Method GetByTraversal

reflectx/reflect.go:44–57

GetByTraversal returns a *FieldInfo for a given integer path. It is analogous to reflect.FieldByIndex, but using the cached traversal rather than re-executing the reflect machinery each time.

(index []int)

// analogous to reflect.FieldByIndex, but using the cached traversal
// rather than re-executing the reflect machinery each time.
func (f StructMap) GetByTraversal(index []int) *FieldInfo {
	if len(index) == 0 {
		return nil
	}

	tree := f.Tree
	for _, i := range index {
		if i >= len(tree.Children) || tree.Children[i] == nil {
			return nil
		}
		tree = tree.Children[i]
	}
	return tree
}

// Mapper is a general purpose mapper of names to struct fields.  A Mapper
// behaves like most marshallers in the standard library, obeying a field tag