parser

type FieldInfo struct {
	Name       string
	Type       reflect.Type
	Tag        *TagSpec
	Index      []int
	IsEmbedded bool
	FieldName  string
}

type StructInfo struct {
	Fields []FieldInfo
}

type TagSpec struct {
	EnvVar     string
	FileKey    string
	Default    string
	Required   bool
	Prefix     string
	Separator  string
	Format     string
	Validators []Validator
}

type Validator struct {
	Name   string
	Params []string
}