Enum CyclePolicy 

pub enum CyclePolicy {
    Error,
    Iterate {
        max_iterations: u32,
        max_change: f64,
    },
}

What happens to witnessed (live) cycles under CycleDetection::Runtime.

Variants

Error

Live cycles produce #CIRC!.

Iterate

Excel-style iterative calculation (RFC #113, spec §3.5/§6): live cycles keep running full passes over all SCC members in member order (Gauss–Seidel: each result is committed before the next member runs) until every member converges per the spec-§6 rules or max_iterations total passes (pass 1 included) have run. Hitting the cap keeps the last values and is NOT an error (Excel parity); telemetry records capped_sccs.

Fields

max_iterations: u32

Total passes per SCC per recalc, pass 1 included. 1 means each member evaluates exactly once per recalc (the Excel accumulator contract, spec §7.6); 0 is a config error.

max_change: f64

Absolute per-member convergence threshold on f64 serial values (|Δ| < max_change, strict — Excel semantics). Negative or non-finite values are config errors.

Implementations

impl CyclePolicy

pub const EXCEL_DEFAULT_MAX_ITERATIONS: u32 = 100

Excel’s default iterative-calculation knobs.

pub const EXCEL_DEFAULT_MAX_CHANGE: f64 = 0.001

Excel’s default maximum-change threshold.

pub fn iterate_excel_defaults() -> Self

Iterate with Excel’s defaults (100 iterations, 0.001 max change).

Trait Implementations

impl Clone for CyclePolicy

fn clone(&self) -> CyclePolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CyclePolicy

impl Debug for CyclePolicy

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

Formats the value using the given formatter.

impl Default for CyclePolicy

fn default() -> CyclePolicy

Returns the “default value” for a type.

impl PartialEq for CyclePolicy

fn eq(&self, other: &CyclePolicy) -> 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 StructuralPartialEq for CyclePolicy