(Ara) Add a paradigm for relative adjectives

src/arabic/ParadigmsAra.gf

@@ -76,7 +76,7 @@ resource ParadigmsAra = open
 ---    = sdfN ;
    } ;
 
-  dualN : N -> N ;
+  dualN : N -> N ; -- Force the plural of the N into dual (e.g. "twins")
 
 --This is used for loan words or anything that has untreated irregularities
 --in the interdigitization process of its words
@@ -130,16 +130,15 @@ resource ParadigmsAra = open
 -- Overloaded operator for main cases
 
  mkA = overload {
-   mkA : (root,patt : Str) -> A
+   mkA : (root,sg : Str) -> A             -- adjective with sound plural; takes root string and sg. pattern string
     = \r,p -> lin A (sndA r p);
-   mkA : (root : Str) -> A                -- forms adjectives with positive form aFCal
+   mkA : (root : Str) -> A                -- adjective with positive form aFCal
     = \r -> lin A (clrA r);
-   mkA : (root,sg,pl : Str) -> A
+   mkA : (root,sg,pl : Str) -> A          -- adjective with broken plural
     = \r,s,p -> lin A (brkA r s p) ;
-   -- mkA : (posit,compar,plur : Str) -> A
-   --  = degrA ;
    } ;
 
+  degrA : (posit,compar,plur : Str) -> A ;
 
 --Takes a root string and a pattern string
   sndA : (root,patt : Str) -> Adj ;
@@ -147,6 +146,8 @@ resource ParadigmsAra = open
 --Takes a root string only
   clrA : (root : Str) -> Adj ;  -- forms adjectives of type aFCal
 
+  nisbaA : Str -> Adj ; -- forms relative adjectives by adding the suffix ِيّ
+
 --3 Two-place adjectives
 --
 -- Two-place adjectives need a preposition for their second argument.
@@ -637,6 +638,14 @@ resource ParadigmsAra = open
         }
     };
 
+  nisbaA : Str -> Adj = \Haal ->
+    let Haaliyy = Haal + "ِيّ" in {
+      s = table {
+        APosit g n d c  => positAdj Haaliyy ! g ! n ! d ! c ;
+        AComp d c => "أَكْثَر" ++ indeclN Haaliyy ! d ! c
+        }
+    } ;
+
   clrA root =
     let { eaHmar = mkWord "أَفعَل" root;
           HamrA' = mkWord "فَعلاء" root;

src/arabic/ResAra.gf

@@ -966,6 +966,7 @@ patHollowImp : (_,_ :Str) -> Gender => Number => Str =\xaf,xAf ->
     -- determine the declension and gives the corresponding inf table
     sing : Str -> State => Case => Str = \word ->
       \\s,c => defArt s (case word of {
+        lemma + "ِيّ" => fixShd word  (decNisba ! s ! c) ;
         lemma + "ِي"  => fixShd lemma (dec2sg ! s ! c) ;
         _ + ("ا"|"ى") => fixShd word  (dec3sg ! s ! c) ;
         lemma + "ة"   => case s of {
@@ -1046,6 +1047,7 @@ patHollowImp : (_,_ :Str) -> Gender => Number => Str =\xaf,xAf ->
         _           => "ِي"
       };
 
+
     --declension 3 (ending in alif)
     dec3sg : State => Case => Str = \\s,c =>
       case <s,c> of {
@@ -1054,6 +1056,15 @@ patHollowImp : (_,_ :Str) -> Gender => Number => Str =\xaf,xAf ->
         _            => []
       };
 
+    --declension 2 (ends in yaa')
+    decNisba : State => Case => Str = \\s,c =>
+      case <s,c> of {
+        <_,   Bare> => [] ;
+        <Indef,Acc> => "اً" ;
+        <Indef>     => "ٍ" ;
+        <_,    Acc> => "َ" ;
+        _           => []
+      };
 
     --dual suffixes
     dl : State => Case => Str =