Module util 

Shared utilities: errors, validation helpers, domain newtypes.

Modules

error

Error types and validation for finance calculations.

primitives

Domain newtypes — zero-cost wrappers that make invalid values harder to pass by accident.

Structs

Money

Finite signed monetary amount (no currency unit — pure magnitude + sign).

PeriodLength

Positive lookback / window length for technical indicators (usize ≥ 1).

Periods

Count of compounding / payment periods (u32).

PositivePrice

Strictly positive finite price (or similar quantity used as a price level).

Rate

Periodic or continuous interest / return rate as a decimal (e.g. 0.05 = 5%).

Enums

FinanceError

Domain and input errors from finance calculations.

Type Aliases

FinanceResult

Result alias for fallible finance functions.