feat(interpreter): nameref resolution for associative array operations (#821)

Resolve namerefs in ${!ref[@]}, ${#ref[@]}, and ref+=() array operations.\n\nCloses #801

Author: chaliy

crates/bashkit/src/interpreter/mod.rs

@@ -3168,7 +3168,9 @@ impl Interpreter {
                         expanded_values.push((value, has_command_subst));
                     }
 
-                    let arr = self.arrays.entry(assignment.name.clone()).or_default();
+                    // Resolve nameref for array assignments
+                    let arr_name = self.resolve_nameref(&assignment.name).to_string();
+                    let arr = self.arrays.entry(arr_name).or_default();
                     let mut idx = if assignment.append {
                         arr.keys().max().map(|k| k + 1).unwrap_or(0)
                     } else {
@@ -5921,9 +5923,10 @@ impl Interpreter {
                     result.push_str(&names.join(" "));
                 }
                 WordPart::ArrayLength(name) => {
-                    if let Some(arr) = self.assoc_arrays.get(name) {
+                    let resolved = self.resolve_nameref(name);
+                    if let Some(arr) = self.assoc_arrays.get(resolved) {
                         result.push_str(&arr.len().to_string());
-                    } else if let Some(arr) = self.arrays.get(name) {
+                    } else if let Some(arr) = self.arrays.get(resolved) {
                         result.push_str(&arr.len().to_string());
                     } else {
                         result.push('0');
@@ -6028,12 +6031,13 @@ impl Interpreter {
             }
             // "${!arr[@]}" - array keys/indices as separate fields
             if let WordPart::ArrayIndices(name) = &word.parts[0] {
-                if let Some(arr) = self.assoc_arrays.get(name) {
+                let resolved = self.resolve_nameref(name);
+                if let Some(arr) = self.assoc_arrays.get(resolved) {
                     let mut keys: Vec<_> = arr.keys().cloned().collect();
                     keys.sort();
                     return Ok(keys);
                 }
-                if let Some(arr) = self.arrays.get(name) {
+                if let Some(arr) = self.arrays.get(resolved) {
                     let mut indices: Vec<_> = arr.keys().collect();
                     indices.sort();
                     return Ok(indices.iter().map(|i| i.to_string()).collect());

crates/bashkit/tests/spec_cases/bash/nameref-assoc.test.sh

@@ -0,0 +1,98 @@
+### nameref_assign_key_to_assoc
+# Nameref assign key to caller's associative array
+add_entry() {
+  local -n ref="$1"
+  ref["hello"]="world"
+  ref["foo"]="bar"
+}
+declare -A mymap
+add_entry mymap
+echo "${mymap[hello]}"
+echo "${mymap[foo]}"
+### expect
+world
+bar
+### end
+
+### nameref_iterate_assoc_keys
+# Nameref iterate keys of associative array
+show_keys() {
+  local -n ref="$1"
+  for key in "${!ref[@]}"; do
+    echo "${key}=${ref[$key]}"
+  done | sort
+}
+declare -A colors=([red]=ff0000 [green]=00ff00 [blue]=0000ff)
+show_keys colors
+### expect
+blue=0000ff
+green=00ff00
+red=ff0000
+### end
+
+### nameref_append_indexed_array
+# Nameref append to caller's indexed array
+collect() {
+  local -n arr_ref="$1"
+  arr_ref+=("alpha")
+  arr_ref+=("beta")
+  arr_ref+=("gamma")
+}
+items=()
+collect items
+echo "${#items[@]}"
+echo "${items[0]} ${items[1]} ${items[2]}"
+### expect
+3
+alpha beta gamma
+### end
+
+### nameref_two_refs_same_function
+# Two namerefs in same function (harness pattern)
+collect_from() {
+  local dir="$1"
+  local -n map_ref="$2"
+  local -n order_ref="$3"
+  map_ref["key-a"]="${dir}/file-a"
+  map_ref["key-b"]="${dir}/file-b"
+  order_ref+=("key-a")
+  order_ref+=("key-b")
+}
+declare -A my_map
+my_order=()
+collect_from "/src" my_map my_order
+echo "${my_map[key-a]}"
+echo "${my_map[key-b]}"
+echo "${my_order[0]} ${my_order[1]}"
+### expect
+/src/file-a
+/src/file-b
+key-a key-b
+### end
+
+### nameref_assoc_length
+# Nameref with associative array length
+count_entries() {
+  local -n ref="$1"
+  echo "${#ref[@]}"
+}
+declare -A data=([x]=1 [y]=2 [z]=3)
+count_entries data
+### expect
+3
+### end
+
+### nameref_overwrite_assoc_key
+# Nameref overwrite existing key in associative array
+update() {
+  local -n ref="$1"
+  ref["name"]="updated"
+}
+declare -A record=([name]=original [age]=30)
+update record
+echo "${record[name]}"
+echo "${record[age]}"
+### expect
+updated
+30
+### end