Delete abstract_syntax_tree.h
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#ifndef __ABSTRACT_SYNTAX_TREE_H__
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#define __ABSTRACT_SYNTAX_TREE_H__
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class ast_tree_node
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{
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protected:
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int line;
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int type;
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std::list<ast_tree_node> children;// for node that can be extended
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double num; // for number
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std::string str; // for string
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public:
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ast_tree_node()
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{
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line=0;
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type=__root;
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children.clear();
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num=0;
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str="";
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}
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void set_line(int _line)
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{
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line=_line;
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return;
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}
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int return_type()
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{
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return type;
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}
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int return_line()
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{
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return line;
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}
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double run()
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{
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if(type==__number)
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return num;
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else if(type==__root)
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{
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std::cout<<">>[Result(s)]"<<std::endl;
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for(std::list<ast_tree_node>::iterator i=children.begin();i!=children.end();++i)
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std::cout<<i->run()<<std::endl;
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return 1;
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}
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else
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{
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std::list<ast_tree_node>::iterator i=children.begin();
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double left_child=i->run();
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++i;
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double right_child=i->run();
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switch(type)
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{
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case __add_operator:return left_child+right_child;break;
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case __sub_operator:return left_child-right_child;break;
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case __mul_operator:return left_child*right_child;break;
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case __div_operator:return left_child/right_child;break;
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}
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}
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return 0;
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}
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void add_child(ast_tree_node& new_child)
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{
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children.push_back(new_child);
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return;
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}
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ast_tree_node& return_last_child()
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{
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std::list<ast_tree_node>::iterator i;
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for(i=children.begin();i!=children.end();++i)
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;
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--i;
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return *i;
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}
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void clear_tree()
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{
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line=0;
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type=__root;
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children.clear();
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num=0;
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str="";
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return;
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}
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int child_num()
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{
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int cnt=0;
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for(std::list<ast_tree_node>::iterator i=children.begin();i!=children.end();++i)
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++cnt;
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return cnt;
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}
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void print(int tab_num)
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{
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for(int i=0;i<tab_num;++i)
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std::cout<<" ";
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if(type==__number)
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{
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std::cout<<"[ number:";
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std::cout<<num;
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std::cout<<" ]"<<std::endl;
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return;
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}
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else if(type==__string)
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{
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std::cout<<"[ string:"<<str<<" ]"<<std::endl;
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return;
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}
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std::cout<<"{ [ node type:";
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print_token(type);
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std::cout<<" ]"<<std::endl;
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for(std::list<ast_tree_node>::iterator i=children.begin();i!=children.end();++i)
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i->print(tab_num+1);
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for(int i=0;i<tab_num;++i)
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std::cout<<" ";
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std::cout<<"}"<<std::endl;
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return;
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}
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};
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class operator_expr:public ast_tree_node
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{
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public:
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operator_expr():ast_tree_node()
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{
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type=__operator;
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}
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void set_operator_type(int oprt_type)
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{
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type=oprt_type;
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return;
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}
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};
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class number_expr:public ast_tree_node
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{
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public:
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number_expr():ast_tree_node()
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{
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type=__number;
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}
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double return_num()
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{
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return num;
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}
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void set_number(std::string& str)
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{
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type=__number;
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double is_float=false;
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int DotPlace=0;
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for(int i=0;i<(int)str.length();++i)
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if(str[i]=='.')
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{
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is_float=true;
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DotPlace=i;
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break;
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}
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if(!is_float)
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{
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num=0;
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double acc=1;
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for(int i=(int)str.length()-1;i>=0;--i)
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{
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num+=acc*((double)(str[i]-'0'));
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acc*=10;
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}
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}
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else
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{
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num=0;
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double acc=1;
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double aff=0.1;
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for(int i=DotPlace+1;i<(int)str.length();++i)
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{
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num+=aff*((double)(str[i]-'0'));
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aff*=0.1;
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}
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for(int i=DotPlace-1;i>=0;--i)
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{
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num+=acc*((double)(str[i]-'0'));
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acc*=10;
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}
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}
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return;
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}
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};
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class string_expr:public ast_tree_node
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{
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public:
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string_expr():ast_tree_node()
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{
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type=__string;
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}
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void set_str(std::string& t)
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{
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str=t;
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return;
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}
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std::string& return_str()
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{
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return str;
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}
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};
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#endif
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