mirror of
https://github.com/ValKmjolnir/Nasal-Interpreter.git
synced 2026-07-22 02:48:48 +08:00
Valk Richard Li
75 lines
2.6 KiB
C++
75 lines
2.6 KiB
C++
#ifndef __PDA_H__
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#define __PDA_H__
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#include <stack>
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struct parse_unit
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{
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int line;
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int type;
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};
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enum token_type
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{
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__stack_end,
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__equal,// =
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__cmp_equal,// ==
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__cmp_not_equal,// !=
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__cmp_less,__cmp_less_or_equal,// < <=
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__cmp_more,__cmp_more_or_equal,// > >=
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__and_operator,__or_operator,__nor_operator,// and or !
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__add_operator,__sub_operator,__mul_operator,__div_operator,__link_operator,// + - * / ~
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__add_equal,__sub_equal,__mul_equal,__div_equal,__link_equal,// += -= *= /= ~=
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__left_brace,__right_brace,// {}
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__left_bracket,__right_bracket,// []
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__left_curve,__right_curve,// ()
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__semi,// ;
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__comma,// ,
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__colon,// :
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__dot,// .
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__var,// var reserve word
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__func,// func reserve word
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__unknown_type_id,__identifier,__identifiers,
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__scalar,__scalars,__list,__hash,
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__hash_member,__hash_members,
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__statement,__statements,
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__function,//function(){}
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__definition,__assignment,__calculation,
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__loop,__continue,__break,__for,__forindex,__foreach,__while,// for()while() continue; break;
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__choose,__if,__elsif,__else,// if else if else
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__return
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};
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struct cmp_seq
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{
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int tokens[20];
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int res;
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}par[]=
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{
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{{__var,__identifier,__equal,__scalar,__semi}, __definition},
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{{__var,__identifier,__equal,__identifier,__semi}, __definition},
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{{__var,__identifier,__equal,__list,__semi}, __definition},
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{{__var,__identifier,__equal,__hash,__semi}, __definition},
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{{__var,__identifier,__equal,__function}, __definition},
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{{__var,__left_curve,__identifiers,__right_curve,__equal,__identifier,__semi},__definition},
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{{__var,__left_curve,__identifiers,__right_curve,__equal,__list,__semi}, __definition},
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{{__identifier,__dot,__identifier}, __identifier},
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{{__identifier,__left_bracket,__scalar,__right_bracket}, __identifier},
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{{__identifier,__left_bracket,__identifier,__right_bracket}, __identifier},
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{{__identifier,__left_bracket,__calculation,__right_bracket}, __identifier},
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{{__identifier,__left_curve,__right_curve}, __identifier},
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{{__identifier,__left_curve,__scalar,__right_curve}, __identifier}
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};
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int num_of_par=sizeof(par)/sizeof(cmp_seq);
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class pda
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{
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private:
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std::stack<parse_unit> main_stack;
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std::stack<parse_unit> cmp_stack;
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std::stack<parse_unit> recog_stack;
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public:
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};
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