Start implementing Uni type and its subclasses.

src/core/Uni.pm

@@ -0,0 +1,76 @@
+my class NFC is repr('VMArray') is array_type(uint32) { ... }
+my class NFD is repr('VMArray') is array_type(uint32) { ... }
+my class NFKC is repr('VMArray') is array_type(uint32) { ... }
+my class NFKD is repr('VMArray') is array_type(uint32) { ... }
+
+my class Uni does Positional[uint32] does Stringy is repr('VMArray') is array_type(uint32) {
+    method new(*@codes) {
+        my $uni := nqp::create(self);
+        my int $n = @codes.elems;
+        loop (my int $i = 0; $i < $n; $i++) {
+            nqp::bindpos_i($uni, $i, @codes.AT-POS($i));
+        }
+        $uni
+    }
+
+    method list() {
+        gather {
+            my int $n = nqp::elems(self);
+            loop (my int $i = 0; $i < $n; $i++) {
+                take nqp::atpos_i(self, $i);
+            }
+        }
+    }
+
+    method Uni() {
+        self
+    }
+
+    method NFC() {
+        nqp::normalizecodes(self, nqp::const::NORMALIZE_NFC, nqp::create(NFC))
+    }
+
+    method NFD() {
+        nqp::normalizecodes(self, nqp::const::NORMALIZE_NFD, nqp::create(NFD))
+    }
+
+    method NFKC() {
+        nqp::normalizecodes(self, nqp::const::NORMALIZE_NFKC, nqp::create(NFKC))
+    }
+
+    method NFKD() {
+        nqp::normalizecodes(self, nqp::const::NORMALIZE_NFKD, nqp::create(NFKD))
+    }
+}
+
+my class NFD is Uni {
+    method new(|) {
+        die "Cannot create an NFD directly"; # XXX typed, better message
+    }
+
+    method NFD() { self }
+}
+
+my class NFC is Uni {
+    method new(|) {
+        die "Cannot create an NFD directly"; # XXX typed, better message
+    }
+
+    method NFC() { self }
+}
+
+my class NFKD is Uni {
+    method new(|) {
+        die "Cannot create an NFD directly"; # XXX typed, better message
+    }
+
+    method NFKD() { self }
+}
+
+my class NFKC is Uni {
+    method NFKC() { self }
+
+    method new(|) {
+        die "Cannot create an NFD directly"; # XXX typed, better message
+    }
+}

tools/build/moar_core_sources

@@ -35,6 +35,7 @@ src/core/Order.pm
 src/core/UInt64.pm
 src/core/Num.pm
 src/core/Buf.pm
+src/core/Uni.pm
 src/core/Str.pm
 src/core/Capture.pm
 src/core/Parcel.pm