2.0.0

[BenjaminHoegh]

Release 2.0.0 Highlights

• Configuration overhaul – internal configuration handling was re‑architected for better performance and memory use
• Emoji handling optimizations – emoji map is lazily loaded and cached; detection improved to check for emoji codes before loading the map
• Inline parsing speedups – added early returns and regex simplifications in inline methods; keystroke and smartypants patterns streamlined
• External link processing – refactored to minimize configuration checks and reduce per-link overhead
• Checkbox handling – input element generation simplified for task lists
• Table of Contents fixes – internal state reset after each parse to prevent data persistence across multiple parses
• Numerous performance improvements and refactoring across the parser core

Removed Deprecated configuration keys

• Removed abbreviations.allow_custom_abbr replaced by abbreviations.allow_custom
• Removed abbreviations.predefine replaced by abbreviations.predefined
• Removed emphasis.marking replaced by emphasis.mark
• Removed headings.allowed replaced by headings.allowed_levels
• Removed smarty replaced by smartypants
• Removed smarty.substitutions.left-angle-quote replaced by smartypants.substitutions.left_angle_quote
• Removed toc.toc_tag replaced by toc.tag
• Removed markup replaced by allow_raw_html
• Removed toc.headings replaced by toc.levels

[Copilot]

Pull Request Overview

This PR implements the 2.0.0 release, overhauling the internal configuration system and optimizing multiple parsing paths.

• Introduces a compiled configuration schema with bitmask-based feature flags and payloads.
• Adds constructor overrides support and lazy-loading caches (emoji map, smartypants substitutions).
• Updates tests to use renamed config keys (smartypants and headings.allowed_levels).

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
tests/TypographerTest.php	Renamed smarty config key to smartypants
tests/HeadingsTest.php	Renamed headings.allowed config key to headings.allowed_levels
src/ParsedownExtended.php	Bumped VERSION to 2.0.0; reworked constructor, config handling, inline parsers, removed deprecated methods, added early-return optimizations

Comments suppressed due to low confidence (2)

src/ParsedownExtended.php:1989

• [nitpick] This TODO-style comment is vague. Either clarify the exact scenario or remove it if it's no longer accurate.

    // BUG: Breaks formatting if written in a single line

src/ParsedownExtended.php:181

• You've introduced constructor overrides support but there are no tests covering it. Consider adding a unit test to verify overrides are applied correctly.

    public function __construct(array $overrides = [])