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Fix for boost < 1.70.0 (ref #4143)

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This commit is contained in:
Artem Pavlenko 2020-05-12 12:14:18 +01:00
parent a14d27f090
commit cc78a5de78
1 changed files with 10 additions and 2 deletions
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12
include/mapnik/json/feature_generator_grammar.hpp
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@ -91,15 +91,23 @@ BOOST_FUSION_ADAPT_ADT(
(mapnik::kv_store const, mapnik::kv_store const, mapnik::kv_store(obj), /**/))
namespace mapnik { namespace json {
namespace detail {
template <typename T>
#if BOOST_VERSION >= 107000
struct attribute_type { using type = T();};
#else
struct attribute_type { using type = T const&();};
#endif
}
namespace karma = boost::spirit::karma;
template <typename OutputIterator, typename FeatureType>
struct feature_generator_grammar :
karma::grammar<OutputIterator, FeatureType const&()>
karma::grammar<OutputIterator, typename detail::attribute_type<FeatureType>::type>
{
feature_generator_grammar();
karma::rule<OutputIterator, FeatureType const&()> feature;
karma::rule<OutputIterator, typename detail::attribute_type<FeatureType>::type> feature;
geometry_generator_grammar<OutputIterator, mapnik::geometry::geometry<double>> geometry;
properties_generator_grammar<OutputIterator, mapnik::kv_store> properties;
};