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author | John Firebaugh <john.firebaugh@gmail.com> | 2016-10-28 16:39:50 -0700 |
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committer | John Firebaugh <john.firebaugh@gmail.com> | 2017-02-02 09:44:42 -0800 |
commit | 141e995806576364d185626176c1b993fc519291 (patch) | |
tree | ecdc41fc7699f2a1a9e9456157348451ebe99597 /include/mbgl/util | |
parent | 6a6bddb4537004cc1bfc506e76772de74d33f3f7 (diff) | |
download | qtlocation-mapboxgl-141e995806576364d185626176c1b993fc519291.tar.gz |
[core] Add support for data-driven styling
Diffstat (limited to 'include/mbgl/util')
-rw-r--r-- | include/mbgl/util/feature.hpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/mbgl/util/feature.hpp b/include/mbgl/util/feature.hpp index b72aa15ddd..4eeceda944 100644 --- a/include/mbgl/util/feature.hpp +++ b/include/mbgl/util/feature.hpp @@ -12,4 +12,21 @@ using PropertyMap = mapbox::geometry::property_map; using FeatureIdentifier = mapbox::geometry::identifier; using Feature = mapbox::geometry::feature<double>; +template <class T> +optional<T> numericValue(const Value& value) { + return value.match( + [] (uint64_t t) { + return optional<T>(t); + }, + [] (int64_t t) { + return optional<T>(t); + }, + [] (double t) { + return optional<T>(t); + }, + [] (auto) { + return optional<T>(); + }); +} + } // namespace mbgl |