Struct CfgFeature 

pub struct CfgFeature {
    pub hash: FeatureHash,
    pub skeleton_hash: FeatureHash,
    pub op_count: u32,
    pub skeleton_ops: u32,
    pub max_loop_depth: u32,
    pub branch_count: u32,
}

The approximate control-flow profile of one unit.

Built by one pre-order walk that emits a control-op byte sequence: loop, branch and match-arm enters and exits, a match enter carrying its arm count, and single ops for try, return, break, continue and calls. See the module documentation for why this is a syntactic approximation.

Fields

hash: FeatureHash

Hash over the control-op sequence.

skeleton_hash: FeatureHash

Hash over the same sequence with calls left out: the unit’s branching and looping shape alone.

A call is an operation the unit performs, not a fork in the path through it, and codehelion already describes calls separately in ApiCallFeature. Keeping them out of one of the two hashes gives a key that survives an edit which only adds calls, which is what makes it usable as a candidate-extraction index.

op_count: u32

Number of control ops emitted.

skeleton_ops: u32

Number of ops behind Self::skeleton_hash: op_count less the calls.

max_loop_depth: u32

Deepest loop nesting in the unit subtree; 0 without loops.

branch_count: u32

Number of two-way conditionals in the unit subtree.

Trait Implementations

impl Clone for CfgFeature

fn clone(&self) -> CfgFeature

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CfgFeature

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

Formats the value using the given formatter.

impl Eq for CfgFeature

impl PartialEq for CfgFeature

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CfgFeature