Struct ColdSlab 

struct ColdSlab {
    values: Vec<f64>,
    values_mirror: Vec<Value>,
    name_to_idx: HashMap<String, usize>,
}

Indexed slab for cold variables. The bytecode VM resolves cold names to slab indices at compile time and addresses them directly, skipping the HashMapContext probe + the String::from allocation that MilkContext::set would otherwise pay on every store.

Two parallel arrays are kept in sync:

• values: Vec<f64> — the VM’s fast path. Reads and writes happen here without going through the Value enum.
• values_mirror: Vec<Value> — used to back evalexpr’s Context::get_value(name) -> Option<&Value> contract, which requires handing out a reference to a Value we own.

name_to_idx resolves names on first reference (compile-time for VM-resolved blocks, runtime for evalexpr-driven set_value calls). Once interned, a name’s slot index is stable for the life of this MilkContext.

Fields

values: Vec<f64>

values_mirror: Vec<Value>

name_to_idx: HashMap<String, usize>

Implementations

impl ColdSlab

fn intern(&mut self, name: &str) -> usize

Return the slab index for name, allocating a fresh slot (initialised to 0.0) on first reference.

fn get_idx(&self, idx: usize) -> f64

fn set_idx(&mut self, idx: usize, val: f64)

fn get_by_name(&self, name: &str) -> Option<f64>

fn get_value_by_name(&self, name: &str) -> Option<&Value>

fn set_by_name(&mut self, name: &str, val: f64)

fn set_value_by_name(&mut self, name: &str, value: Value)

Trait Implementations

impl Clone for ColdSlab

fn clone(&self) -> ColdSlab

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColdSlab

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

Formats the value using the given formatter.

impl Default for ColdSlab

fn default() -> ColdSlab

Returns the “default value” for a type.