655 lines
20 KiB
Python
655 lines
20 KiB
Python
class Sign:
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"""
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符号
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"""
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def __init__(self, sign_type, sign_str='', sign_line=-1):
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"""
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构造
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:param sign_type: 符号的类型
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:param sign_str: 符号的内容(可以为空)
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:param sign_line: 符号所在行数(可以为空)
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"""
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self.type = sign_type
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self.str = sign_str
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self.line = sign_line
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def is_terminal_sign(self):
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"""
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是不是终结符
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:return: True/False
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"""
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if self.type == 'empty':
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return True
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else:
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for i in terminal_sign_type:
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if i == self.type:
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return True
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return False
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def is_non_terminal_sign(self):
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"""
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是不是非终结符
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:return: True/False
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"""
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for i in non_terminal_sign_type:
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if i == self.type:
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return True
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return False
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def is_empty_sign(self):
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"""
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是不是空字
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:return: True/False
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"""
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return self.type == 'empty'
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class Production:
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"""
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产生式
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"""
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def __init__(self, left_type, right_types, semantic_start, semantic_children, semantic_end):
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"""
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产生式左边
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:param left_type: 产生式左边的符号类型
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:param right_types: 产生式右边的符号类型列表
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:param semantic_start: 语义操作关键字 - 开始
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:param semantic_children: 语义操作关键字 - 孩子
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:param semantic_end: 语义操作关键字 - 结束
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"""
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self.left = Sign(left_type)
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self.right = list()
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for i in right_types:
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self.right.append(Sign(i))
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# 调试用的
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self.str = self.left.type + ' ->'
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for i in self.right:
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self.str += ' ' + i.type
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# 语义操作关键字
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self.semantic_start = semantic_start
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self.semantic_children = list()
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for c in semantic_children:
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self.semantic_children.append(c)
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self.semantic_end = semantic_end
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"""
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1. program -> define-list
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2. define-list -> define define-list
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| empty
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3. define -> type ID define-type
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4. define-type -> var-define-follow
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| fun-define-follow
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5. var-define-follow -> ;
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| [ NUM ] ;
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6. type -> int
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| void
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7. fun-define-follow -> ( params ) code-block
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8. params -> param-list
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| empty
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9. param-list -> param param-follow
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10. param-follow -> , param param-follow
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| empty
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11. param -> type ID array-subscript
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12. array-subscript -> [ ]
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| empty
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13. code-block -> { local-define-list code-list }
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14. local-define-list -> local-var-define local-define-list
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| empty
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15. local-var-define -> type ID var-define-follow
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16. code-list -> code code-list
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| empty
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17. code -> normal-statement
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| selection-statement
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| iteration-statement
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| return-statement
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18. normal-statement -> ;
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| ID normal-statement-follow
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19. normal-statement-follow -> var-follow = exp ;
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| call-follow ;
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20. call-follow -> ( call-params )
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21. call-params -> call-param-list
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| empty
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22. call-param-list -> exp call-param-follow
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23. call-param-follow -> , exp call-param-follow
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| empty
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24. selection-statement -> if ( exp ) { code-list } selection-follow
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25. selection-follow -> else { code-list }
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| empty
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26. iteration-statement -> while ( exp ) iteration-follow
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27. iteration-follow -> { code-list }
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| code
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28. return-statement -> return return-follow
