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YACC??

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YACC YACC Yet Another Compiler Compiler YACC YACC YACC ... – PowerPoint PPT presentation

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Title: YACC??


1
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YACC??
  • YACCYet Another Compiler Compiler

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YACC??
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3
YACC????
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YACC????
  • Parser GeneratorProject-ParserWizard

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YACC????
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YACC????
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YACC????
?????????C????????? ???????????????????????
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YACC????
?? ?????1??2??n ????,?YACC??????? ????1????
1 ??2????2 ??n????n

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YACC????
E?ETT T?TFF F?(E)digit
10
LR????????
  • ??LR?????????????????(?)???????????

11
LR???????????
?? ACTION ACTION ACTION ACTION ACTION ACTION GOTO GOTO GOTO
?? i ( ) E T F
0 S5 S4 1 2 3
1 S6 acc
2 r2 S7 r2 r2
3 r4 r4 r4 r4
4 S5 S4 8 2 3
5 r6 r6 r6 r6
6 S5 S4 9 3
7 S5 S4 10
8 S6 S11
9 r1 r7 r1 r1
10 r3 r3 r3 r3
11 r5 r5 r5 r5
??G(1)E ? ET (2)E ? T(3)T ? TF (4)T ? F
(5)F ? (E) (6)F ? i
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YACC????
  • YACC??????-???????-?????????
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  • Thanks for your time!
  • Questions Answers
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