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package treeprint
import (
"reflect"
"strings"
)
func isEmpty(v *reflect.Value) bool {
switch v.Kind() {
case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
return v.Len() == 0
case reflect.Bool:
return !v.Bool()
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return v.Int() == 0
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return v.Uint() == 0
case reflect.Float32, reflect.Float64:
return v.Float() == 0
case reflect.Interface, reflect.Ptr:
return v.IsNil()
}
return false
}
func tagSpec(tag string) (name string, omit bool) {
parts := strings.Split(tag, ",")
if len(parts) < 2 {
return tag, false
}
if parts[1] == "omitempty" {
return parts[0], true
}
return parts[0], false
}
func filterTags(tag reflect.StructTag) string {
tags := strings.Split(string(tag), " ")
filtered := make([]string, 0, len(tags))
for i := range tags {
if strings.HasPrefix(tags[i], "tree:") {
continue
}
filtered = append(filtered, tags[i])
}
return strings.Join(filtered, " ")
}