d\u308c\u304c\u8d77\u304d\u305f\u3053\u3068\u3092\u793a\u3059\u65b9\u6cd5\u304c\u69cb\u6587\u89e3\u6790\u5668\u306b\u306f\u5fc5\u8981\u3068\u306a\u308b\u3002
      \n\t\u6211\u3005\u306e\u69cb\u6587\u89e3\u6790\u5668\u3067\u306f\u3001\u30a8\u30e9\u30fc\u306e\u5834\u5408\u306fnull\u3092\u8fd4\u3059\u3002<\/li>\n
    2. \u518d\u5e30\u7684\u306bParseExpression\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u308b\u3002\uff08\u3055\u3089\u306bParseExpression\u304cParseParenExpr\u3092\u547c\u3073\u51fa\u305b\u308b\u3053\u3068\u3082\u3059\u3050\u5f8c\u306b\u77e5\u308b\u3053\u3068\u306b\u306a\u308b\u3060\u308d\u3046\u3002\uff09
      \n\t\u3053\u308c\u306f\u30d1\u30ef\u30d5\u30eb\u3067\u3042\u308b\u3002
      \n\t\u306a\u305c\u306a\u3089\u518d\u5e30\u7684\u306a\u6587\u6cd5\u306e\u51e6\u7406\u3092\u53ef\u80fd\u3068\u3057\u3001\u5404\u69cb\u6210\u8981\u7d20\u3092\u3068\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u306b\u4fdd\u3064\u3053\u3068\u304c\u51fa\u6765\u308b\u304b\u3089\u3067\u3042\u308b\u3002
      \n\t\u4e38\u62ec\u5f27\u305d\u306e\u3082\u306e\u306fAST\u30ce\u30fc\u30c9\u306e\u69cb\u7bc9\u3092\u884c\u308f\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3002
      \n\t\u3053\u306e\u3088\u3046\u306a\u3084\u308a\u65b9\u306e\u5834\u5408\u3001\u4e38\u62ec\u5f27\u306e\u4e00\u756a\u91cd\u8981\u306a\u5f79\u5272\u306f\u3001\u30b0\u30eb\u30fc\u30d4\u30f3\u30b0\u306e\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u69cb\u6587\u89e3\u6790\u5668\u3092\u5c0e\u304f\u4e8b\u3067\u3042\u308b\u3002
      \n\t\u69cb\u6587\u89e3\u6790\u5668\u304cAST\u3092\u69cb\u7bc9\u3057\u3066\u3057\u307e\u3048\u3070\u3001\u4e38\u62ec\u5f27\u306f\u5fc5\u8981\u306a\u3044\u3002<\/li>\n<\/ol>\n
      \u6b21\u306f\u3001\u5909\u6570\u306e\u53c2\u7167\u3068\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u306e\u51e6\u7406\u3067\u3042\u308b\u3002<\/p>\n
      \/\/\/ identifierexpr\r\n\/\/\/   ::= identifier\r\n\/\/\/   ::= identifier '(' \u5f0f* ')'\r\nstatic ExprAST *ParseIdentifierExpr() {\r\n  std::string IdName = IdentifierStr;\r\n\r\n  getNextToken();  \/\/ \u8b58\u5225\u5b50\u3092\u6d88\u8cbb\u3002\r\n\r\n  if (CurTok != '(') \/\/ \u5358\u306a\u308b\u5909\u6570\u306e\u53c2\u7167\u3002\r\n    return new VariableExprAST(IdName);\r\n\r\n  \/\/ \u95a2\u6570\u547c\u3073\u51fa\u3057\u3002\r\n  getNextToken();  \/\/ "("\u3092\u6d88\u8cbb\u3002\r\n  std::vector<ExprAST*> Args;\r\n  if (CurTok != ')') {\r\n    while (1) {\r\n      ExprAST *Arg = ParseExpression();\r\n      if (!Arg) return 0;\r\n      Args.push_back(Arg);\r\n\r\n      if (CurTok == ')') break;\r\n\r\n      if (CurTok != ',')\r\n        return Error("Expected ')' or ',' in argument list");\r\n      getNextToken();\r\n    }\r\n  }\r\n\r\n  \/\/ \u201d)\u201d\u3092\u6d88\u8cbb\u3002\r\n  getNextToken();\r\n\r\n  return new CallExprAST(IdName, Args);\r\n}<\/pre>\n
      \u3053\u306e\u95a2\u6570\u306f\u3001\u4ed6\u306e\u95a2\u6570\u3068\u540c\u3058\u30b9\u30bf\u30a4\u30eb\u306b\u5f93\u3063\u3066\u3044\u308b\u3002\uff08\u73fe\u5728\u306e\u30c8\u30fc\u30af\u30f3\u304ctok_identifier\u306e\u5834\u5408\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u3053\u3068\u3092\u60f3\u5b9a\u3057\u3066\u3044\u308b\u3002\uff09
      \n\u3053\u306e\u95a2\u6570\u3082\u307e\u305f\u3001\u518d\u5e30\u547c\u3073\u51fa\u3057\u3084\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u542b\u3080\u3002
