Hi,
I'm trying to write a simple html lexer with ragel.
I have something looking like this, to match and take an action on the
attribute 'src=' potentially found in several tag attributes :
tag_content = (
('src='i ((('\'' string_sgl_exp) | '"' string_dbl_exp)
>src_attr_start
@src_attr_end))
| any
)** <>lerr{ };
tag_exp = tag_content :>> '>';
My problem is if I create an attribute <img srt="..."> (srt is not a proper
attribute, but it does generate a parse error).
What I'd like to do would be <>lerr{ fhold; fgoto tag_content; }, which
would work if tag_content was an entry point.
But I use tag_exp in several places where an entry point wouldn't work, for
instance :
img_tag := tag_exp [...] @end_img_action;
script_tag := tag_exp [...] @end_script_tag_action;
I've considered creating a ragel scanner, but I don't really care for
backtracking, I'd just like to be able to hide the error. This would work
exactly the way I want to, by doing a fgoto tag_content. It would basically
restart the parse on t='...' and have it would fall under the "any"
category.
Is there an elegant way to do this, or to just hide the error ?
Thank you,
Matthieu.
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