forked from xxq250/Nasal-Interpreter
149 lines
3.5 KiB
C++
149 lines
3.5 KiB
C++
#include "nasal.h"
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nasal_resource resource;
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nasal_lexer lexer;
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nasal_parse parse;
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std::string command;
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void help()
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{
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std::cout<<">> [\'file\'] input a file."<<std::endl;
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std::cout<<">> [cls ] clear the screen."<<std::endl;
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std::cout<<">> [del ] clear the resource code."<<std::endl;
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std::cout<<">> [lib ] add lib file."<<std::endl;
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std::cout<<">> [rs ] print resource code."<<std::endl;
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std::cout<<">> [lex ] turn code into tokens."<<std::endl;
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std::cout<<">> [par ] turn tokens into abstract syntax tree."<<std::endl;
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std::cout<<">> [ast ] check the abstract syntax tree."<<std::endl;
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std::cout<<">> [run ] run code."<<std::endl;
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std::cout<<">> [logo ] print logo of nasal ."<<std::endl;
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std::cout<<">> [exit ] quit nasal interpreter."<<std::endl;
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return;
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}
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void logo()
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{
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std::cout<<" __ _ "<<std::endl;
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std::cout<<" /\\ \\ \\__ _ ___ __ _| | "<<std::endl;
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std::cout<<" / \\/ / _` / __|/ _` | | "<<std::endl;
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std::cout<<" / /\\ / (_| \\__ \\ (_| | | "<<std::endl;
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std::cout<<" \\_\\ \\/ \\__,_|___/\\__,_|_|"<<std::endl;
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return;
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}
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void del_func()
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{
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resource.clear();
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lexer.clear();
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parse.clear();
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std::cout<<">> [Delete] complete."<<std::endl;
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return;
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}
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void lex_func()
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{
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lexer.scanner(resource.get_file());
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if(!lexer.get_error())
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lexer.print_token();
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else
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std::cout<<">> [lexer] error(s) occurred,stop.\n";
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return;
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}
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void par_func()
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{
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lexer.scanner(resource.get_file());
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if(!lexer.get_error())
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{
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parse.set_toklist(lexer.get_token_list());
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parse.main_process();
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if(parse.get_error())
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std::cout<<">> [parse] error(s) occurred,stop.\n";
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}
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else
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std::cout<<">> [lexer] error(s) occurred,stop.\n";
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return;
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}
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void ast_func()
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{
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lexer.scanner(resource.get_file());
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if(!lexer.get_error())
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{
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parse.set_toklist(lexer.get_token_list());
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parse.main_process();
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if(parse.get_error())
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std::cout<<">> [parse] error(s) occurred,stop.\n";
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else
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parse.get_root().print_ast(0);
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}
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else
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std::cout<<">> [lexer] error(s) occurred,stop.\n";
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return;
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}
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int main()
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{
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#ifdef _WIN32
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// use chcp 65001 to use unicode io
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system("chcp 65001");
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system("cls");
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#endif
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// this curve looks really cool
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logo();
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#ifdef _WIN32
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std::cout<<">> [system] Windows system."<<std::endl;
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#endif
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#ifdef _linux_
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std::cout<<">> [system] Linux system."<<std::endl;
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#endif
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#ifdef TARGET_OS_MAC
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std::cout<<">> [system] MacOS system."<<std::endl;
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#endif
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std::cout<<">> Nasal interpreter ver 3.0 ."<<std::endl;
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std::cout<<">> Code: https://github.com/ValKmjolnir/Nasal-Interpreter"<<std::endl;
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std::cout<<">> More info: http://wiki.flightgear.org/Nasal_scripting_language"<<std::endl;
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std::cout<<">> Input \"help\" to get help ."<<std::endl;
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while(1)
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{
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std::cout<<">> ";
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std::cin>>command;
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if(command=="help")
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help();
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else if(command=="cls")
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{
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#ifdef _WIN32
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system("cls");
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#endif
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#ifdef _linux_
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system("clear");
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#endif
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#ifdef TARGET_OS_MAC
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system("clear");
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#endif
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}
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else if(command=="del")
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del_func();
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else if(command=="lib")
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resource.load_lib();
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else if(command=="rs")
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resource.print_file();
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else if(command=="lex")
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lex_func();
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else if(command=="par")
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par_func();
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else if(command=="ast")
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ast_func();
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else if(command=="run")
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{
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;
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}
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else if(command=="logo")
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logo();
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else if(command=="exit")
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break;
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else
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resource.input_file(command);
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}
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return 0;
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} |