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author | Anand Thakker <anandthakker@users.noreply.github.com> | 2017-11-08 12:34:02 -0500 |
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committer | GitHub <noreply@github.com> | 2017-11-08 12:34:02 -0500 |
commit | f648cfeef6544755fdb10c3cf8847e878d70e0ff (patch) | |
tree | 49800ebd34969b787681691f1219c6396ed58579 /include/mbgl/style/expression/coalesce.hpp | |
parent | 9aac976104f4c6453cf9e79e03a002565720f213 (diff) | |
download | qtlocation-mapboxgl-f648cfeef6544755fdb10c3cf8847e878d70e0ff.tar.gz |
Implement Expressions (#9439)
Ports https://github.com/mapbox/mapbox-gl-js/pull/4777 (and its several follow-ups)
Diffstat (limited to 'include/mbgl/style/expression/coalesce.hpp')
-rw-r--r-- | include/mbgl/style/expression/coalesce.hpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/mbgl/style/expression/coalesce.hpp b/include/mbgl/style/expression/coalesce.hpp new file mode 100644 index 0000000000..4e6a9b3793 --- /dev/null +++ b/include/mbgl/style/expression/coalesce.hpp @@ -0,0 +1,45 @@ +#pragma once + +#include <mbgl/style/expression/expression.hpp> +#include <mbgl/style/conversion.hpp> +#include <mbgl/style/expression/parsing_context.hpp> + +#include <memory> +#include <map> + +namespace mbgl { +namespace style { +namespace expression { + +class Coalesce : public Expression { +public: + using Args = std::vector<std::unique_ptr<Expression>>; + Coalesce(const type::Type& type_, Args args_) : + Expression(type_), + args(std::move(args_)) + {} + + static ParseResult parse(const mbgl::style::conversion::Convertible& value, ParsingContext& ctx); + + + EvaluationResult evaluate(const EvaluationContext& params) const override; + + void eachChild(const std::function<void(const Expression&)>& visit) const override; + + bool operator==(const Expression& e) const override; + + std::size_t getLength() const { + return args.size(); + } + + Expression* getChild(std::size_t i) const { + return args.at(i).get(); + } + +private: + Args args; +}; + +} // namespace expression +} // namespace style +} // namespace mbgl |