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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
#pragma once
#include <vector>
#include <mbgl/util/optional.hpp>
#include <mbgl/util/variant.hpp>
namespace mbgl {
namespace style {
namespace expression {
namespace type {
class Primitive;
class Variant;
class Array;
class NArgs;
class Typename;
class Lambda;
using ValueType = variant<
Primitive,
Typename,
mapbox::util::recursive_wrapper<Variant>,
mapbox::util::recursive_wrapper<Array>,
mapbox::util::recursive_wrapper<NArgs>>;
using Type = variant<
Primitive,
Typename,
Variant,
Array,
NArgs,
Lambda>;
class Primitive {
public:
std::string getName() const { return name; }
static Primitive Null;
static Primitive Number;
static Primitive String;
static Primitive Color;
static Primitive Object;
// It's weird for this to be on Primitive. Where should it go?
static Type Value;
private:
std::string name;
Primitive(std::string name_) : name(name_) {}
};
class Typename {
public:
Typename(std::string name_) : name(name_) {}
std::string getName() const { return name; }
private:
std::string name;
};
class Array {
public:
Array(ValueType itemType_) : itemType(itemType_) {}
Array(ValueType itemType_, int N_) : itemType(itemType_), N(N_) {}
std::string getName() const {
return "array";
}
private:
ValueType itemType;
optional<int> N;
};
class Variant {
public:
Variant(std::vector<ValueType> members_) : members(members_) {}
std::string getName() const {
return "variant";
}
std::vector<ValueType> getMembers() {
return members;
}
private:
std::vector<ValueType> members;
};
class NArgs {
public:
NArgs(std::vector<ValueType> types_) : types(types_) {}
std::string getName() const {
return "nargs";
}
private:
std::vector<ValueType> types;
};
class Lambda {
public:
Lambda(ValueType result_, std::vector<ValueType> params_) :
result(result_),
params(params_)
{}
std::string getName() const {
return "lambda";
}
ValueType getResult() const { return result; }
private:
ValueType result;
std::vector<ValueType> params;
};
} // namespace type
} // namespace expression
} // namespace style
} // namespace mbgl
|
