Struct BaseRate 

pub struct BaseRate {
    pub merges: usize,
    pub reverted: usize,
    pub commits: usize,
    pub revert_commits: usize,
    pub window: usize,
}

Base rate over a labelled history.

Fields

merges: usize

Merges examined.

reverted: usize

Merges reverted within the window.

commits: usize

Commits in the history that was scanned, for context: a rate over 40 merges and a rate over 40,000 are not the same evidence.

revert_commits: usize

Commits that revert anything, anywhere in the scanned history.

This is the corpus-suitability signal, and measuring git/git is what showed it was needed: 15,579 merges, 46 revert commits in the whole first-parent history, giving a labelled rate of 0.001. That is not “git’s merges are 99.9% safe” — it is a project that drops bad topics from an integration branch before they reach the mainline instead of reverting them. The proxy measures revert culture, and where there is none it reads as safety.

A corpus with near-zero reverts cannot supply a base rate at all. Check this before believing Self::rate.

window: usize

The window the labelling used, in commits.

Implementations

impl BaseRate

pub fn rate(&self) -> f64

Reverted merges as a fraction of merges, in 0.0..=1.0.

A lower bound on the true bad-merge rate, for the reasons in the module docs. A history with no merges scores 0.0 rather than dividing by zero — check Self::merges before believing it.

pub fn corpus_is_suitable(&self) -> bool

Whether the corpus reverts often enough for Self::rate to mean anything, at a deliberately low bar: at least one revert commit per 200 scanned commits.

The threshold is a judgement, not a measurement, and it is set where it is because git/git sits an order of magnitude below it (46 reverts in 24,234 first-parent commits) while a merge-queue-driven project sits above. A false here means “find another corpus”, never “this project’s merges are safe”.

Trait Implementations

impl Clone for BaseRate

fn clone(&self) -> BaseRate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BaseRate

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

Formats the value using the given formatter.

impl PartialEq for BaseRate

fn eq(&self, other: &BaseRate) -> 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 Eq for BaseRate

impl StructuralPartialEq for BaseRate