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- /*=============================================================================
- 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)
- =============================================================================*/
- #if !defined(BOOST_SPIRIT_CONJURE_COMPILER_HPP)
- #define BOOST_SPIRIT_CONJURE_COMPILER_HPP
- #include "ast.hpp"
- #include "error_handler.hpp"
- #include <vector>
- #include <map>
- #include <boost/function.hpp>
- #include <boost/shared_ptr.hpp>
- #include <boost/spirit/include/phoenix_core.hpp>
- #include <boost/spirit/include/phoenix_function.hpp>
- #include <boost/spirit/include/phoenix_operator.hpp>
- namespace client { namespace code_gen
- {
- ///////////////////////////////////////////////////////////////////////////
- // The Function
- ///////////////////////////////////////////////////////////////////////////
- struct function
- {
- function(std::vector<int>& code, int nargs)
- : code(code), address(code.size()), size_(0), nargs_(nargs) {}
- void op(int a);
- void op(int a, int b);
- void op(int a, int b, int c);
- int& operator[](std::size_t i) { return code[address+i]; }
- int const& operator[](std::size_t i) const { return code[address+i]; }
- std::size_t size() const { return size_; }
- std::size_t get_address() const { return address; }
- int nargs() const { return nargs_; }
- int nvars() const { return variables.size(); }
- int const* find_var(std::string const& name) const;
- void add_var(std::string const& name);
- void link_to(std::string const& name, std::size_t address);
- void print_assembler() const;
- private:
- std::map<std::string, int> variables;
- std::map<std::size_t, std::string> function_calls;
- std::vector<int>& code;
- std::size_t address;
- std::size_t size_;
- std::size_t nargs_;
- };
- ///////////////////////////////////////////////////////////////////////////
- // The Compiler
- ///////////////////////////////////////////////////////////////////////////
- struct compiler
- {
- typedef bool result_type;
- template <typename ErrorHandler>
- compiler(ErrorHandler& error_handler_)
- : current(0)
- {
- using namespace boost::phoenix::arg_names;
- namespace phx = boost::phoenix;
- using boost::phoenix::function;
- error_handler = function<ErrorHandler>(error_handler_)(
- "Error! ", _2, phx::cref(error_handler_.iters)[_1]);
- }
- bool operator()(ast::nil) { BOOST_ASSERT(0); return false; }
- bool operator()(unsigned int x);
- bool operator()(bool x);
- bool operator()(ast::identifier const& x);
- bool operator()(token_ids::type const& x);
- bool operator()(ast::unary const& x);
- bool operator()(ast::function_call const& x);
- bool operator()(ast::expression const& x);
- bool operator()(ast::assignment const& x);
- bool operator()(ast::variable_declaration const& x);
- bool operator()(ast::statement_list const& x);
- bool operator()(ast::statement const& x);
- bool operator()(ast::if_statement const& x);
- bool operator()(ast::while_statement const& x);
- bool operator()(ast::return_statement const& x);
- bool operator()(ast::function const& x);
- bool operator()(ast::function_list const& x);
- void print_assembler() const;
- boost::shared_ptr<code_gen::function>
- find_function(std::string const& name) const;
- std::vector<int>& get_code() { return code; }
- std::vector<int> const& get_code() const { return code; }
- private:
- bool compile_expression(
- int min_precedence,
- std::list<ast::operation>::const_iterator& rbegin,
- std::list<ast::operation>::const_iterator rend);
- typedef std::map<std::string, boost::shared_ptr<code_gen::function> > function_table;
- std::vector<int> code;
- code_gen::function* current;
- std::string current_function_name;
- function_table functions;
- bool void_return;
- boost::function<
- void(int tag, std::string const& what)>
- error_handler;
- };
- }}
- #endif
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