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font_feature_setting - upgrade parser to boost::spirit::x3

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This commit is contained in:
artemp 2016-08-24 09:35:46 +01:00
parent 67f5470d3e
commit ac35166073
1 changed files with 7 additions and 17 deletions
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24
src/text/font_feature_settings.cpp
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@ -26,11 +26,10 @@
#pragma GCC diagnostic push
#include <mapnik/warning_ignore.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/home/x3.hpp>
#include <boost/version.hpp>
#pragma GCC diagnostic pop
// stl
#include <algorithm>
#include <cctype>
@ -52,23 +51,14 @@ font_feature_settings::font_feature_settings()
void font_feature_settings::from_string(std::string const& features)
{
features_.clear();
if (std::all_of(features.begin(), features.end(), isspace)) return;
namespace qi = boost::spirit::qi;
qi::char_type char_;
qi::as_string_type as_string;
#if BOOST_VERSION <= 104800
// Call correct overload.
using std::placeholders::_1;
void (font_feature_settings::*append)(std::string const&) = &font_feature_settings::append;
if (!qi::parse(features.begin(), features.end(), as_string[+(char_ - ',')][std::bind(append, this, _1)] % ','))
#else
auto app = [&](std::string const& s) { append(s); };
if (!qi::parse(features.begin(), features.end(), as_string[+(char_ - ',')][app] % ','))
#endif
namespace x3 = boost::spirit::x3;
auto appender = [&](auto& ctx)
{
this->append(_attr(ctx));
};
if (!x3::parse(features.begin(), features.end(), (+(x3::char_ - ','))[appender] % ','))
{
throw config_error("failed to parse font-feature-settings: '" + features + "'");
}