-
Notifications
You must be signed in to change notification settings - Fork 170
/
message.go
199 lines (181 loc) · 5.56 KB
/
message.go
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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
package ast
import "fmt"
// MessageDeclNode is a node in the AST that defines a message type. This
// includes normal message fields as well as implicit messages:
// - *MessageNode
// - *GroupNode (the group is a field and inline message type)
// - *MapFieldNode (map fields implicitly define a MapEntry message type)
//
// This also allows NoSourceNode to be used in place of one of the above
// for some usages.
type MessageDeclNode interface {
Node
MessageName() Node
}
var _ MessageDeclNode = (*MessageNode)(nil)
var _ MessageDeclNode = (*GroupNode)(nil)
var _ MessageDeclNode = (*MapFieldNode)(nil)
var _ MessageDeclNode = NoSourceNode{}
// MessageNode represents a message declaration. Example:
//
// message Foo {
// string name = 1;
// repeated string labels = 2;
// bytes extra = 3;
// }
type MessageNode struct {
compositeNode
Keyword *KeywordNode
Name *IdentNode
MessageBody
}
func (*MessageNode) fileElement() {}
func (*MessageNode) msgElement() {}
// NewMessageNode creates a new *MessageNode. All arguments must be non-nil.
// - keyword: The token corresponding to the "message" keyword.
// - name: The token corresponding to the field's name.
// - openBrace: The token corresponding to the "{" rune that starts the body.
// - decls: All declarations inside the message body.
// - closeBrace: The token corresponding to the "}" rune that ends the body.
func NewMessageNode(keyword *KeywordNode, name *IdentNode, openBrace *RuneNode, decls []MessageElement, closeBrace *RuneNode) *MessageNode {
if keyword == nil {
panic("keyword is nil")
}
if name == nil {
panic("name is nil")
}
if openBrace == nil {
panic("openBrace is nil")
}
if closeBrace == nil {
panic("closeBrace is nil")
}
children := make([]Node, 0, 4+len(decls))
children = append(children, keyword, name, openBrace)
for _, decl := range decls {
children = append(children, decl)
}
children = append(children, closeBrace)
ret := &MessageNode{
compositeNode: compositeNode{
children: children,
},
Keyword: keyword,
Name: name,
}
populateMessageBody(&ret.MessageBody, openBrace, decls, closeBrace)
return ret
}
func (n *MessageNode) MessageName() Node {
return n.Name
}
// MessageBody represents the body of a message. It is used by both
// MessageNodes and GroupNodes.
type MessageBody struct {
OpenBrace *RuneNode
Decls []MessageElement
CloseBrace *RuneNode
}
func populateMessageBody(m *MessageBody, openBrace *RuneNode, decls []MessageElement, closeBrace *RuneNode) {
m.OpenBrace = openBrace
m.Decls = decls
for _, decl := range decls {
switch decl.(type) {
case *OptionNode, *FieldNode, *MapFieldNode, *GroupNode, *OneOfNode,
*MessageNode, *EnumNode, *ExtendNode, *ExtensionRangeNode,
*ReservedNode, *EmptyDeclNode:
default:
panic(fmt.Sprintf("invalid MessageElement type: %T", decl))
}
}
m.CloseBrace = closeBrace
}
// MessageElement is an interface implemented by all AST nodes that can
// appear in a message body.
type MessageElement interface {
Node
msgElement()
}
var _ MessageElement = (*OptionNode)(nil)
var _ MessageElement = (*FieldNode)(nil)
var _ MessageElement = (*MapFieldNode)(nil)
var _ MessageElement = (*OneOfNode)(nil)
var _ MessageElement = (*GroupNode)(nil)
var _ MessageElement = (*MessageNode)(nil)
var _ MessageElement = (*EnumNode)(nil)
var _ MessageElement = (*ExtendNode)(nil)
var _ MessageElement = (*ExtensionRangeNode)(nil)
var _ MessageElement = (*ReservedNode)(nil)
var _ MessageElement = (*EmptyDeclNode)(nil)
// ExtendNode represents a declaration of extension fields. Example:
//
// extend google.protobuf.FieldOptions {
// bool redacted = 33333;
// }
type ExtendNode struct {
compositeNode
Keyword *KeywordNode
Extendee IdentValueNode
OpenBrace *RuneNode
Decls []ExtendElement
CloseBrace *RuneNode
}
func (*ExtendNode) fileElement() {}
func (*ExtendNode) msgElement() {}
// NewExtendNode creates a new *ExtendNode. All arguments must be non-nil.
// - keyword: The token corresponding to the "extend" keyword.
// - extendee: The token corresponding to the name of the extended message.
// - openBrace: The token corresponding to the "{" rune that starts the body.
// - decls: All declarations inside the message body.
// - closeBrace: The token corresponding to the "}" rune that ends the body.
func NewExtendNode(keyword *KeywordNode, extendee IdentValueNode, openBrace *RuneNode, decls []ExtendElement, closeBrace *RuneNode) *ExtendNode {
if keyword == nil {
panic("keyword is nil")
}
if extendee == nil {
panic("extendee is nil")
}
if openBrace == nil {
panic("openBrace is nil")
}
if closeBrace == nil {
panic("closeBrace is nil")
}
children := make([]Node, 0, 4+len(decls))
children = append(children, keyword, extendee, openBrace)
for _, decl := range decls {
children = append(children, decl)
}
children = append(children, closeBrace)
ret := &ExtendNode{
compositeNode: compositeNode{
children: children,
},
Keyword: keyword,
Extendee: extendee,
OpenBrace: openBrace,
Decls: decls,
CloseBrace: closeBrace,
}
for _, decl := range decls {
switch decl := decl.(type) {
case *FieldNode:
decl.Extendee = ret
case *GroupNode:
decl.Extendee = ret
case *EmptyDeclNode:
default:
panic(fmt.Sprintf("invalid ExtendElement type: %T", decl))
}
}
return ret
}
// ExtendElement is an interface implemented by all AST nodes that can
// appear in the body of an extends declaration.
type ExtendElement interface {
Node
extendElement()
}
var _ ExtendElement = (*FieldNode)(nil)
var _ ExtendElement = (*GroupNode)(nil)
var _ ExtendElement = (*EmptyDeclNode)(nil)