93 lines
3.3 KiB
C++
93 lines
3.3 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 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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#if !defined(BOOST_SPIRIT_CALC8_COMPILER_HPP)
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#define BOOST_SPIRIT_CALC8_COMPILER_HPP
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#include "ast.hpp"
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#include "error_handler.hpp"
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#include <vector>
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#include <map>
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#include <boost/function.hpp>
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#include <boost/spirit/include/phoenix_core.hpp>
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#include <boost/spirit/include/phoenix_function.hpp>
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#include <boost/spirit/include/phoenix_operator.hpp>
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namespace client { namespace code_gen
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{
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///////////////////////////////////////////////////////////////////////////
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// The Program
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///////////////////////////////////////////////////////////////////////////
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struct program
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{
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void op(int a);
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void op(int a, int b);
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void op(int a, int b, int c);
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int& operator[](std::size_t i) { return code[i]; }
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int const& operator[](std::size_t i) const { return code[i]; }
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void clear() { code.clear(); variables.clear(); }
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std::size_t size() const { return code.size(); }
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std::vector<int> const& operator()() const { return code; }
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int nvars() const { return variables.size(); }
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int const* find_var(std::string const& name) const;
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void add_var(std::string const& name);
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void print_variables(std::vector<int> const& stack) const;
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void print_assembler() const;
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private:
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std::map<std::string, int> variables;
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std::vector<int> code;
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};
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///////////////////////////////////////////////////////////////////////////
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// The Compiler
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///////////////////////////////////////////////////////////////////////////
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struct compiler
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{
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typedef bool result_type;
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template <typename ErrorHandler>
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compiler(client::code_gen::program& program, ErrorHandler& error_handler_)
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: program(program)
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{
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using namespace boost::phoenix::arg_names;
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namespace phx = boost::phoenix;
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using boost::phoenix::function;
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error_handler = function<ErrorHandler>(error_handler_)(
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"Error! ", _2, phx::cref(error_handler_.iters)[_1]);
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}
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bool operator()(ast::nil) const { BOOST_ASSERT(0); return false; }
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bool operator()(unsigned int x) const;
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bool operator()(bool x) const;
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bool operator()(ast::variable const& x) const;
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bool operator()(ast::operation const& x) const;
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bool operator()(ast::unary const& x) const;
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bool operator()(ast::expression const& x) const;
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bool operator()(ast::assignment const& x) const;
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bool operator()(ast::variable_declaration const& x) const;
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bool operator()(ast::statement_list const& x) const;
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bool operator()(ast::statement const& x) const;
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bool operator()(ast::if_statement const& x) const;
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bool operator()(ast::while_statement const& x) const;
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bool start(ast::statement_list const& x) const;
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client::code_gen::program& program;
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boost::function<
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void(int tag, std::string const& what)>
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error_handler;
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};
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}}
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#endif
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