yv01p
1102b34e88
Implements Task 4 of the Utf8ToAsciiConverter refactor plan. Key features: - SIMD-optimized ASCII detection using SearchValues (AVX-512 capable) - Unicode normalization for accented characters (FormD decomposition) - FrozenDictionary for ligatures, Cyrillic, and special Latin mappings - Span-based API for zero-allocation scenarios - ArrayPool usage for temporary buffers - Comprehensive test coverage (21 unit tests, all passing) Implementation details: - Fast path for pure ASCII input (no conversion needed) - Dictionary lookup for special cases (ligatures, Cyrillic, etc.) - Unicode normalization fallback for accented characters - Control character stripping and whitespace normalization - Proper surrogate pair handling Test coverage: - Null/empty string handling - ASCII fast path verification - Accented character normalization (café → cafe) - Ligature expansion (Æ → AE, ß → ss, Œ → OE) - Cyrillic transliteration (Москва → Moskva, Щ → Shch) - Special Latin characters (Ł → L, Ø → O, Þ → TH) - Span API for zero-allocation scenarios - Mixed content handling Golden file tests are included for regression testing against the original implementation, though they require test data file configuration to run. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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