* (112770879) “Washington, D.c.” capitalized incorrectly
Theoretically "." is a case-ignorable character, so "D.C." is conceptually the same as "DC", whose capitalized mapping would be "Dc". This behavior doesn't seem to align with real-world use cases well though. Workaround this by splitting the string with "." and titlecasing each substring individually.
* (112770879) “Washington, D.c.” capitalized incorrectly, cont.
For FoundationPreview: Move String comparison utilities from FoundationEssentials fo _FoundationInternals so they can be accessed from FoundationInternalization too.
We had a fast path implemented incorrectly: We search the UTF8 code unit whenever possible, and convert the found UTF8 index back to String index. If the conversion fails, i.e. when the found UTF8 index does not fall on a character boundary, we simply bail and return nil. The correct implementation should be advancing the slice from the point of failure and keeping searching.
But we don't really need this fast path here as we already have another one that skips string transformation inside the helper function. Let's just remove this.
* Use stdlib's `replacing(:with:)` instead of NSString's `replacingOccurrences(of:with:)`
* Move internal implementation of `_range(of:anchored:backwards:)` to _FoundationInternals. Update callsites to use this instead of NSString's `range(of:)` implementation.
Note: we should consider moving to stdlib's `firstRange(of:)` once rdar://109910336 is addressed.
* Add tests for _range(of:anchored:backwards:)
* rdar://107955097 (FoundationPreview: Batch move string API (continued))
- Move localized uppercase and lowercase to FoundationLocalization
- if-def out of CharacterSet from FoundationPreview. It's not implemented at all there, and having a no-op stub is misleading
* rdar://107955097 (FoundationPreview: Batch move string API (continued))
- Move components separated by string and range of string functions
* rdar://107955097 (FoundationPreview: Batch move string API (continued))
Enable snake case options for JSON encoder and decoder. We haven't been able to enable this option because it needed `CharacterSet`, which hasn't been properly implemented for FoundationPreview. Now that we have `BuiltInUnicodeScalarSet`, which mirrors `CharacterSet`, we can switch to that and enable the options.
* rdar://107955097 (FoundationPreview: Batch move string API (continued))
- Move `StringProtocol.lineRange(for:)` and `paragraphRange(for:)` to FoundationEssentials
- Rename String+Regex.swift to RegexPatternCache.swift
- Consolidate extensions on various String family members and remove one redundant swift file
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Co-authored-by: I-Ting Tina Liu <iting_liu@apple.com>
