Enum HashNameRule 

pub enum HashNameRule {
    Default,
    Hash(HashAlgo),
}

hashName 规则 — 对齐 PHP File::hashName($rule) 第 180-203 行

PHP $rule 支持 3 种类型：

1. Closure → call_user_func_array($rule, [$this])
2. string 在 hash_algos() 中 → substr(hash, 0, 2) . '/' . substr(hash, 2)
3. callable 字符串 → call_user_func($rule)
4. default → date('Ymd') . '/' . md5(microtime(true) . pathname)

Rust 端简化为 2 种（Closure/callable 实际业务极少使用）：

• HashNameRule::Default：默认规则
• HashNameRule::Hash：hash 算法规则

Variants

Default

默认规则：date('Ymd') . '/' . md5(microtime(true) . pathname)

对齐 PHP 第 195 行

Hash(HashAlgo)

hash 算法规则：substr(hash, 0, 2) . '/' . substr(hash, 2)

对齐 PHP 第 187-190 行

Trait Implementations

impl Clone for HashNameRule

fn clone(&self) -> HashNameRule

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for HashNameRule

impl Debug for HashNameRule

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for HashNameRule

fn default() -> HashNameRule

Returns the “default value” for a type.

impl Eq for HashNameRule

impl PartialEq for HashNameRule

fn eq(&self, other: &HashNameRule) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for HashNameRule