Java IExpressionNode.accept Examples

Example #1

File: Parser.java Project: AlexBroadbent/LazyLanguage

  private IExpressionNode assignmentOp(IExpressionNode variable) throws ParserException {
    if (lookahead.token == Token.EQUALS) {
      nextToken();
      IExpressionNode newVariable = expression();
      if (!(variable.getType() == IExpressionNode.VARIABLE_NODE))
        throw new ParserException(String.format(ERR_VARIABLE, variable.toString()));

      try {
        variable.accept(
            new SetVariable(((VariableExpressionNode) variable).getName(), newVariable.getValue()));
      } catch (EvaluationException ex) {
        throw new ParserException(
            String.format("The variable [%s] did not return a valid value", newVariable));
      }
    }

    return variable;
  }