blob: 8c2f7c072fa0b0f28fa49b1ae7944276f253ba15 (
plain) (
blame)
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
|
package parser
import (
"strings"
)
const (
nullRep = "<null>"
)
// Node represents a node in the AST.
type Node interface {
// Pos returns the position of first character belonging to the node.
Pos() Pos
// End returns the position of first character immediately after the node.
End() Pos
// String returns a string representation of the node.
String() string
}
// IdentList represents a list of identifiers.
type IdentList struct {
LParen Pos
VarArgs bool
List []*Ident
RParen Pos
}
// Pos returns the position of first character belonging to the node.
func (n *IdentList) Pos() Pos {
if n.LParen.IsValid() {
return n.LParen
}
if len(n.List) > 0 {
return n.List[0].Pos()
}
return NoPos
}
// End returns the position of first character immediately after the node.
func (n *IdentList) End() Pos {
if n.RParen.IsValid() {
return n.RParen + 1
}
if l := len(n.List); l > 0 {
return n.List[l-1].End()
}
return NoPos
}
// NumFields returns the number of fields.
func (n *IdentList) NumFields() int {
if n == nil {
return 0
}
return len(n.List)
}
func (n *IdentList) String() string {
var list []string
for i, e := range n.List {
if n.VarArgs && i == len(n.List)-1 {
list = append(list, "..."+e.String())
} else {
list = append(list, e.String())
}
}
return "(" + strings.Join(list, ", ") + ")"
}
|
