366 pub enum CachePolicy {  enum
383 impl FromStr for CachePolicy {  implementation
388             "never" | "Never" | "NEVER" => Ok(CachePolicy::Never),  in from_str()
389             "auto" | "Auto" | "AUTO" => Ok(CachePolicy::Auto),  in from_str()
390             "always" | "Always" | "ALWAYS" => Ok(CachePolicy::Always),  in from_str()
396 impl Default for CachePolicy {  implementation
398         CachePolicy::Auto  in default()
421     pub cache_policy: CachePolicy,
731             CachePolicy::Never => opts.set(  in do_open()
735             CachePolicy::Always => {  in do_open()
1101         if self.cfg.cache_policy == CachePolicy::Always {  in init()