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Changelog

phil/tax

All notable changes to phil/tax will be documented in this file.

Updates should follow the Keep a CHANGELOG principles.

0.1.0-alpha - 2026-11-11

Added

  • TaxRate: a code and a share in parts per million; of(), ofPercent(), percent(), equals(), and taxOn() rounding half away from zero in integer arithmetic.
  • TaxLine, computed or reported, and reversed().
  • TaxBreakdown: lines on one base, each rate code once; line(), totalTax(), totalWithTax(), reversed().
  • MultiRateTaxCalculator: every rate on the same base, one line each; extract(), the taxes included in a price, and the base they leave.
  • TaxException, implemented by InvalidTaxRate, InvalidBreakdown and UntaxableBase.
  • The documentation in doc/, one file per topic, indexed by the README.
  • CONTRIBUTING.md, SECURITY.md and CODE_OF_CONDUCT.md.