Start moving altnfas into the code object.

Author: jnthn

src/NQP/Actions.pm

@@ -1640,4 +1640,12 @@ class NQP::RegexActions is QRegex::P6Regex::Actions {
     method store_regex_caps($code_obj, $block, %caps) {
         $code_obj.SET_CAPS(%caps);
     }
+    
+    method store_regex_alt_nfa($code_obj, $block, $key, @alternatives) {
+        my @saved;
+        for @alternatives {
+            @saved.push($_.save(:non_empty));
+        }
+        $code_obj.SET_ALT_NFA($key, @saved);
+    }
 }

src/QRegex/Cursor.nqp

@@ -249,7 +249,9 @@ role NQPCursorRole is export {
         my @fates := $nfa.states[0];
         my int $start := 1;
         my int $fate := 0;
-        for $!regexsub.nqpattr($name) {
+        for nqp::ifnull(
+                nqp::can($!regexsub, 'ALT_NFA') ?? $!regexsub.ALT_NFA($name) !! nqp::null(),
+                $!regexsub.nqpattr($name)) {
             my $label := @labels[$fate];
             $fate := $fate + 1;
             @fates[$fate] := $label;

src/core/NQPRoutine.pm

@@ -87,8 +87,8 @@ my knowhow NQPRegex {
     method NFA() {
         $!nfa
     }
-    method ALT_NFA($name) {
-        %!alt_nfas{$name}
+    method ALT_NFA(str $name) {
+        nqp::isnull(%!alt_nfas) ?? nqp::null() !! %!alt_nfas{$name}
     }
 }
 pir::stable_publish_vtable_handler_mapping__vPP(NQPRegex,