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https://github.com/freebsd/freebsd-src
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![Baptiste Daroussin](/assets/img/avatar_default.png)
Among all the modifications, this new byacc also solves a 14 year old bug [1] PR: bin/23254 [1] Submitted by: marka@nominum.com [1] MFC after: 3 weeks
878 lines
15 KiB
Plaintext
878 lines
15 KiB
Plaintext
0 $accept : line $end
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1 lines :
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2 | lines line
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3 line : dexp '\n'
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4 | vexp '\n'
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5 | DREG '=' dexp '\n'
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6 | VREG '=' vexp '\n'
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7 | error '\n'
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8 dexp : CONST
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9 | DREG
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10 | dexp '+' dexp
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11 | dexp '-' dexp
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12 | dexp '*' dexp
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13 | dexp '/' dexp
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14 | '-' dexp
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15 | '(' dexp ')'
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16 vexp : dexp
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17 | '(' dexp ',' dexp ')'
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18 | VREG
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19 | vexp '+' vexp
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20 | dexp '+' vexp
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21 | vexp '-' vexp
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22 | dexp '-' vexp
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23 | vexp '*' vexp
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24 | dexp '*' vexp
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25 | vexp '/' vexp
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26 | dexp '/' vexp
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27 | '-' vexp
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28 | '(' vexp ')'
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state 0
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$accept : . line $end (0)
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error shift 1
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DREG shift 2
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VREG shift 3
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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line goto 7
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dexp goto 8
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vexp goto 9
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state 1
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line : error . '\n' (7)
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'\n' shift 10
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. error
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state 2
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line : DREG . '=' dexp '\n' (5)
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dexp : DREG . (9)
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'=' shift 11
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'+' reduce 9
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'-' reduce 9
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'*' reduce 9
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'/' reduce 9
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'\n' reduce 9
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state 3
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line : VREG . '=' vexp '\n' (6)
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vexp : VREG . (18)
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'=' shift 12
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'+' reduce 18
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'-' reduce 18
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'*' reduce 18
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'/' reduce 18
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'\n' reduce 18
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state 4
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dexp : CONST . (8)
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. reduce 8
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state 5
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dexp : '-' . dexp (14)
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vexp : '-' . vexp (27)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 15
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vexp goto 16
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state 6
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dexp : '(' . dexp ')' (15)
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vexp : '(' . dexp ',' dexp ')' (17)
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vexp : '(' . vexp ')' (28)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 17
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vexp goto 18
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state 7
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$accept : line . $end (0)
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$end accept
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8: shift/reduce conflict (shift 19, reduce 16) on '+'
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8: shift/reduce conflict (shift 20, reduce 16) on '-'
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8: shift/reduce conflict (shift 21, reduce 16) on '*'
