Re: Restart/Continue parser (maybe also lexer) at the previous state

[Hans Aberg]

On 10 Jan 2006, at 07:28, Roesner, Thomas wrote:

> I'd like to write a parser, that can be continued with a new input,  
> even
> if the previous input seemd to be EOF and the last found tokens  
> ended in
> a not finished "nonterminal"
>
> The background:
>
> We have a data structure with some formating information and a 80 char
> textfield.
> mystruct {int, int, int, char[80]}
>
> In some cases the complete data is stored in more than one  
> textline. I'd
> like to parse the first line and if the text is incomplete the next  
> line
> and so on.
>
> In the moment I copy all possible lines of text in a char[] and start
> the parser.
>
> In all my tests the scanner (flex) and the parser seemed to be reseted
> to an initial state, wichh leads to "incomplete Syntax".
>
> Any Ideas?

[Replies, cc Help-Bison.] This is normally handled by the lexer. For  
more help, you might try the Flex manual,
  address@hidden
  http://lists.gnu.org/mailman/listinfo/help-flex
or perhaps the Usenet newsgroup comp.compilers.

  Hans Aberg