blob: d8f83a0fb3382ba59cdb67af5645c4c8622e485d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
#pragma once
#include <mbgl/util/variant.hpp>
#include <mbgl/style/function.hpp>
namespace mbgl {
namespace style {
class Undefined {};
template <class T>
class PropertyValue {
private:
using Value = variant<Undefined, T, Function<T>>;
Value value;
public:
PropertyValue() : value() {}
PropertyValue( T constant) : value(constant) {}
PropertyValue(Function<T> function) : value(function) {}
bool isUndefined() const { return value.which() == 0; }
bool isConstant() const { return value.which() == 1; }
bool isFunction() const { return value.which() == 2; }
const T & asConstant() const { return value.template get< T >(); }
const Function<T>& asFunction() const { return value.template get<Function<T>>(); }
explicit operator bool() const { return !isUndefined(); };
template <typename Visitor>
static auto visit(const PropertyValue<T>& value, Visitor&& visitor) {
return Value::visit(value.value, visitor);
}
};
} // namespace style
} // namespace mbgl
|
