LL(1)语法分析器

上传者: anran1208 | 上传时间: 2022-12-07 20:34:47 | 文件大小: 216KB | 文件类型: ZIP
语法分析程序用LL(1)语法分析方法。首先输入定义好的文法书写文件(所用的文法可以用LL(1)分析),先求出所输入的文法的每个非终结符是否能推出空,再分别计算非终结符号的FIRST集合,每个非终结符号的FOLLOW集合,以及每个规则的SELECT集合,并判断任意一个非终结符号的任意两个规则的SELECT集的交集是不是都为空,如果是,则输入文法符合LL(1)文法,可以进行分析。

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