Struct OptMeta 

pub struct OptMeta {

    pub opt: Opt,
    pub keyword: &'static str,
    pub label: &'static str,
    pub group: &'static str,
    pub default_on: bool,
    pub paths: u8,
    pub emits_unsafe: bool,
    pub mem_class: MemClass,
    pub cost: OptCost,
    pub requires: &'static [Opt],
    pub conflicts: &'static [Opt],
    pub preempts: &'static [Opt],
    pub scope: Scope,
}

One row of the optimization registry — the complete static description of a single optimization. Adding an optimization means adding one Opt variant and one row here; nothing else hardcodes the list.

Fields

opt: Opt

The optimization this row describes.

keyword: &'static str

The ## No <Keyword> decorator word (lowercase, single token).

label: &'static str

Human-readable label for UIs.

group: &'static str

Which group the UI files this under.

default_on: bool

Whether this optimization is on in the default (all-on, speed) config.

paths: u8

Execution paths it affects (bitmask of path constants).

emits_unsafe: bool

Whether enabling it can emit unsafe Rust (disabled by the Safety profile).

mem_class: MemClass

Its memory/speed trade-off classification.

cost: OptCost

How expensive the pass is to run — the hotness tier at which the tiered optimizer starts paying for it (HOTSWAP §3). For every row, cost(requires) ≤ cost, so a tier that admits this opt admits its deps.

requires: &'static [Opt]

Optimizations that must be on for this one to apply; if any is off, normalize turns this one off too.

conflicts: &'static [Opt]

Optimizations mutually exclusive with this one — GLOBAL exclusion (both on → normalize disables the later-declared). Distinct from preempts.

preempts: &'static [Opt]

Optimizations this one takes PRECEDENCE over, per instance: when both are enabled, this one is tried/applied first for a given function/loop/array/ map, and the listed ones act as the fallback for the instances it did not claim. Both stay enabled (unlike conflicts); the listed optimization fires only where this one declined. Disabling THIS one is what can let a preempted optimization surface — the edge the menu-tree walks.

scope: Scope

Where its decorator may appear.

Trait Implementations

impl Clone for OptMeta

fn clone(&self) -> OptMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptMeta

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

Formats the value using the given formatter.

impl Copy for OptMeta