Struct Options 

pub struct Options {
    pub enabled: bool,
    pub mode: Mode,
    pub explain: bool,
    pub max_entries: Option<usize>,
}

Everything the store needs from outside itself.

Built once, by the caller that is already reading flags and the environment, and passed in. Nothing in this module reaches for std::env: a run’s behaviour is decided in one place, so reading that place tells you what the run will do.

Fields

enabled: bool

--no-cache turns this off. Separate from how the cache is grained.

mode: Mode

How much of a run one entry covers. Held here rather than decided per lookup, so the whole run reads and writes the same grain.

explain: bool

Say why lookups missed, and what the run did with the store.

max_entries: Option<usize>

Entries a project’s store may hold. None scales it to the project size.

Implementations

impl Options

The switches every reader of the store honours, from the environment: HTL_NO_CACHE (neither read nor write), HTL_CACHE_DEBUG (say why lookups missed), HTL_CACHE_MAX_ENTRIES (the sweep’s bound; the test suite’s, since nothing else can reach a few hundred entries by honest means). A command’s flags override what this read; the proc macros have no flags and take this as it is.

pub fn from_env() -> Self

The options the environment asks for, before any flag is applied.

Trait Implementations

impl Clone for Options

fn clone(&self) -> Options

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Options

impl Debug for Options

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

Formats the value using the given formatter.

impl Default for Options

fn default() -> Self

Returns the “default value” for a type.