ceph/src/boost/libs/spirit/example/qi/compiler_tutorial/calc7/compiler.hpp

   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_CALC7_COMPILER_HPP)
   8 #define BOOST_SPIRIT_CALC7_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
  30         int& operator[](std::size_t i) { return code[i]; }
  31         int const& operator[](std::size_t i) const { return code[i]; }
  32         void clear() { code.clear(); variables.clear(); }
  33         std::vector<int> const& operator()() const { return code; }
  34
  35         int nvars() const { return variables.size(); }
  36         int const* find_var(std::string const& name) const;
  37         void add_var(std::string const& name);
  38
  39         void print_variables(std::vector<int> const& stack) const;
  40         void print_assembler() const;
  41
  42     private:
  43
  44         std::map<std::string, int> variables;
  45         std::vector<int> code;
  46     };
  47
  48     ///////////////////////////////////////////////////////////////////////////
  49     //  The Compiler
  50     ///////////////////////////////////////////////////////////////////////////
  51     struct compiler
  52     {
  53         typedef bool result_type;
  54
  55         template <typename ErrorHandler>
  56         compiler(client::code_gen::program& program, ErrorHandler& error_handler_)
  57           : program(program)
  58         {
  59             using namespace boost::phoenix::arg_names;
  60             namespace phx = boost::phoenix;
  61             using boost::phoenix::function;
  62
  63             error_handler = function<ErrorHandler>(error_handler_)(
  64                 "Error! ", _2, phx::cref(error_handler_.iters)[_1]);
  65         }
  66
  67         bool operator()(ast::nil) const { BOOST_ASSERT(0); return false; }
  68         bool operator()(unsigned int x) const;
  69         bool operator()(ast::variable const& x) const;
  70         bool operator()(ast::operation const& x) const;
  71         bool operator()(ast::signed_ const& x) const;
  72         bool operator()(ast::expression const& x) const;
  73         bool operator()(ast::assignment const& x) const;
  74         bool operator()(ast::variable_declaration const& x) const;
  75         bool operator()(ast::statement_list const& x) const;
  76
  77         client::code_gen::program& program;
  78
  79         boost::function<
  80             void(int tag, std::string const& what)>
  81         error_handler;
  82     };
  83 }}
  84
  85 #endif