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29. return-follow -> ;
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| exp ;
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30. var-follow -> [ exp ]
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| empty
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31. exp -> additive-expr exp-follow
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32. exp-follow -> rel-op additive-expr
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| empty
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33. rel-op -> <=
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| <
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| >
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| >=
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| ==
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| !=
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34. additive-expr -> term additive-expr-follow
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35. additive-expr-follow -> add-op term additive-expr-follow
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| empty
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36. add-op -> +
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| -
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37. term -> factor term-follow
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38. term-follow -> mul-op factor term-follow
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| empty
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39. mul-op -> *
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| /
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40. factor -> ( exp )
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| ID id-factor-follow | NUM
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41. id-factor-follow -> var-follow
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| ( args )
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42. args -> arg-list
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| empty
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43. arg-list -> exp arg-list-follow
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44. arg-list-follow -> , exp arg-list-follow
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| empty
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"""
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# 所有终结符的类型
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terminal_sign_type = [
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'fn',
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'else',
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'if',
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'int',
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'return',
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'void',
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'while',
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'addition',
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'subtraction',
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'multiplication',
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'division',
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'bigger',
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'bigger-equal',
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'smaller',
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'smaller-equal',
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'equal',
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'not-equal',
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'evaluate',
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'semicolon',
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'comma',
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'left-parentheses',
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'right-parentheses',
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'left-bracket',
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'right-bracket',
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'left-brace',
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'right-brace',
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'float-num',
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'int-num',
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'id',
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'colon',
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'right-arrow',
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'i32',
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'f32',
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# 在这之前添加非终结符类型，请务必不要动 'pound'
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'pound'
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]
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# 所有非终结符的类型
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non_terminal_sign_type = [
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'program',
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'define-lists',
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'define-list',
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'define',
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'define-type',
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'var-define-follow',
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'type',
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'fun-define',
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'fun-define-follow',
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'params',
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'param-list',
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'param-follow',
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'param',
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'arraylist',
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'code-block',
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'local-define-list',
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'local-var-define',
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'code-list',
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'code',
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'normal-statement',
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'normal-statement-follow',
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'call-follow',
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'call-params',
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'call-param-list',
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'call-param-follow',
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'selection-statement',
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'selection-follow',
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'iteration-statement',
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'iteration-follow',
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'return-statement',
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'return-follow',
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# 'eval-statement',
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# 'var',
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'var-follow',
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'exp',
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'exp-follow',
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'rel-op',
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'additive-expr',
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'additive-expr-follow',
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'add-op',
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'term',
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'term-follow',
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'mul-op',
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'factor',
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'id-factor-follow',
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'args',
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'arg-list',
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'arg-list-follow',
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'global-var-define',
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'fun-return',
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'paramlist',
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'arraylist',
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'global-var-define-follow',
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'local-define',
