Method TraversalsByNameFunc

reflectx/reflect.go:184–201

TraversalsByNameFunc traverses the mapped names and calls fn with the index of each name and the struct traversal represented by that name. Panics if t is not a struct or Indirectable to a struct. Returns the first error returned by fn or nil.

(t reflect.Type, names []string, fn func(int, []int) error)

// each name and the struct traversal represented by that name. Panics if t is not
// a struct or Indirectable to a struct. Returns the first error returned by fn or nil.
func (m *Mapper) TraversalsByNameFunc(t reflect.Type, names []string, fn func(int, []int) error) error {
	t = Deref(t)
	mustBe(t, reflect.Struct)
	tm := m.TypeMap(t)
	for i, name := range names {
		fi, ok := tm.Names[name]
		if !ok {
			if err := fn(i, nil); err != nil {
				return err
			}
		} else {
			if err := fn(i, fi.Index); err != nil {
				return err
			}
		}
	}
	return nil
}

// FieldByIndexes returns a value for the field given by the struct traversal
// for the given value.