/
ident_list.go
58 lines (45 loc) · 990 Bytes
/
ident_list.go
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package ast
import (
"strings"
"github.com/d5/tengo/compiler/source"
)
// IdentList represents a list of identifiers.
type IdentList struct {
LParen source.Pos
List []*Ident
RParen source.Pos
}
// Pos returns the position of first character belonging to the node.
func (n *IdentList) Pos() source.Pos {
if n.LParen.IsValid() {
return n.LParen
}
if len(n.List) > 0 {
return n.List[0].Pos()
}
return source.NoPos
}
// End returns the position of first character immediately after the node.
func (n *IdentList) End() source.Pos {
if n.RParen.IsValid() {
return n.RParen + 1
}
if l := len(n.List); l > 0 {
return n.List[l-1].End()
}
return source.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 _, e := range n.List {
list = append(list, e.String())
}
return "(" + strings.Join(list, ", ") + ")"
}