parse.cc

2007年机器人足球世界杯3D仿真组亚军

#include "parser.ih"

rPredicate Parser::parse(std::string const &_msg)
{
  Token tok;
  rPredicate pred = new Predicate(Predicate::type_list);

  tok.type = Token::none;

  // Initialize the lexer.
  initLex(_msg);

  while (true) {

    // lex the next token.
    tok = lex();

    // LPARENT | END_OF_LINE
    if (tok.type == Token::lparent) {
      lexPushBack(tok);
      pred->push(parsePred());
    } else if (tok.type == Token::end_of_line) {
      break;
    } else
      throw parser_error("parser error, expected '(' or END_OF_LINE");

  }

  return pred;
}