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8: shift/reduce conflict (shift 22, reduce 16) on '/'
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8: shift/reduce conflict (shift 23, reduce 16) on '\n'
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state 8
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line : dexp . '\n' (3)
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dexp : dexp . '+' dexp (10)
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dexp : dexp . '-' dexp (11)
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dexp : dexp . '*' dexp (12)
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dexp : dexp . '/' dexp (13)
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vexp : dexp . (16)
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vexp : dexp . '+' vexp (20)
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vexp : dexp . '-' vexp (22)
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vexp : dexp . '*' vexp (24)
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vexp : dexp . '/' vexp (26)
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'+' shift 19
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'-' shift 20
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'*' shift 21
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'/' shift 22
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'\n' shift 23
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state 9
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line : vexp . '\n' (4)
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vexp : vexp . '+' vexp (19)
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vexp : vexp . '-' vexp (21)
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vexp : vexp . '*' vexp (23)
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vexp : vexp . '/' vexp (25)
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'+' shift 24
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'-' shift 25
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'*' shift 26
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'/' shift 27
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'\n' shift 28
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. error
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state 10
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line : error '\n' . (7)
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. reduce 7
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state 11
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line : DREG '=' . dexp '\n' (5)
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DREG shift 13
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CONST shift 4
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'-' shift 29
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'(' shift 30
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. error
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dexp goto 31
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state 12
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line : VREG '=' . vexp '\n' (6)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 32
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vexp goto 33
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state 13
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dexp : DREG . (9)
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. reduce 9
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state 14
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vexp : VREG . (18)
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. reduce 18
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15: reduce/reduce conflict (reduce 14, reduce 16) on '+'
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15: reduce/reduce conflict (reduce 14, reduce 16) on '-'
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15: reduce/reduce conflict (reduce 14, reduce 16) on '*'
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15: reduce/reduce conflict (reduce 14, reduce 16) on '/'
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15: reduce/reduce conflict (reduce 14, reduce 16) on '\n'
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15: reduce/reduce conflict (reduce 14, reduce 16) on ')'
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state 15
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dexp : dexp . '+' dexp (10)
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dexp : dexp . '-' dexp (11)
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dexp : dexp . '*' dexp (12)
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dexp : dexp . '/' dexp (13)
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dexp : '-' dexp . (14)
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vexp : dexp . (16)
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vexp : dexp . '+' vexp (20)
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vexp : dexp . '-' vexp (22)
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vexp : dexp . '*' vexp (24)
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vexp : dexp . '/' vexp (26)
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. reduce 14
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state 16
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vexp : vexp . '+' vexp (19)
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vexp : vexp . '-' vexp (21)
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vexp : vexp . '*' vexp (23)
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vexp : vexp . '/' vexp (25)
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vexp : '-' vexp . (27)
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. reduce 27
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17: shift/reduce conflict (shift 19, reduce 16) on '+'
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17: shift/reduce conflict (shift 20, reduce 16) on '-'
