1 /*============================================================================= 2 Copyright (c) 2001-2011 Joel de Guzman 3 4 Distributed under the Boost Software License, Version 1.0. (See accompanying 5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6 =============================================================================*/ 7 #if !defined(BOOST_SPIRIT_CALC8_COMPILER_HPP) 8 #define BOOST_SPIRIT_CALC8_COMPILER_HPP 9 10 #include "ast.hpp" 11 #include "error_handler.hpp" 12 #include <vector> 13 #include <map> 14 #include <boost/function.hpp> 15 #include <boost/spirit/include/phoenix_core.hpp> 16 #include <boost/spirit/include/phoenix_function.hpp> 17 #include <boost/spirit/include/phoenix_operator.hpp> 18 19 namespace client { namespace code_gen 20 { 21 /////////////////////////////////////////////////////////////////////////// 22 // The Program 23 /////////////////////////////////////////////////////////////////////////// 24 struct program 25 { 26 void op(int a); 27 void op(int a, int b); 28 void op(int a, int b, int c); 29 operator []client::code_gen::program30 int& operator[](std::size_t i) { return code[i]; } operator []client::code_gen::program31 int const& operator[](std::size_t i) const { return code[i]; } clearclient::code_gen::program32 void clear() { code.clear(); variables.clear(); } sizeclient::code_gen::program33 std::size_t size() const { return code.size(); } operator ()client::code_gen::program34 std::vector<int> const& operator()() const { return code; } 35 nvarsclient::code_gen::program36 int nvars() const { return variables.size(); } 37 int const* find_var(std::string const& name) const; 38 void add_var(std::string const& name); 39 40 void print_variables(std::vector<int> const& stack) const; 41 void print_assembler() const; 42 43 private: 44 45 std::map<std::string, int> variables; 46 std::vector<int> code; 47 }; 48 49 /////////////////////////////////////////////////////////////////////////// 50 // The Compiler 51 /////////////////////////////////////////////////////////////////////////// 52 struct compiler 53 { 54 typedef bool result_type; 55 56 template <typename ErrorHandler> compilerclient::code_gen::compiler57 compiler(client::code_gen::program& program, ErrorHandler& error_handler_) 58 : program(program) 59 { 60 using namespace boost::phoenix::arg_names; 61 namespace phx = boost::phoenix; 62 using boost::phoenix::function; 63 64 error_handler = function<ErrorHandler>(error_handler_)( 65 "Error! ", _2, phx::cref(error_handler_.iters)[_1]); 66 } 67 operator ()client::code_gen::compiler68 bool operator()(ast::nil) const { BOOST_ASSERT(0); return false; } 69 bool operator()(unsigned int x) const; 70 bool operator()(bool x) const; 71 bool operator()(ast::variable const& x) const; 72 bool operator()(ast::operation const& x) const; 73 bool operator()(ast::unary const& x) const; 74 bool operator()(ast::expression const& x) const; 75 bool operator()(ast::assignment const& x) const; 76 bool operator()(ast::variable_declaration const& x) const; 77 bool operator()(ast::statement_list const& x) const; 78 bool operator()(ast::statement const& x) const; 79 bool operator()(ast::if_statement const& x) const; 80 bool operator()(ast::while_statement const& x) const; 81 82 bool start(ast::statement_list const& x) const; 83 84 client::code_gen::program& program; 85 86 boost::function< 87 void(int tag, std::string const& what)> 88 error_handler; 89 }; 90 }} 91 92 #endif 93