internal library

Shared plumbing for the minted_* sibling packages. Not public API: no semver promise is made about anything here, and a consumer importing it is on their own.

It exists because Dart privacy is library-scoped, so helpers used by more than one sibling have to be importable to be shared at all. What lives here is exactly what more than one sector needs; a helper with a single sector travels with it (see AGENTS.md, repo layout).

The practical constraint: siblings resolve against any minted 3.x, so this is frozen within a major. Additive changes are fine, and a sibling raises its minted floor when it starts using one. Breaking changes wait for the next core major.

Constants

hexDigitsPerByte → const int
How many hex digits spell one byte.
hexRadix → const int
The radix hex is written in.
hyphen → const String
The hyphen a canonical form puts back after parsing, where the standard fixes its position.
zeroPad → const String
The character a fixed-width field is left-padded with.

Properties

cosmeticSeparators → RegExp
Whitespace and hyphens together: the separators a standard treats as cosmetic grouping, in a value whose charset excludes both. Stripped by Gtin, Imei, Isbn, Issn and PaymentCardNumber.
final
digitsOnly → RegExp
A whole string of nothing but decimal digits.
final
whitespace → RegExp
Whitespace alone, for a value whose charset is A-Z0-9 so a hyphen would be invalid rather than cosmetic. Stripped by Iban and Bic.
final

Functions

compact(String input) → String
input with its cosmetic grouping stripped. For Gtin, Imei and PaymentCardNumber, whose charsets are digits alone, so case-folding would be a no-op.
compactUpperCase(String input) → String
input compacted and case-folded, for a charset admitting letters too: Isbn, Isni, Issn.
decimalCodeUnit(int digitValue) → int
The ASCII code unit spelling digitValue, the inverse of decimalValue.
decimalValue(int codeUnit) → int
The value of a single decimal character, 0-9. Anything else yields -1, so a number assembled from junk fails validation downstream rather than throwing here.
decimalValues(String input, [int start = 0, int? end]) → List<int>
The values of input's characters from start to end (exclusive, the whole string when omitted), ready for Digits.tryFrom.
hexBytes(String hex) → Uint8List
The bytes hex spells, two digits per byte.
hexDigits(Iterable<int> bytes) → String
bytes as lowercase hex, two digits each: the inverse of hexBytes.
luhnCheckDigit(String bodyDigits) → String
The ISO/IEC 7812-1 Annex B (Luhn) mod-10 check digit for bodyDigits, everything before a card number's final digit, assumed already separator-free.
positiveZeroed(double value) → double
value with a negative zero's sign cleared, for GeoCoordinate and Percentage. -0.0 equals 0.0 and hashes alike, so it is only the rendered form that needs this.
unspacedUpperCase(String input) → String
input with whitespace alone stripped, then case-folded, for a charset where a hyphen is invalid rather than cosmetic: Bic, Iban, Isin.