      \n\u3053\u306e\u95a2\u6570\u306e\u9762\u767d\u3044\u70b9\u306f\u3001\u73fe\u5728\u306e\u8b58\u5225\u5b50\u304c\u5358\u306a\u308b\u5909\u6570\u306e\u53c2\u7167\u304b\u3001\u95a2\u6570\u547c\u3073\u51fa\u3057\u306e\u5f0f\u306e\u3069\u3061\u3089\u306a\u306e\u304b\u3092\u6c7a\u5b9a\u3059\u308b\u305f\u3081\u306b\u5148\u8aad\u307f\u306e\u6280\u6cd5\u3092\u4f7f\u3063\u3066\u308b\u3053\u3068\u3067\u3042\u308b\u3002
      \n\u73fe\u5728\u306e\u8b58\u5225\u5b50\u306e\u5f8c\u306e\u30c8\u30fc\u30af\u30f3\u304c”(“\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u898b\u3066\u3001VariableExprAST\u3068CallExprAST\u306e\u3069\u3061\u3089\u304b\u9069\u3057\u305f\u307b\u3046\u306e\u30ce\u30fc\u30c9\u3092\u751f\u6210\u3059\u308b\u4e8b\u306b\u3088\u3063\u3066\u3001\u3053\u308c\u3092\u51e6\u7406\u3057\u3066\u3044\u308b\u3002<\/p>\n
      \u7c21\u5358\u306a\u5f0f\u89e3\u6790\u30ed\u30b8\u30c3\u30af\u304c\u3046\u307e\u3044\u3053\u3068\u5b8c\u6210\u3057\u305f\u306e\u3067\u3001\u305d\u308c\u3089\u3092\u3072\u3068\u3064\u306e\u30a8\u30f3\u30c8\u30ea\u30dd\u30a4\u30f3\u30c8\u306b\u7e8f\u3081\u4e0a\u3052\u305f\u30d8\u30eb\u30d1\u30fc\u95a2\u6570\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3002
      \n\u6211\u3005\u306f\u3053\u308c\u3089\u306e\u5f0f\u306e\u985e\u3092\u201d\u30d7\u30e9\u30a4\u30de\u30ea\u201d\u5f0f\u3068\u547c\u3076\u3002
      \n\u305d\u306e\u7406\u7531\u306f\u3042\u3068\u306e\u7ae0\u3067\u3088\u308a\u660e\u78ba\u306b\u306a\u308b\u3060\u308d\u3046\u3002
      \n\u4efb\u610f\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u5f0f\u3092\u89e3\u6790\u3059\u308b\u305f\u3081\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5f0f\u306e\u5206\u985e\u304c\u5fc5\u8981\u3068\u306a\u308b\u3002<\/p>\n
      \/\/\/ \u30d7\u30e9\u30a4\u30de\u30ea\r\n\/\/\/   ::= identifierexpr\r\n\/\/\/   ::= numberexpr\r\n\/\/\/   ::= parenexpr\r\nstatic ExprAST *ParsePrimary() {\r\n  switch (CurTok) {\r\n  default: return Error("unknown token when expecting an expression");\r\n  case tok_identifier: return ParseIdentifierExpr();\r\n  case tok_number:     return ParseNumberExpr();\r\n  case '(':            return ParseParenExpr();\r\n  }\r\n}<\/pre>\n
      \u3053\u308c\u306b\u3088\u3063\u3066\u3001\u3053\u308c\u307e\u3067\u306e\u5e7e\u3064\u304b\u306e\u95a2\u6570\u3067CurTok\u306e\u72b6\u614b\u3092\u4eee\u5b9a\u3067\u304d\u3066\u305f\u7406\u7531\u304c\u3088\u308a\u660e\u78ba\u306b\u306a\u3063\u305f\u3002
      \n\u5148\u8aad\u307f\u306b\u3088\u3063\u3066\u3001\u3069\u306e\u7a2e\u985e\u306e\u5f0f\u3068\u3057\u3066\u8abf\u67fb\u3057\u89e3\u6790\u3055\u308c\u308b\u3079\u304d\u304b\u6c7a\u5b9a\u3059\u308b\u3002<\/p>\n
      \u3053\u308c\u3067\u57fa\u672c\u7684\u306a\u5f0f\u306f\u51e6\u7406\u53ef\u80fd\u3068\u306a\u3063\u305f\u3002
      \n\u6b21\u306b\u6211\u3005\u306f\u4e8c\u9805\u6f14\u7b97\u5f0f\uff08binary expressions\uff09\u3092\u51e6\u7406\u51fa\u6765\u308b\u3088\u3046\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002
      \n\u305d\u308c\u306f\u3061\u3087\u3063\u3068\u8907\u96d1\u3067\u3042\u308b\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[466,467],"class_list":["post-2903","post","type-post","status-publish","format-standard","hentry","category-tech","tag-kaleidoscope","tag-llvm"],"_links":{"self":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/posts\/2903","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/comments?post=2903"}],"version-history":[{"count":0,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/posts\/2903\/revisions"}],"wp:attachment":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/media?parent=2903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/categories?post=2903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/tags?post=2903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}