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is_ascii_letter

codepoint.is_ascii_letter

is this an ASCII letter i.e. A-Z or a-z

NYI: PERFORMANCE: this is way slower, should investigate how/if to cache this Set union.
public is_ascii_letter bool => codepoint.latin_alphabet.contains val
0.095dev (2026-02-20 12:42:29 GIT hash dbcc3e4b3d2a59f66230b482cff8f0b018178d77 built by fridi@fzen)
last changed: 2026-02-20