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'local-define-follow',
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'arraylist-with-num'
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]
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"""
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0. program -> define-lists
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1. define-lists -> define-list define-lists
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2. define-lists ->
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3. define-list -> fun-define
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4. define-list -> global-var-define
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5. fun-define -> fn id left-parentheses params right-parentheses fun-return left-brace code-block right-brace
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6. params ->
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7. params -> paramlist
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8. paramlist -> param param-follow
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9. param-follow -> comma param-follow
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10. param-follow ->
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11. param -> id colon type arraylist
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12. arraylist ->
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13. arraylist -> left-bracket right-bracket
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14. fun-return ->
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15. fun-return -> right-arrow type arraylist
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16. type -> i32
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17. type -> f32
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18. type -> void
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19. global-var-define -> type arraylist id global-var-define-follow
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20. global-var-define-follow -> comma id global-var-define-follow
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21. global-var-define-follow -> semicolon
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22. code-block -> code-list
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23. code-list -> code code-list
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24. code-list ->
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25. code -> local-define
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26. code -> normal-statement
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27. code -> selection-statement
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28. code -> iteration-statement
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29. code -> return-statement
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30. local-define -> type arraylist id local-define-follow
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31. local-define-follow -> comma id local-define-follow
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32. local-define-follow -> semicolon
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33. normal-statement -> semicolon
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34. normal-statement -> id normal-statement-follow
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35. normal-statement-follow -> var-follow equal exp semicolon
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36. normal-statement-follow -> call-follow semicolon
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37. var-follow ->
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38. var-follow -> left-bracket exp right-bracket
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39. call-follow -> left-parentheses call-params right-parentheses
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40. call-params -> call-param-list
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41. call-params ->
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42. call-param-list -> exp call-param-follow
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43. call-param-follow -> comma exp call-param-follow
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44. call-param-follow ->
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45. selection-statement -> if exp left-brace code-list right-brace selection-follow
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46. selection-follow -> else left-brace code-list right-brace
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47. selection-follow ->
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48. iteration-statement -> while exp left-brace code-list right-brace
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49. return-statement -> return return-follow
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50. return-follow -> semicolon
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51. return-follow -> exp semicolon
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52. exp -> additive-expr exp-follow
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53. exp-follow -> rel-op additive-expr
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54. exp-follow ->
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55. rel-op -> smaller-equal
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56. rel-op -> smaller
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57. rel-op -> bigger
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58. rel-op -> bigger-equal
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59. rel-op -> equal
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60. rel-op -> not-equal
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61. additive-expr -> term additive-expr-follow
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62. additive-expr-follow -> add-op term additive-expr-follow
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63. additive-expr-follow ->
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64. add-op -> addition
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65. add-op -> subtraction
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66. term -> factor term-follow
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67. term-follow -> mul-op factor term-follow
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68. term-follow ->
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69. mul-op -> multiplication
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70. mul-op -> division
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71. factor -> left-parentheses exp right-parentheses
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72. factor -> id id-factor-follow
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73. factor -> num
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74. id-factor-follow -> var-follow
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75. id-factor-follow -> left-parentheses args right-parentheses
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76. args -> arg-list
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77. args ->
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78. arg-list -> exp arg-list-follow
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79. arg-list-follow -> comma exp arg-list-follow
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80. arg-list-follow ->
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"""
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# 文法产生式
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productions = [
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# 0
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Production('program', ['define-lists'],
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'Program0S', [None], 'Program0E'),
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# 1
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Production('define-lists', ['define-list', 'define-lists'],
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None, [None, None], 'DefineLists1E'),
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# 2
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Production('define-lists', [],
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None, [], 'DefineLists2E'),
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# 3
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Production('define-list', ['fun-define'],
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None, [None], 'DefineList3E',
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),
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# 4
