Hi Peng,
> Le 8 févr. 2019 à 02:01, Peng Yu <pengyu...@gmail.com> a écrit :
>
> [...]
> For example, to deal with heredoc in bash, the grammar rule will change the
> variable `need_here_doc` via `push_heredoc()`.
>
> ```
> | LESS_LESS WORD
> {
> source.dest = 0;
> redir.filename = $2;
> $$ = make_redirection (source, r_reading_until, redir, 0);
> push_heredoc ($$);
> }
> [...]
> `need_here_doc` is used in `read_token()`, which is called by
> `yylex()`. This makes the behavior of `yylex()` non-automomous.
>
> It seems to me that the parsing code could be made simpler by making
> the parser reentrant. So there can be a parser parses anything not
> heredoc and another parser just parse heredoc. And there should
> different lexers for non-heredoc and heredoc. Is it so?
I'm a bit confused here: did you really mean "another parser", or did
you mean "another scanner"? If you do mean "another parser", I'm not
sure how you would coordinate the several layers.
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