對(duì)于給定文法文件:
1 %token "if" "then" "else" "end" ;
2 %token "st" ;
3 %token "+" "*" ;
4
5 %start program ;
6
7 program -> if_stmt
8 ;
9
10 if_stmt -> "if" exp "then" stmt "end"
11 | "if" exp "then" stmt "else" stmt "end"
12 ;
13
14 exp -> exp1
15 ;
16
17 exp1 -> exp1 "+" exp2
18 | exp2
19 ;
20
21 exp2 -> exp2 "*" exp3
22 | exp3
23 ;
24
25 exp3 -> "{LQ}" exp1 "{RQ}"
26 | "{digit}"
27 ;
28
29 stmt -> "st"
30 ;
生成分析表得:
posted on 2010-08-28 15:28
lwch 閱讀(273)
評(píng)論(0) 編輯 收藏 引用 所屬分類:
NScript