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17: shift/reduce conflict (shift 21, reduce 16) on '*'
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17: shift/reduce conflict (shift 22, reduce 16) on '/'
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17: shift/reduce conflict (shift 34, reduce 16) on ')'
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state 17
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dexp : dexp . '+' dexp (10)
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dexp : dexp . '-' dexp (11)
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dexp : dexp . '*' dexp (12)
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dexp : dexp . '/' dexp (13)
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dexp : '(' dexp . ')' (15)
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vexp : dexp . (16)
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vexp : '(' dexp . ',' dexp ')' (17)
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vexp : dexp . '+' vexp (20)
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vexp : dexp . '-' vexp (22)
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vexp : dexp . '*' vexp (24)
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vexp : dexp . '/' vexp (26)
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'+' shift 19
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'-' shift 20
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'*' shift 21
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'/' shift 22
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')' shift 34
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',' shift 35
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state 18
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vexp : vexp . '+' vexp (19)
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vexp : vexp . '-' vexp (21)
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vexp : vexp . '*' vexp (23)
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vexp : vexp . '/' vexp (25)
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vexp : '(' vexp . ')' (28)
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'+' shift 24
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'-' shift 25
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'*' shift 26
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'/' shift 27
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')' shift 36
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. error
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state 19
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dexp : dexp '+' . dexp (10)
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vexp : dexp '+' . vexp (20)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 37
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vexp goto 38
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state 20
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dexp : dexp '-' . dexp (11)
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vexp : dexp '-' . vexp (22)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 39
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vexp goto 40
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state 21
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dexp : dexp '*' . dexp (12)
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vexp : dexp '*' . vexp (24)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 41
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vexp goto 42
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state 22
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dexp : dexp '/' . dexp (13)
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vexp : dexp '/' . vexp (26)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 43
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vexp goto 44
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state 23
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line : dexp '\n' . (3)
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. reduce 3
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state 24
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vexp : vexp '+' . vexp (19)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 32
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vexp goto 45
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state 25
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vexp : vexp '-' . vexp (21)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 32
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vexp goto 46
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state 26
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vexp : vexp '*' . vexp (23)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 32
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vexp goto 47
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state 27
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vexp : vexp '/' . vexp (25)
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DREG shift 13
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VREG shift 14
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CONST shift 4
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'-' shift 5
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'(' shift 6
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. error
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dexp goto 32
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vexp goto 48
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state 28
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line : vexp '\n' . (4)
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. reduce 4
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state 29
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dexp : '-' . dexp (14)
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DREG shift 13
