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Add Arabic abjad numerals #170

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Merged
MDLC01 merged 7 commits into from
Jun 3, 2026
Merged

Add Arabic abjad numerals #170

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cf51966
Update numeral_systems.rs
seloumi May 28, 2026
6c2ddee
Apply suggestions from code review
seloumi May 28, 2026
bc63e0d
Update src/numeral_systems.rs
seloumi May 29, 2026
3ce0c40
Fix Arabic letter representation in numeral systems
seloumi May 29, 2026
5bb0f0a
Merge branch 'typst:main' into main
seloumi Jun 1, 2026
6762acd
Update src/numeral_systems.rs
seloumi Jun 1, 2026
039ae01
Update src/numeral_systems.rs
seloumi Jun 1, 2026
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33 changes: 33 additions & 0 deletions src/numeral_systems.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -408,6 +408,33 @@ declare_named! {
/// > <span dir="auto">٨</span>, <span dir="auto">٩</span>,
/// > <span dir="auto">١٠</span>, <span dir="auto">١١</span>
EasternArabic = "arabic.eastern" ("١"),

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/// Abjad order
/// [Arabic letters](https://en.wikipedia.org/wiki/Abjad).
///
/// ## Representable Numbers
///
/// All non-negative integers can be represented.
///
/// ## Example
///
/// The first twenty-eight positive integers are represented as follows:
///
/// > <span dir="auto">أ</span>, <span dir="auto">ب</span>,
/// > <span dir="auto">ج</span>, <span dir="auto">د</span>,
/// > <span dir="auto">ه</span>, <span dir="auto">و</span>,
/// > <span dir="auto">ز</span>, <span dir="auto">ح</span>,
/// > <span dir="auto">ط</span>, <span dir="auto">ي</span>,
/// > <span dir="auto">ك</span>, <span dir="auto">ل</span>
/// > <span dir="auto">م</span>, <span dir="auto">ن</span>
/// > <span dir="auto">س</span>, <span dir="auto">ع</span>
/// > <span dir="auto">ف</span>, <span dir="auto">ص</span>
/// > <span dir="auto">ق</span>, <span dir="auto">ر</span>
/// > <span dir="auto">ش</span>, <span dir="auto">ت</span>
/// > <span dir="auto">ث</span>, <span dir="auto">خ</span>
/// > <span dir="auto">ذ</span>, <span dir="auto">ض</span>
/// > <span dir="auto">ظ</span>, <span dir="auto">غ</span>
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ArabicAbjad = "arabic.abjad" ("أ"),

/// Decimal positional notation using the Persian variant of
/// [Eastern Arabic numerals](https://en.wikipedia.org/wiki/Eastern_Arabic_numerals#Numerals).
Expand Down Expand Up @@ -821,6 +848,11 @@ impl NamedNumeralSystem {
Self::EasternArabic => NumeralSystem::Positional(&[
'٠', '١', '٢', '٣', '٤', '٥', '٦', '٧', '٨', '٩',
]),

Self::ArabicAbjad => NumeralSystem::Bijective(&[
'أ', 'ب', 'ج', 'د', 'ه', 'و', 'ز', 'ح', 'ط', 'ي', 'ك', 'ل', 'م', 'ن',
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'س', 'ع', 'ف', 'ص', 'ق', 'ر', 'ش', 'ت', 'ث', 'خ', 'ذ', 'ض', 'ظ', 'غ',
]),
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Self::Persian => NumeralSystem::Positional(&[
'۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹',
Expand Down Expand Up @@ -1435,6 +1467,7 @@ mod tests {
NamedNumeralSystem::KoreanJamo => 65477685939649764827530478995838083425, // 21
NamedNumeralSystem::KoreanSyllable => 24217153056183571894327643661698510954,
NamedNumeralSystem::EasternArabic => 277754701051910363703826860323053920831,
NamedNumeralSystem::ArabicAbjad => 332217778941065507236060222268877272547,
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NamedNumeralSystem::Persian => 6232158096065129450489636457808686806,
NamedNumeralSystem::Devanagari => 327133969362282954753636774557232534052,
NamedNumeralSystem::Tibetan => 87580519645280744681237273097105390953,
Expand Down
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