102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2001-2011 Joel de Guzman
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Now we'll introduce variables and assignment. This time, we'll also
|
|
// be renaming some of the rules -- a strategy for a grander scheme
|
|
// to come ;-)
|
|
//
|
|
// This version also shows off grammar modularization. Here you will
|
|
// see how expressions and statements are built as modular grammars.
|
|
//
|
|
// [ JDG April 9, 2007 ] spirit2
|
|
// [ JDG February 18, 2011 ] Pure attributes. No semantic actions.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "statement.hpp"
|
|
#include "vm.hpp"
|
|
#include "compiler.hpp"
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Main program
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
int
|
|
main()
|
|
{
|
|
std::cout << "/////////////////////////////////////////////////////////\n\n";
|
|
std::cout << "Statement parser...\n\n";
|
|
std::cout << "/////////////////////////////////////////////////////////\n\n";
|
|
std::cout << "Type some statements... ";
|
|
std::cout << "An empty line ends input, compiles, runs and prints results\n\n";
|
|
std::cout << "Example:\n\n";
|
|
std::cout << " var a = 123;\n";
|
|
std::cout << " var b = 456;\n";
|
|
std::cout << " var c = a + b * 2;\n\n";
|
|
std::cout << "-------------------------\n";
|
|
|
|
std::string str;
|
|
std::string source;
|
|
while (std::getline(std::cin, str))
|
|
{
|
|
if (str.empty())
|
|
break;
|
|
source += str + '\n';
|
|
}
|
|
|
|
typedef std::string::const_iterator iterator_type;
|
|
iterator_type iter = source.begin();
|
|
iterator_type end = source.end();
|
|
|
|
client::vmachine vm; // Our virtual machine
|
|
client::code_gen::program program; // Our VM program
|
|
client::ast::statement_list ast; // Our AST
|
|
|
|
client::error_handler<iterator_type>
|
|
error_handler(iter, end); // Our error handler
|
|
client::parser::statement<iterator_type>
|
|
parser(error_handler); // Our parser
|
|
client::code_gen::compiler
|
|
compile(program, error_handler); // Our compiler
|
|
|
|
boost::spirit::ascii::space_type space;
|
|
bool success = phrase_parse(iter, end, parser, space, ast);
|
|
|
|
std::cout << "-------------------------\n";
|
|
|
|
if (success && iter == end)
|
|
{
|
|
if (compile(ast))
|
|
{
|
|
std::cout << "Success\n";
|
|
std::cout << "-------------------------\n";
|
|
vm.execute(program());
|
|
|
|
std::cout << "-------------------------\n";
|
|
std::cout << "Assembler----------------\n\n";
|
|
program.print_assembler();
|
|
|
|
std::cout << "-------------------------\n";
|
|
std::cout << "Results------------------\n\n";
|
|
program.print_variables(vm.get_stack());
|
|
}
|
|
else
|
|
{
|
|
std::cout << "Compile failure\n";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
std::cout << "Parse failure\n";
|
|
}
|
|
|
|
std::cout << "-------------------------\n\n";
|
|
return 0;
|
|
}
|
|
|
|
|