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CONST shift 4
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'-' shift 29
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'(' shift 30
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. error
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dexp goto 49
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state 30
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dexp : '(' . dexp ')' (15)
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DREG shift 13
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CONST shift 4
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'-' shift 29
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'(' shift 30
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. error
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dexp goto 50
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state 31
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line : DREG '=' dexp . '\n' (5)
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dexp : dexp . '+' dexp (10)
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dexp : dexp . '-' dexp (11)
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dexp : dexp . '*' dexp (12)
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dexp : dexp . '/' dexp (13)
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'+' shift 51
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'-' shift 52
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'*' shift 53
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'/' shift 54
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'\n' shift 55
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. error
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32: shift/reduce conflict (shift 19, reduce 16) on '+'
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32: shift/reduce conflict (shift 20, reduce 16) on '-'
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32: shift/reduce conflict (shift 21, reduce 16) on '*'
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32: shift/reduce conflict (shift 22, reduce 16) on '/'
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state 32
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dexp : dexp . '+' dexp (10)
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dexp : dexp . '-' dexp (11)
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dexp : dexp . '*' dexp (12)
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dexp : dexp . '/' dexp (13)
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vexp : dexp . (16)
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vexp : dexp . '+' vexp (20)
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vexp : dexp . '-' vexp (22)
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vexp : dexp . '*' vexp (24)
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vexp : dexp . '/' vexp (26)
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'+' shift 19
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'-' shift 20
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'*' shift 21
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'/' shift 22
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'\n' reduce 16
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')' reduce 16
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state 33
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line : VREG '=' vexp . '\n' (6)
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vexp : vexp . '+' vexp (19)
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vexp : vexp . '-' vexp (21)
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vexp : vexp . '*' vexp (23)
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vexp : vexp . '/' vexp (25)
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'+' shift 24
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'-' shift 25
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'*' shift 26
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'/' shift 27
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'\n' shift 56
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. error
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state 34
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dexp : '(' dexp ')' . (15)
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. reduce 15
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state 35
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vexp : '(' dexp ',' . dexp ')' (17)
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DREG shift 13
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CONST shift 4
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'-' shift 29
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'(' shift 30
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. error
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dexp goto 57
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state 36
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vexp : '(' vexp ')' . (28)
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. reduce 28
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37: reduce/reduce conflict (reduce 10, reduce 16) on '+'
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37: reduce/reduce conflict (reduce 10, reduce 16) on '-'
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37: shift/reduce conflict (shift 21, reduce 16) on '*'
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37: shift/reduce conflict (shift 22, reduce 16) on '/'
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37: reduce/reduce conflict (reduce 10, reduce 16) on '\n'
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37: reduce/reduce conflict (reduce 10, reduce 16) on ')'
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state 37
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dexp : dexp . '+' dexp (10)
