Re: Parse succeeds, but doesn't propagate to first attribute with extra actions.
Dan Bloomquist <[email protected]> Mon, 18 Nov 2019 17:40:50 -0800
| Newsgroups | gmane.comp.parsers.spirit.general |
|---|---|
| Message-ID | <[email protected]> |
Dan Bloomquist wrote:
> I started here. ...
I'm gathering, even if I could not find it, that any semantic action
will kill attribute propagation globally for the given target. At least,
that is what I'm seeing. So, I just did it all with SA. The part where I
make '= true/false' is verbose, I'm working on that. But this works.
Best, Dan.
#include <iostream>
#include <boost/fusion/adapted/struct.hpp>
#include <boost/spirit/home/x3.hpp>
struct font {
std::string face_name;
size_t point=0;
bool bold=false;
bool italic = false;
bool strike = false;
size_t id=0;
};
namespace parsers {
using namespace boost::spirit::x3;
auto const face = [](auto& attr) { _val(attr).face_name =
_attr(attr); };
auto const point = [](auto& attr) { _val(attr).point = _attr(attr); };
auto const bold = [](auto& attr) { _val(attr).bold = _attr(attr); };
auto const italic = [](auto& attr) { _val(attr).italic =
_attr(attr); };
auto const strike = [](auto& attr) { _val(attr).strike =
_attr(attr); };
auto word = lexeme[+char_("a-zA-Z")];
auto words = lexeme[+char_("a-zA-Z ")];
auto font_parser = rule<struct _, font>() =
lit("font(") >> words[face] >>
*(
lit("size") >> '=' >> int_[point]
| lit("bold") >> (('=' >> bool_[bold]) | attr(true)[bold])
| lit("italic") >> (('=' >> bool_[italic]) |
attr(true)[italic])
| lit("strike") >> (('=' >> bool_[strike]) |
attr(true)[strike])
) % ';';
}
int main() {
font afont;
std::string target;
std::string test_str("font(Times New
Roman;size=12;bold=true;italic);circle");
auto begin = test_str.begin();
phrase_parse(begin, test_str.end(), parsers::font_parser,
boost::spirit::x3::space, afont);
return 0;
}
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