astralNumerals top-level constant

String const astralNumerals

The astral planes in Unicode comprise supplementary code points that reside outside of the Basic Multilingual Plane (BMP).

These characters are represented in UTF-16 (which Dart strings use) through surrogate pairs.

This pattern is tailored to capture numerals from various scripts and numeral systems present within these astral planes, ensuring compatibility with ancient scripts, specialized numeral notations, and more.

The specific numeral systems matched by this pattern include, but are not limited to:

• U+104A0 to U+104A9: Osmanya
• U+11066 to U+1106F: Brahmi ... and others from scripts like Sora Sompeng, Chakma, and more.

Implementation

const astralNumerals =
    r'\ud801[\udca0-\udca9]|\ud804[\udc66-\udc6f\udcf0-\udcf9\udd36-\udd3f\uddd0-\uddd9\udef0-\udef9]|\ud805[\udcd0-\udcd9\ude50-\ude59\udec0-\udec9]|\ud806[\udce0-\udce9]|\ud81a[\ude60-\ude69\udf50-\udf59]|\ud835[\udfce-\udfff]';