King_DuckZ/duckscraper
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Allow comments in scraplang.

Browse source 
Re-use the ini comment skipper I wrote for kamokan. Comments
are the same as ini files in scraplang, use #
This commit is contained in:
King_DuckZ 2020-04-02 16:42:35 +02:00
parent 5a9e4e09a4
commit 9cd2608406
2 changed files with 31 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
src/scraplang/parse.cpp
View file

@ -67,12 +67,14 @@ BOOST_FUSION_ADAPT_STRUCT(
)
namespace duck { namespace sl {
typedef kamokan::IniCommentSkipper<std::string_view::const_iterator> skipper_type;
std::vector<ScrapNode> parse (std::string_view parData) {
ScrapGrammar<std::string_view::const_iterator, boost::spirit::qi::ascii::blank_type> gramm;
ScrapGrammar<std::string_view::const_iterator, skipper_type> gramm;
auto it_start = parData.cbegin();
std::vector<ScrapNode> retval;
const bool ok = qi::phrase_parse(it_start, parData.cend(), gramm, sp::ascii::blank, retval);
const bool ok = qi::phrase_parse(it_start, parData.cend(), gramm, skipper_type(), retval);
std::cout << "parse ok: " << std::boolalpha << ok << '\n';
std::cout << "end == it: " << std::boolalpha << (parData.cend() == it_start) << '\n';

27
src/scraplang/scrapgrammar.hpp
View file

@ -19,6 +19,33 @@
#pragma once
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix_operator.hpp>
namespace kamokan {
template <typename Iterator>
struct IniCommentSkipper : boost::spirit::qi::grammar<Iterator> {
IniCommentSkipper() :
IniCommentSkipper::base_type(skipping),
first_char(true)
{
namespace px = boost::phoenix;
using boost::spirit::qi::blank;
using boost::spirit::qi::lit;
using boost::spirit::qi::eol;
using boost::spirit::qi::char_;
using boost::spirit::qi::eps;
skipping = comment | blank;
comment = (eps(px::cref(first_char) == true) | eol) >>
*blank >> lit("#")[px::ref(first_char) = false] >>
*(!eol >> char_);
}
boost::spirit::qi::rule<Iterator> skipping;
boost::spirit::qi::rule<Iterator> comment;
bool first_char;
};
} //namespace kamokan
namespace duck::sl {
namespace qi = ::boost::spirit::qi;