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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
0.097dev (GIT hash 4fdfc3160d9df4641ee0c680b4f89bf1eb6d4133)
last changed: 2026-06-24