41 lines
1.4 KiB
C++
41 lines
1.4 KiB
C++
#include <mbgl/style/function/convert.hpp>
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namespace mbgl {
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namespace style {
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namespace expression {
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std::unique_ptr<Expression> Convert::fromIdentityFunction(const std::string& property, type::Type type) {
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return type.match(
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[&] (const type::StringType&) {
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return makeGet(type::String, property);
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},
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[&] (const type::NumberType&) {
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return makeGet(type::Number, property);
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},
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[&] (const type::BooleanType&) {
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return makeGet(type::Boolean, property);
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},
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[&] (const type::ColorType&) {
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std::vector<std::unique_ptr<Expression>> args;
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args.push_back(makeGet(type::String, property));
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return std::make_unique<Coercion>(type::Color, std::move(args));
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},
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[&] (const type::Array& arr) {
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std::vector<std::unique_ptr<Expression>> getArgs;
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getArgs.push_back(makeLiteral(property));
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ParsingContext ctx;
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ParseResult get = createCompoundExpression("get", std::move(getArgs), ctx);
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assert(get);
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assert(ctx.getErrors().size() == 0);
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return std::make_unique<ArrayAssertion>(arr, std::move(*get));
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},
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[&] (const auto&) -> std::unique_ptr<Expression> {
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return makeLiteral(Null);
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}
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);
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}
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} // namespace expression
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} // namespace style
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} // namespace mbgl
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