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dexp : dexp '+' dexp . (10)
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dexp : dexp . '-' dexp (11)
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dexp : dexp . '*' dexp (12)
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dexp : dexp . '/' dexp (13)
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vexp : dexp . (16)
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vexp : dexp . '+' vexp (20)
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vexp : dexp . '-' vexp (22)
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vexp : dexp . '*' vexp (24)
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vexp : dexp . '/' vexp (26)
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'*' shift 21
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'/' shift 22
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'+' reduce 10
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'-' reduce 10
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'\n' reduce 10
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')' reduce 10
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',' reduce 10
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state 38
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vexp : vexp . '+' vexp (19)
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vexp : dexp '+' vexp . (20)
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vexp : vexp . '-' vexp (21)
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vexp : vexp . '*' vexp (23)
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vexp : vexp . '/' vexp (25)
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'*' shift 26
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'/' shift 27
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'+' reduce 20
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'-' reduce 20
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'\n' reduce 20
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')' reduce 20
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39: reduce/reduce conflict (reduce 11, reduce 16) on '+'
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39: reduce/reduce conflict (reduce 11, reduce 16) on '-'
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39: shift/reduce conflict (shift 21, reduce 16) on '*'
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39: shift/reduce conflict (shift 22, reduce 16) on '/'
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39: reduce/reduce conflict (reduce 11, reduce 16) on '\n'
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39: reduce/reduce conflict (reduce 11, reduce 16) on ')'
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state 39
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dexp : dexp . '+' dexp (10)
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dexp : dexp . '-' dexp (11)
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dexp : dexp '-' dexp . (11)
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dexp : dexp . '*' dexp (12)
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dexp : dexp . '/' dexp (13)
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vexp : dexp . (16)
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vexp : dexp . '+' vexp (20)
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vexp : dexp . '-' vexp (22)
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vexp : dexp . '*' vexp (24)
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vexp : dexp . '/' vexp (26)
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'*' shift 21
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'/' shift 22
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'+' reduce 11
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'-' reduce 11
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'\n' reduce 11
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')' reduce 11
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',' reduce 11
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state 40
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vexp : vexp . '+' vexp (19)
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vexp : vexp . '-' vexp (21)
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vexp : dexp '-' vexp . (22)
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vexp : vexp . '*' vexp (23)
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vexp : vexp . '/' vexp (25)
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'*' shift 26
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'/' shift 27
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'+' reduce 22
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'-' reduce 22
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'\n' reduce 22
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')' reduce 22
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41: reduce/reduce conflict (reduce 12, reduce 16) on '+'
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41: reduce/reduce conflict (reduce 12, reduce 16) on '-'
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41: reduce/reduce conflict (reduce 12, reduce 16) on '*'
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41: reduce/reduce conflict (reduce 12, reduce 16) on '/'
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41: reduce/reduce conflict (reduce 12, reduce 16) on '\n'
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41: reduce/reduce conflict (reduce 12, reduce 16) on ')'
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state 41
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dexp : dexp . '+' dexp (10)
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dexp : dexp . '-' dexp (11)
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dexp : dexp . '*' dexp (12)
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dexp : dexp '*' dexp . (12)
