[prakriya] Fix nAmadhAtu Ric + kta

The root cause was that we were too conservative when selecting
`i_dhatu`, which led to us mistakenly excluding nAmadhAtus.

This fixes GitHub issue #178.

In addition, fix some small breakages caused by our recent `ganapatha`
updates.

vidyut-data/src/bin/create_kosha.rs

@@ -625,7 +625,7 @@ fn read_basic_avyayas(builder: &mut Builder, path: &Path) -> Result<Pratipadikas
 }
 
 fn create_sarvanamas(builder: &mut Builder) -> Entries {
-    let mut sarva_adi: Vec<&str> = vidyut_prakriya::ganapatha::SARVA_ADI
+    let mut sarva_adi: Vec<&str> = vidyut_prakriya::ganapatha::SARVADI
         .items()
         .iter()
         .filter(|x| !matches!(**x, "qatara" | "qatama" | "Batavu~"))
@@ -640,7 +640,7 @@ fn create_sarvanamas(builder: &mut Builder) -> Entries {
     let mut ret = Vec::new();
     let v = create_vyakarana();
     let lvv = sup_options();
-    for text in vidyut_prakriya::ganapatha::SARVA_ADI.items() {
+    for text in vidyut_prakriya::ganapatha::SARVADI.items() {
         let phit = Pratipadika::basic(Slp1String::from(text).expect("ascii"));
         let b = match phit {
             Pratipadika::Basic(ref b) => b,

vidyut-prakriya/src/angasya/asiddhavat.rs

@@ -800,10 +800,10 @@ fn run_for_final_i_or_u(p: &mut Prakriya, i_anga: usize) -> Option<()> {
 
 /// Runs asiddhavat rules that alter a Ri suffix.
 pub fn run_for_ni_at_index(p: &mut Prakriya, i_ni: usize) -> Option<()> {
+    p.debug("asiddhavat::run_for_ni_at_index");
     let _ = p.get_if(i_ni, |t| t.is_ni_pratyaya())?;
 
-    // Find the mula dhatu. Avoid checking for `pratyaya` so we keep nAmadhAtus.
-    let i_dhatu = p.find_prev_where(i_ni, |t| t.is_dhatu() && !t.is_empty())?;
+    let i_dhatu = p.find_prev_where(i_ni, |t| !t.is_empty() && !t.is_agama())?;
     let dhatu = p.get(i_dhatu)?;
     let n = p.pratyaya(i_ni + 1)?;
     let i_p = n.end();

vidyut-prakriya/src/dhatupatha.rs

@@ -14,6 +14,7 @@ pub struct Entry {
     artha: String,
 }
 
+/// A quick code -> `Gana` parser for numeric codes in dhatupatha.tsv
 fn numeric_to_gana(s: &str) -> Result<Gana> {
     let ret = match s {
         "1" => Gana::Bhvadi,

vidyut-prakriya/src/ganapatha.rs

@@ -102,7 +102,7 @@ impl GanapathaEntry {
 /// *sarvādi-gaṇa* (1), first used in the following *sūtra*:
 ///
 /// > 1.1.27 *sarvādīni sarvanāmāni*
-pub(crate) const SARVADI: GanapathaEntry = GanapathaEntry::basic(
+pub const SARVADI: GanapathaEntry = GanapathaEntry::basic(
     "sarvAdiH",
     1,
     "1.1.27",
@@ -1753,8 +1753,8 @@ pub(crate) const BHIDADI: GanapathaEntry = GanapathaEntry::basic(
         // <<BidA vidAraRe>>
         // <<CidA dveDIkaraRe>>
         "vidA", "kzipA", // <<guhA giryozaDyoH>>
-        "SradDA", "meDA", "goDA", // <<ArA SastryAm>>
-        "hArA", // <<kArA banDane>>
+        "SradDA", "meDA", "goDA",  // <<ArA SastryAm>>
+        "hArA",  // <<kArA banDane>>
         "kziyA", // <<tArA jyotizi>>
         // <<DArA prapAtane>>
         "reKA", "cUqA", "pIqA", "vapA", "vasA", "sfjA", // <<krapeH saMprasAraRaM ca>>

vidyut-prakriya/tests/integration/regressions.rs

@@ -8,7 +8,7 @@ use vidyut_prakriya::args::Gana::*;
 use vidyut_prakriya::args::Krdanta;
 use vidyut_prakriya::args::Lakara::*;
 use vidyut_prakriya::args::Linga::*;
-use vidyut_prakriya::args::{BaseKrt as Krt, Dhatu, Lakara, Prayoga, Taddhita};
+use vidyut_prakriya::args::{BaseKrt as Krt, Dhatu, Lakara, Prayoga, Sanadi, Taddhita};
 use vidyut_prakriya::Vyakarana;
 
 #[test]
@@ -321,3 +321,11 @@ fn anancanas() {
 fn prabhinnavish() {
     assert_has_sup_1p("praBinnaviz", Pum, &["praBinnavizaH"]);
 }
+
+// Fixes bug with "nizWAyAM seti" for nAma-dhATus
+#[test]
+fn spastitah() {
+    let spastaya = Dhatu::nama(phit("spazwa"), Some(Sanadi::Ric));
+    let spastita = krdanta(&[], &spastaya, Krt::kta);
+    assert_has_sup_1s(spastita, Pum, &["spazwitaH"]);
+}