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package segments
import (
"fmt"
"strconv"
)
type Index struct {
idx int
}
func ParseIndexSegment(s string) (YamlPathSegment, error) {
if s[0] == '[' {
s = s[1 : len(s)-1]
}
idx, err := strconv.Atoi(s)
if err != nil {
return nil, err
}
return &Index{
idx: idx,
}, nil
}
func (p *Index) NavigateMap(m map[string]interface{}) (interface{}, error) {
return nil, fmt.Errorf("cannot index map")
}
func (p *Index) NavigateArray(l []interface{}) (interface{}, error) {
if len(l) <= p.idx {
return nil, fmt.Errorf("out of bounds %d (len %d)", p.idx, len(l))
}
return l[p.idx], nil
}
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