Struct EvictPolicy 

pub struct EvictPolicy {
    pub max_files: Option<usize>,
    pub max_bytes: Option<u64>,
    pub max_age: Option<Duration>,
}

Optional eviction controls applied by CacheGroup::ensure_dir_with_policy and CacheRoot::ensure_group_with_policy.

Rules are enforced in this order:

1. max_age (remove files older than or equal to threshold)
2. max_files (keep at most N files)
3. max_bytes (keep total bytes at or below threshold)

For max_files and max_bytes, candidates are ordered by modified time ascending (oldest first), then by path for deterministic tie-breaking.

Fields

max_files: Option<usize>

Maximum number of files to keep under the managed directory tree.

If exceeded, the oldest files are removed first until the count is <= max_files.

max_bytes: Option<u64>

Maximum total size in bytes to keep under the managed directory tree.

If exceeded, files are removed oldest-first until total bytes are <= max_bytes.

Notes:

• The limit applies to regular files recursively under the directory.
• Directories are not counted toward the byte total.
• Enforced only when using a policy-aware ensure_*_with_policy call.

max_age: Option<Duration>

Maximum file age allowed under the managed directory tree.

Files with age >= max_age are removed.

Trait Implementations

impl Clone for EvictPolicy

fn clone(&self) -> EvictPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EvictPolicy

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

Formats the value using the given formatter.

impl Default for EvictPolicy

fn default() -> EvictPolicy

Returns the “default value” for a type.

impl Eq for EvictPolicy

impl PartialEq for EvictPolicy

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for EvictPolicy