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dexp : dexp . '/' dexp (13)
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vexp : dexp . (16)
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vexp : dexp . '+' vexp (20)
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vexp : dexp . '-' vexp (22)
|
||
vexp : dexp . '*' vexp (24)
|
||
vexp : dexp . '/' vexp (26)
|
||
|
||
. reduce 12
|
||
|
||
|
||
state 42
|
||
vexp : vexp . '+' vexp (19)
|
||
vexp : vexp . '-' vexp (21)
|
||
vexp : vexp . '*' vexp (23)
|
||
vexp : dexp '*' vexp . (24)
|
||
vexp : vexp . '/' vexp (25)
|
||
|
||
. reduce 24
|
||
|
||
|
||
43: reduce/reduce conflict (reduce 13, reduce 16) on '+'
|
||
43: reduce/reduce conflict (reduce 13, reduce 16) on '-'
|
||
43: reduce/reduce conflict (reduce 13, reduce 16) on '*'
|
||
43: reduce/reduce conflict (reduce 13, reduce 16) on '/'
|
||
43: reduce/reduce conflict (reduce 13, reduce 16) on '\n'
|
||
43: reduce/reduce conflict (reduce 13, reduce 16) on ')'
|
||
state 43
|
||
dexp : dexp . '+' dexp (10)
|
||
dexp : dexp . '-' dexp (11)
|
||
dexp : dexp . '*' dexp (12)
|
||
dexp : dexp . '/' dexp (13)
|
||
dexp : dexp '/' dexp . (13)
|
||
vexp : dexp . (16)
|
||
vexp : dexp . '+' vexp (20)
|
||
vexp : dexp . '-' vexp (22)
|
||
vexp : dexp . '*' vexp (24)
|
||
vexp : dexp . '/' vexp (26)
|
||
|
||
. reduce 13
|
||
|
||
|
||
state 44
|
||
vexp : vexp . '+' vexp (19)
|
||
vexp : vexp . '-' vexp (21)
|
||
vexp : vexp . '*' vexp (23)
|
||
vexp : vexp . '/' vexp (25)
|
||
vexp : dexp '/' vexp . (26)
|
||
|
||
. reduce 26
|
||
|
||
|
||
state 45
|
||
vexp : vexp . '+' vexp (19)
|
||
vexp : vexp '+' vexp . (19)
|
||
vexp : vexp . '-' vexp (21)
|
||
vexp : vexp . '*' vexp (23)
|
||
vexp : vexp . '/' vexp (25)
|
||
|
||
'*' shift 26
|
||
'/' shift 27
|
||
'+' reduce 19
|
||
'-' reduce 19
|
||
'\n' reduce 19
|
||
')' reduce 19
|
||
|
||
|
||
state 46
|
||
vexp : vexp . '+' vexp (19)
|
||
vexp : vexp . '-' vexp (21)
|
||
vexp : vexp '-' vexp . (21)
|
||
vexp : vexp . '*' vexp (23)
|
||
vexp : vexp . '/' vexp (25)
|
||
|
||
'*' shift 26
|
||
'/' shift 27
|
||
'+' reduce 21
|
||
'-' reduce 21
|
||
'\n' reduce 21
|
||
')' reduce 21
|
||
|
||
|
||
state 47
|
||
vexp : vexp . '+' vexp (19)
|
||
vexp : vexp . '-' vexp (21)
|
||
vexp : vexp . '*' vexp (23)
|
||
vexp : vexp '*' vexp . (23)
|
||
vexp : vexp . '/' vexp (25)
|
||
|
||
. reduce 23
|
||
|
||
|
||
state 48
|
||
vexp : vexp . '+' vexp (19)
|
||
vexp : vexp . '-' vexp (21)
|
||
vexp : vexp . '*' vexp (23)
|
||
vexp : vexp . '/' vexp (25)
|
||
vexp : vexp '/' vexp . (25)
|
||
|
||
. reduce 25
|
||
|
||
|
||
state 49
|
||
dexp : dexp . '+' dexp (10)
|
||
dexp : dexp . '-' dexp (11)
|
||
dexp : dexp . '*' dexp (12)
|
||
dexp : dexp . '/' dexp (13)
|
||
dexp : '-' dexp . (14)
|
||
|
||
. reduce 14
|
||
|
||
|
||
state 50
|
||
dexp : dexp . '+' dexp (10)
|
||
dexp : dexp . '-' dexp (11)
|
||
dexp : dexp . '*' dexp (12)
|
||
dexp : dexp . '/' dexp (13)
|
||
dexp : '(' dexp . ')' (15)
|
||
|
||
'+' shift 51
|
||
'-' shift 52
|
||
'*' shift 53
|
||
'/' shift 54
|
||
')' shift 34
|
||
. error
|
||
|
||
|
||
state 51
|
||
dexp : dexp '+' . dexp (10)
|
||
|
||
DREG shift 13
|
||
CONST shift 4
|
||
'-' shift 29
|
||
'(' shift 30
|
||
. error
|
||
|
||
dexp goto 58
|
||
|
||
|
||
state 52
|
||
dexp : dexp '-' . dexp (11)
|
||
|
||
DREG shift 13
|
||
CONST shift 4
|
||
'-' shift 29
|
||
'(' shift 30
|
||
. error
|
||
|
||
dexp goto 59
|
||
|
||
|
||
state 53
|
||
dexp : dexp '*' . dexp (12)
|
||
|
||
DREG shift 13
|
||
CONST shift 4
|
||
'-' shift 29
|
||
'(' shift 30
|
||
. error
|
||
|
||
dexp goto 60
|
||
|
||
|
||
state 54
|
||
dexp : dexp '/' . dexp (13)
|
||
|
||
DREG shift 13
|
||
CONST shift 4
|
||
'-' shift 29
|
||
'(' shift 30
|
||
. error
|
||
|
||
dexp goto 61
|
||
|
||
|
||
state 55
|
||
line : DREG '=' dexp '\n' . (5)
|
||
|
||
. reduce 5
|
||
|
||
|
||
state 56
|
||
line : VREG '=' vexp '\n' . (6)
|
||
|
||
. reduce 6
|
||
|
||
|
||
state 57
|
||
dexp : dexp . '+' dexp (10)
|
||
dexp : dexp . '-' dexp (11)
|
||
dexp : dexp . '*' dexp (12)
|
||
dexp : dexp . '/' dexp (13)
|
||
vexp : '(' dexp ',' dexp . ')' (17)
|
||
|
||
'+' shift 51
|
||
'-' shift 52
|
||
'*' shift 53
|
||
'/' shift 54
|
||
')' shift 62
|
||
. error
|
||
|
||
|
||
state 58
|
||
dexp : dexp . '+' dexp (10)
|
||
dexp : dexp '+' dexp . (10)
|
||
dexp : dexp . '-' dexp (11)
|
||
dexp : dexp . '*' dexp (12)
|
||
dexp : dexp . '/' dexp (13)
|
||
|
||
'*' shift 53
|
||
'/' shift 54
|
||
'+' reduce 10
|
||
'-' reduce 10
|
||
'\n' reduce 10
|
||
')' reduce 10
|
||
|
||
|
||
state 59
|
||
dexp : dexp . '+' dexp (10)
|
||
dexp : dexp . '-' dexp (11)
|
||
dexp : dexp '-' dexp . (11)
|
||
dexp : dexp . '*' dexp (12)
|
||
dexp : dexp . '/' dexp (13)
|
||
|
||
'*' shift 53
|
||
'/' shift 54
|
||
'+' reduce 11
|
||
'-' reduce 11
|
||
'\n' reduce 11
|
||
')' reduce 11
|
||
|
||
|
||
state 60
|
||
dexp : dexp . '+' dexp (10)
|
||
dexp : dexp . '-' dexp (11)
|
||
dexp : dexp . '*' dexp (12)
|
||
dexp : dexp '*' dexp . (12)
|
||
dexp : dexp . '/' dexp (13)
|
||
|
||
. reduce 12
|
||
|
||
|
||
state 61
|
||
dexp : dexp . '+' dexp (10)
|
||
dexp : dexp . '-' dexp (11)
|
||
dexp : dexp . '*' dexp (12)
|
||
dexp : dexp . '/' dexp (13)
|
||
dexp : dexp '/' dexp . (13)
|
||
|
||
. reduce 13
|
||
|
||
|
||
state 62
|
||
vexp : '(' dexp ',' dexp ')' . (17)
|
||
|
||
. reduce 17
|
||
|
||
|
||
Rules never reduced:
|
||
lines : (1)
|
||
lines : lines line (2)
|
||
|
||
|
||
State 8 contains 5 shift/reduce conflicts.
|
||
State 15 contains 6 reduce/reduce conflicts.
|
||
State 17 contains 5 shift/reduce conflicts.
|
||
State 32 contains 4 shift/reduce conflicts.
|
||
State 37 contains 2 shift/reduce conflicts, 4 reduce/reduce conflicts.
|
||
State 39 contains 2 shift/reduce conflicts, 4 reduce/reduce conflicts.
|
||
State 41 contains 6 reduce/reduce conflicts.
|
||
State 43 contains 6 reduce/reduce conflicts.
|
||
|
||
|
||
15 terminals, 5 nonterminals
|
||
29 grammar rules, 63 states
|