127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2001-2011 Hartmut Kaiser
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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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#include "statement.hpp"
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#include "error_handler.hpp"
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#include "annotation.hpp"
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namespace client { namespace parser
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{
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template <typename Iterator, typename Lexer>
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statement<Iterator, Lexer>::statement(
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error_handler<typename Lexer::base_iterator_type, Iterator>& error_handler
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, Lexer const& l)
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: statement::base_type(statement_list), expr(error_handler, l)
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{
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qi::_1_type _1;
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qi::_2_type _2;
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qi::_3_type _3;
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qi::_4_type _4;
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qi::_val_type _val;
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qi::tokenid_mask_type tokenid_mask;
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using qi::on_error;
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using qi::on_success;
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using qi::fail;
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using boost::phoenix::function;
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typedef client::error_handler<typename Lexer::base_iterator_type, Iterator>
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error_handler_type;
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typedef function<error_handler_type> error_handler_function;
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typedef function<client::annotation<Iterator> > annotation_function;
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statement_list =
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+statement_
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;
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statement_ =
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variable_declaration
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| assignment
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| compound_statement
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| if_statement
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| while_statement
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| return_statement
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| expr
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| ';'
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;
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variable_declaration =
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l("int")
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> expr.identifier
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> -(l("=") > expr)
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> ';'
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;
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assignment =
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expr.identifier
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> tokenid_mask(token_ids::op_assign)
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> expr
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> ';'
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;
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if_statement =
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l("if")
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> '('
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> expr
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> ')'
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> statement_
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>
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-(
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l("else")
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> statement_
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)
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;
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while_statement =
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l("while")
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> '('
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> expr
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> ')'
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> statement_
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;
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compound_statement =
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'{' >> -statement_list >> '}'
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;
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return_statement =
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l("return")
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> -expr
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> ';'
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;
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// Debugging and error handling and reporting support.
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BOOST_SPIRIT_DEBUG_NODES(
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(statement_list)
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(statement_)
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(variable_declaration)
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(assignment)
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(if_statement)
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(while_statement)
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(compound_statement)
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(return_statement)
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);
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// Error handling: on error in statement_list, call error_handler.
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on_error<fail>(statement_list,
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error_handler_function(error_handler)(
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"Error! Expecting ", _4, _3));
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// Annotation: on success in variable_declaration,
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// assignment and return_statement, call annotation.
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on_success(variable_declaration,
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annotation_function(error_handler.iters)(_val, _1));
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on_success(assignment,
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annotation_function(error_handler.iters)(_val, _1));
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on_success(return_statement,
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annotation_function(error_handler.iters)(_val, _1));
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}
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}}
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