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#pragma once
#include <mbgl/style/expression/expression.hpp>
#include <mbgl/style/expression/compound_expression.hpp>
namespace mbgl {
namespace style {
namespace expression {
template <typename T>
bool isGlobalPropertyConstant(const Expression& expression, const T& properties) {
if (expression.getKind() == Kind::CompoundExpression) {
auto e = static_cast<const CompoundExpression*>(&expression);
for (const std::string& property : properties) {
if (e->getOperator() == property) {
return false;
}
}
}
bool isConstant = true;
expression.eachChild([&](const Expression& e) {
if (isConstant && !isGlobalPropertyConstant(e, properties)) {
isConstant = false;
}
});
return isConstant;
}
bool isFeatureConstant(const Expression& expression);
bool isZoomConstant(const Expression& e);
} // namespace expression
} // namespace style
} // namespace mbgl
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