111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2014 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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///////////////////////////////////////////////////////////////////////////////
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//
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// Now we'll introduce boolean expressions and control structures.
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// Is it obvious now what we are up to? ;-)
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//
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// [ JDG April 9, 2007 ] spirit2
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// [ JDG February 18, 2011 ] Pure attributes. No semantic actions.
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// [ JDG June 6, 2014 ] Ported from qi calc8 example.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "ast.hpp"
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#include "vm.hpp"
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#include "compiler.hpp"
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#include "statement.hpp"
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#include "error_handler.hpp"
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#include "config.hpp"
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#include <iostream>
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///////////////////////////////////////////////////////////////////////////////
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// Main program
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///////////////////////////////////////////////////////////////////////////////
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int
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main()
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{
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std::cout << "/////////////////////////////////////////////////////////\n\n";
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std::cout << "Statement parser...\n\n";
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std::cout << "/////////////////////////////////////////////////////////\n\n";
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std::cout << "Type some statements... ";
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std::cout << "An empty line ends input, compiles, runs and prints results\n\n";
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std::cout << "Example:\n\n";
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std::cout << " var a = 123;\n";
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std::cout << " var b = 456;\n";
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std::cout << " var c = a + b * 2;\n\n";
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std::cout << "-------------------------\n";
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std::string str;
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std::string source;
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while (std::getline(std::cin, str))
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{
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if (str.empty())
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break;
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source += str + '\n';
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}
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using client::parser::iterator_type;
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iterator_type iter(source.begin());
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iterator_type end(source.end());
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client::vmachine vm; // Our virtual machine
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client::code_gen::program program; // Our VM program
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client::ast::statement_list ast; // Our AST
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using boost::spirit::x3::with;
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using client::parser::error_handler_type;
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error_handler_type error_handler(iter, end, std::cerr); // Our error handler
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// Our compiler
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client::code_gen::compiler compile(program, error_handler);
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// Our parser
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auto const parser =
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// we pass our error handler to the parser so we can access
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// it later on in our on_error and on_sucess handlers
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with<client::parser::error_handler_tag>(std::ref(error_handler))
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[
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client::statement()
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];
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using boost::spirit::x3::ascii::space;
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bool success = phrase_parse(iter, end, parser, space, ast);
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std::cout << "-------------------------\n";
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if (success && iter == end)
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{
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if (compile.start(ast))
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{
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std::cout << "Success\n";
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std::cout << "-------------------------\n";
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vm.execute(program());
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std::cout << "-------------------------\n";
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std::cout << "Assembler----------------\n\n";
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program.print_assembler();
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std::cout << "-------------------------\n";
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std::cout << "Results------------------\n\n";
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program.print_variables(vm.get_stack());
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}
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else
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{
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std::cout << "Compile failure\n";
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}
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}
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else
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{
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std::cout << "Parse failure\n";
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}
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std::cout << "-------------------------\n\n";
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return 0;
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}
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