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Change Log

Unreleased

v0.5.2

Release date: 2024-03-28

Fixed

  • Optimization returns new grammar instead of mutating original (#44)
  • Make union of choice of character classes (#44)
  • Flag.STRICT now raises parsing errors in machine parser

v0.5.1

Release date: 2023-12-31

Python Support

  • Added support for Python 3.12

Fixed

  • Repetitions with mincount > 0 no longer reuse the instruction object (#38)

Maintenance

  • Use pyproject.toml instead of setup.cfg for project metadata
  • Use Ruff for linting (#36)
  • Update CI workflows, including OIDC trusted publishing

v0.5.0

Release date: 2023-07-26

Added

  • pe.operators.AutoIgnore (#6)
  • pe.patterns module (#6)
  • pe.patterns.DEFAULT_IGNORE (#6)
  • ignore parameter on pe.compile(), pe.match(), pe.packrat.PackratParser, and pe.machine.MachineParser (#6)

Changed

  • Line-breaking whitespace and tabs are escaped in debug context string (#31)

v0.4.0

Release date: 2023-06-04

Python Support

  • Removed support for Python 3.6, 3.7 (#23)
  • Added support for Python 3.10, 3.11 (#23)

Fixed

  • Parse errors on loading a grammar are now GrammarError (#21)

v0.3.2

Release date: 2021-10-05

Fixed

  • Regex optimization avoids some superfluous groups (#19)

Changed

  • Added more 'common' optimations: (#20)
    • Single-character classes become literals
    • Sequence of literals becomes one literal
    • Choice of non-negated character classes become one class

v0.3.1

Release date: 2021-09-30

Added

  • pe.Parser.modified_grammar attribute

Removed

  • pe.scanners is no longer part of the public API

Changed

  • Debug mode now prints the modified grammar when it has been optimized

Fixed

  • Capture choices properly in the machine parser (#17)
  • Character classes better handle multiple ranges (#18)

v0.3.0

Release date: 2021-09-28

Added

  • pe.Match.span() (#12)
  • pe.actions.Pair (#13)
  • negate parameter on pe.operators.Class
  • "Common" optimizations (currently only negated character classes) via the pe.COMMON flag
  • pe.scanners module for the low-level text scanners

Changed

  • Changed pe.Match.pos to pe.Match.start() (#12)
  • Changed pe.Match.end to pe.Match.end() (#12)
  • - is no longer an escapable character
  • pe.machine is now distributed as a compiled extension module

Fixed

  • pe.machine is now working again and passing the tests

v0.2.0

Release date: 2020-04-28

Added

  • pe.GrammarWarning (#7)
  • pe.actions.Action
  • pe.actions.Call
  • pe.actions.Raw
  • pe.actions.Bind
  • pe.actions.Getter (replaces pe.actions.first and pe.actions.last)
  • pe.actions.Warn (#7)
  • pe.operators.Debug (#9)

Removed

  • pe.actions.first
  • pe.actions.last
  • Concept of "value types" from specification and implementation
  • pe.Grammar.finalize() and pe.Grammar.final

Changed

  • Add MEMOIZE flag to grammar parser for better debugging
  • Functions in pe.actions (constant, pack, join, fail) are now subclasses of Action: Constant, Pack, Join, Fail.
  • pe.compile() no longer takes an open file or a single definition as input
  • Grammar vs Expression parsing is more consistent internally
  • Packrat parser handles the Debug operator (#9)
  • Grammar parser now warns on unlikely range (#7)
  • Rename "raw" to "capture" throughout

Fixed

  • Bug in definition formatting from partial reformatting

v0.1.0

Release date: 2020-04-14

This is the initial release with a functional Packrat recursive descent parser and a work-in-progress state-machine parser.