我試圖使用檸檬分析器生成器生成分析器表,但運行lemon grammar.y
時生成的.out
文件僅包含自動機的狀態。從檸檬語法分析器生成器生成LR分析表
有沒有辦法讓非終端的goto表,不僅是自動機的狀態? 或者這隻能通過讀取生成的代碼來完成? 是否有其他工具可以生成動作和goto表?
PS:
的.out
文件(由檸檬產生)爲一個簡單的語法看起來像這樣:
State 0:
start ::= * e
e ::= * e PLUS t
e ::= * t
t ::= * t MUL f
t ::= * f
f ::= * LPAR e RPAR
f ::= * ID
LPAR shift 1
ID shift 4
start accept
e shift 11
t shift 6
f shift 5
State 1:
e ::= * e PLUS t
e ::= * t
t ::= * t MUL f
t ::= * f
f ::= * LPAR e RPAR
f ::= LPAR * e RPAR
f ::= * ID
LPAR shift 1
ID shift 4
e shift 10
t shift 6
f shift 5
State 2:
e ::= e PLUS * t
t ::= * t MUL f
t ::= * f
f ::= * LPAR e RPAR
f ::= * ID
LPAR shift 1
ID shift 4
t shift 9
f shift 5
State 3:
t ::= t MUL * f
f ::= * LPAR e RPAR
f ::= * ID
LPAR shift 1
ID shift 4
f shift 8
State 4:
(6) f ::= ID *
$ reduce 6 f ::= ID
PLUS reduce 6 f ::= ID
MUL reduce 6 f ::= ID
RPAR reduce 6 f ::= ID
State 5:
(4) t ::= f *
$ reduce 4 t ::= f
PLUS reduce 4 t ::= f
MUL reduce 4 t ::= f
RPAR reduce 4 t ::= f
State 6:
(2) e ::= t *
t ::= t * MUL f
$ reduce 2 e ::= t
PLUS reduce 2 e ::= t
MUL shift 3
RPAR reduce 2 e ::= t
State 7:
(5) f ::= LPAR e RPAR *
$ reduce 5 f ::= LPAR e RPAR
PLUS reduce 5 f ::= LPAR e RPAR
MUL reduce 5 f ::= LPAR e RPAR
RPAR reduce 5 f ::= LPAR e RPAR
State 8:
(3) t ::= t MUL f *
$ reduce 3 t ::= t MUL f
PLUS reduce 3 t ::= t MUL f
MUL reduce 3 t ::= t MUL f
RPAR reduce 3 t ::= t MUL f
State 9:
(1) e ::= e PLUS t *
t ::= t * MUL f
$ reduce 1 e ::= e PLUS t
PLUS reduce 1 e ::= e PLUS t
MUL shift 3
RPAR reduce 1 e ::= e PLUS t
State 10:
e ::= e * PLUS t
f ::= LPAR e * RPAR
PLUS shift 2
RPAR shift 7
State 11:
(0) start ::= e *
e ::= e * PLUS t
$ reduce 0 start ::= e
PLUS shift 2
----------------------------------------------------
Symbols:
0: $:
1: PLUS
2: MUL
3: LPAR
4: RPAR
5: ID
6: error:
7: start: LPAR ID
8: e: LPAR ID
9: t: LPAR ID
10: f: LPAR ID
對我來說,這看起來像一個動作表。你在期待哪些不在輸出中? – rici
* goto表*或者可能被稱爲*跳轉表*。 – Paul
而形式'轉變'的行是什麼? –
rici