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Production('define-list', ['global-var-define'],
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None, [None], 'DefineList4E',
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),
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# 5
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Production('fun-define',
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['fn', 'id', 'left-parentheses', 'params', 'right-parentheses', 'fun-return', 'left-brace', 'code-block',
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'right-brace'],
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None, [None, None, None, 'FunDefine5C3', None, 'FunDefine5C5', None, None, 'FunDefine5C7'], 'FunDefine5E',
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),
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# 6
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Production('params', [],
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'Params6S', [], None,
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),
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# 7
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Production('params', ['paramlist'],
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'Params7S', ['Params7C0'], None,
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),
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# 8
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Production('paramlist', ['param', 'param-follow'],
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None, ['ParamList8C0', 'ParamList8C1'], None,
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),
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# 9
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Production('param-follow', ['comma', 'param', 'param-follow'],
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None, [None, 'ParamFollow9C1', 'ParamFollow9C2'], None,
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),
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# 10
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Production('param-follow', [],
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None, [], None,
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),
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# 11
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Production('param', ['id', 'colon', 'type', 'arraylist'],
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None, [None, None, None, None], 'Param11E',
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),
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# 12
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Production('arraylist', [],
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'ArrayList12S', [], None,
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),
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# 13
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Production('arraylist', ['left-bracket', 'right-bracket'],
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'ArrayList13S', [None, None], None,
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),
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# 14
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Production('fun-return', [],
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'FunReturn14S', [], None,
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),
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# 15
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Production('fun-return', ['right-arrow', 'type', 'arraylist'],
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None, [None, None, None], 'FunReturn15E',
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),
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# 16
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Production('type', ['i32'],
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'Type16S', [None], None,
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),
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# 17
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Production('type', ['f32'],
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'Type17S', [None], None,
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),
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# 18
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Production('type', ['void'],
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"Type18S", [None], None,
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),
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# 19
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Production('global-var-define', ['type', 'arraylist-with-num', 'id', 'global-var-define-follow'],
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None, [None, None, None, 'GlobalVarDefine19C3'], 'GlobalVarDefine19E',
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),
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# 20
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Production('global-var-define-follow', ['comma', 'id', 'global-var-define-follow'],
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None, [None, None, 'GlobalVarDefineFllow20C2'], 'GlobalVarDefineFllow20E',
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),
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# 21
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Production('global-var-define-follow', ['semicolon'],
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None, [None], None,
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),
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# 22
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Production('code-block', ['code-list'],
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None, ['CodeBlock22C0'], 'CodeBlock22E',
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),
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# 23
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Production('code-list', ['code', 'code-list'],
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None, ["CodeList23C0", 'CodeList23C1'], 'CodeList23E',
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),
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# 24
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Production('code-list', [],
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None, [], 'CodeList24E',
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),
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# 25
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Production('code', ['local-define'],
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None, ['Code25C0'], 'Code25E',
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),
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# 26
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Production('code', ['normal-statement'],
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None, ['Code26C0'], 'Code26E',
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),
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# 27
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Production('code', ['selection-statement'],
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None, ['Code27C0'], 'Code26E',
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),
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# 28
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Production('code', ['iteration-statement'],
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None, ['Code28C0'], 'Code25E',
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),
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# 29
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Production('code', ['return-statement'],
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None, ['Code29C0'], 'Code25E',
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),
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# # 30
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# Production('local-define', ['type', 'arraylist', 'id', 'local-define-follow'],
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# None, [None, None, None, None], None,
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# ),
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# # 31
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# Production('local-define-follow', ['comma', 'id', 'local-define-follow'],
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# None, [None, None, None], None,
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# ),
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# # 32
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# Production('local-define-follow', ['semicolon'],
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# None, [None], None,
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# ),
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# # 33
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# Production('normal-statement', ['semicolon'],
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# None, [None], None,
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# ),
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# # 34
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# Production('normal-statement', ['id', 'normal-statement-follow'],
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# None, [None, None], None,
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# ),
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# # 35
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# Production('normal-statement-follow', ['var-follow', 'equal', 'exp', 'semicolon'],
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# None, [None, None, None, None], None,
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# ),
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# # 36
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# Production('normal-statement-follow', ['call-follow', 'semicolon'],
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# None, [None], None,
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# ),
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# # 37
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# Production('var-follow', [],
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# None, [], None,
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# ),
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# # 38
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# Production('var-follow', ['left-bracket', 'exp', 'right-bracket'],
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# None, [None, None, None], None,
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# ),
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# # 39
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# Production('call-follow', ['left-parentheses', 'call-params', 'right-parentheses'],
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# None, [None, None, None], None,
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# ),
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# # 40
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# Production('call-params', ['call-param-list'],
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# None, [None], None,
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# ),
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# # 41
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# Production('call-params', [],
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# None, [], None,
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# ),
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# # 42
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# Production('call-param-list', ['exp', 'call-param-follow'],
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# None, [None, None], None,
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# ),
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# # 43
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# Production('call-param-follow', ['comma', 'exp', 'call-param-follow'],
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# None, [None, None, None], None,
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# ),
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# # 44
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# Production('call-param-follow', [],
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# None, [], None,
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# ),
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# # 45
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# Production('selection-statement', ['if', 'exp', 'left-brace', 'code-list', 'right-brace', 'selection-follow'],
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# None, [None, None, None, None, None, None], None,
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# ),
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# # 46
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# Production('selection-follow', ['else', 'left-brace', 'code-list', 'right-brace'],
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# None, [None, None, None, None], None,
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|
# ),
|
|
# # 47
|
|
# Production('selection-follow', [],
|
|
# None, [], None,
|
|
# ),
|
|
# # 48
|
|
# Production('iteration-statement', ['while', 'exp', 'left-brace', 'code-list', 'right-brace'],
|
|
# None, [None, None, None, None, None], None,
|
|
# ),
|
|
# # 49
|
|
# Production('return-statement', ['return', 'return-follow'],
|
|
# None, [None, None], None,
|
|
# ),
|
|
# # 50
|
|
# Production('return-follow', ['semicolon'],
|
|
# None, [None], None,
|
|
# ),
|
|
# # 51
|
|
# Production('return-follow', ['exp', 'semicolon'],
|
|
# None, [None, None], None,
|
|
# ),
|
|
# # 52
|
|
# Production('exp', ['additive-expr', 'exp-follow'],
|
|
# None, ['exp0C0', 'exp0C1'], 'exp0E'),
|
|
# # 53
|
|
# Production('exp-follow', ['rel-op', 'additive-expr'],
|
|
# None, [None, 'expFollow0C1'], 'expFollow0E'),
|
|
# # 54
|
|
# Production('exp-follow', [],
|
|
# None, [], 'expFollow1E'),
|
|
# # 55
|
|
# Production('rel-op', ['smaller-equal'],
|
|
# None, [None], 'RelOp0E'),
|
|
# # 56
|
|
# Production('rel-op', ['smaller'],
|
|
# None, [None], 'RelOp1E'),
|
|
# # 57
|
|
# Production('rel-op', ['bigger'],
|
|
# None, [None], 'RelOp2E'),
|
|
# # 58
|
|
# Production('rel-op', ['bigger-equal'],
|
|
# None, [None], 'RelOp3E'),
|
|
# # 59
|
|
# Production('rel-op', ['equal'],
|
|
# None, [None], 'RelOp4E'),
|
|
# # 60
|
|
# Production('rel-op', ['not-equal'],
|
|
# None, [None], 'RelOp5E'),
|
|
# # 61
|
|
# Production('additive-expr', ['term', 'additive-expr-follow'],
|
|
# None, ['AdditiveExpr0C0', 'AdditiveExpr0C1'], 'AdditiveExpr0E'),
|
|
# # 62
|
|
# Production('additive-expr-follow', ['add-op', 'term', 'additive-expr-follow'],
|
|
# None, [None, 'AdditiveExprFollow0C1', 'AdditiveExprFollow0C2'], 'AdditiveExprFollow0E'),
|
|
# # 63
|
|
# Production('additive-expr-follow', [],
|
|
# None, [], 'AdditiveExprFollow1E'),
|
|
# # 64
|
|
# Production('add-op', ['addition'],
|
|
# None, [None], 'AddOp0E'),
|
|
# # 65
|
|
# Production('add-op', ['subtraction'],
|
|
# None, [None], 'AddOp1E'),
|
|
# # 66
|
|
# Production('term', ['factor', 'term-follow'],
|
|
# None, ['Term0C0', 'Term0C1'], 'Term0E'),
|
|
# # 67
|
|
# Production('term-follow', ['mul-op', 'factor', 'term-follow'],
|
|
# None, [None, 'TermFollow0C1', 'TermFollow0C2'], 'TermFollow0E'),
|
|
# # 68
|
|
# Production('term-follow', [],
|
|
# None, [], None),
|
|
# # 69
|
|
# Production('mul-op', ['multiplication'],
|
|
# None, [None], 'MulOp0E'),
|
|
# # 70
|
|
# Production('mul-op', ['division'],
|
|
# None, [None], 'MulOp1E'),
|
|
# # 71
|
|
# Production('factor', ['left-parentheses', 'exp', 'right-parentheses'],
|
|
# None, [None, 'Factor0C1', None], 'Factor0E'),
|
|
# # 72
|
|
# Production('factor', ['id', 'id-factor-follow'],
|
|
# None, [None, 'Factor1C1'], 'Factor1E'),
|
|
# # 73
|
|
# Production('factor', ['num'],
|
|
# None, [None], 'Factor2E'),
|
|
# # 74
|
|
# Production('id-factor-follow', ['var-follow'],
|
|
# None, [None], 'IdFactorFollow0E'),
|
|
# # 75
|
|
# Production('id-factor-follow', ['left-parentheses', 'args', 'right-parentheses'],
|
|
# None, [None, 'IdFactorFollow1C1', None], 'IdFactorFollow1E'),
|
|
# # 76
|
|
# Production('args', ['arg-list'],
|
|
# None, ['Args0C0'], 'Args0E'),
|
|
# # 77
|
|
# Production('args', [],
|
|
# None, [], 'Args1E'),
|
|
# # 78
|
|
# Production('arg-list', ['exp', 'arg-list-follow'],
|
|
# None, ['ArgList0C0', 'ArgList0C1'], 'ArgList0E'),
|
|
# # 79
|
|
# Production('arg-list-follow', ['comma', 'exp', 'arg-list-follow'],
|
|
# None, [None, 'ArgListFollow0C1', 'ArgListFollow0C2'], 'ArgListFollow0E'),
|
|
# # 80
|
|
# Production('arg-list-follow', [],
|
|
# None, [], 'ArgListFollow1E'),
|
|
|
|
# 81
|
|
Production('arraylist-with-num', [],
|
|
None, [], 'ArrayListWithNum81E',
|
|
),
|
|
# 82
|
|
Production('arraylist-with-num', ['left-bracket', 'int-num', 'right-bracket'],
|
|
None, [None, None, None], 'ArrayListWithNum82E',
|
|
)
|
|
]
|
|
|
|
# 文法开始符号
|
|
grammar_start = Sign('program') |