From 511bfe41079053c8cc3b2d91a5345a0ac9334a0edea60143ac7e9a95a6a68f54 Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Sun, 15 Dec 2024 11:32:21 +0300
Subject: [PATCH] Add invalid item type for zeroed memory

---
 cyac/lib/dec.h            |  6 ++++--
 gyac/types/type.go        |  3 ++-
 gyac/types/type_string.go | 35 ++++++++++++++++++-----------------
 3 files changed, 24 insertions(+), 20 deletions(-)

diff --git a/cyac/lib/dec.h b/cyac/lib/dec.h
index c582ac7..190459a 100644
--- a/cyac/lib/dec.h
+++ b/cyac/lib/dec.h
@@ -10,6 +10,7 @@
 // @deftp {Data type} {enum YACItemType}
 // High-level type of the atom.
 // @itemize
+// @item YACItemInvalid -- invalid item value, uninitialised
 // @item YACItemEOC
 // @item YACItemNIL
 // @item YACItemFalse
@@ -28,8 +29,9 @@
 // @end itemize
 // @end deftp
 enum YACItemType {
-    YACItemEOC = 0,
-    YACItemNIL = 1,
+    YACItemInvalid = 0,
+    YACItemEOC = 1,
+    YACItemNIL,
     YACItemFalse,
     YACItemTrue,
     YACItemUUID,
diff --git a/gyac/types/type.go b/gyac/types/type.go
index ba0d90a..fcfea0e 100644
--- a/gyac/types/type.go
+++ b/gyac/types/type.go
@@ -4,7 +4,8 @@ type Type byte
 
 //go:generate stringer -type=Type
 const (
-	EOC Type = iota
+	Invalid Type = iota
+	EOC
 	NIL
 	Bool
 	UUID
diff --git a/gyac/types/type_string.go b/gyac/types/type_string.go
index c21de88..2cbecdf 100644
--- a/gyac/types/type_string.go
+++ b/gyac/types/type_string.go
@@ -8,26 +8,27 @@ func _() {
 	// An "invalid array index" compiler error signifies that the constant values have changed.
 	// Re-run the stringer command to generate them again.
 	var x [1]struct{}
-	_ = x[EOC-0]
-	_ = x[NIL-1]
-	_ = x[Bool-2]
-	_ = x[UUID-3]
-	_ = x[UInt-4]
-	_ = x[Int-5]
-	_ = x[BigInt-6]
-	_ = x[List-7]
-	_ = x[Map-8]
-	_ = x[Blob-9]
-	_ = x[Float-10]
-	_ = x[TAI64-11]
-	_ = x[Bin-12]
-	_ = x[Str-13]
-	_ = x[Raw-14]
+	_ = x[Invalid-0]
+	_ = x[EOC-1]
+	_ = x[NIL-2]
+	_ = x[Bool-3]
+	_ = x[UUID-4]
+	_ = x[UInt-5]
+	_ = x[Int-6]
+	_ = x[BigInt-7]
+	_ = x[List-8]
+	_ = x[Map-9]
+	_ = x[Blob-10]
+	_ = x[Float-11]
+	_ = x[TAI64-12]
+	_ = x[Bin-13]
+	_ = x[Str-14]
+	_ = x[Raw-15]
 }
 
-const _Type_name = "EOCNILBoolUUIDUIntIntBigIntListMapBlobFloatTAI64BinStrRaw"
+const _Type_name = "InvalidEOCNILBoolUUIDUIntIntBigIntListMapBlobFloatTAI64BinStrRaw"
 
-var _Type_index = [...]uint8{0, 3, 6, 10, 14, 18, 21, 27, 31, 34, 38, 43, 48, 51, 54, 57}
+var _Type_index = [...]uint8{0, 7, 10, 13, 17, 21, 25, 28, 34, 38, 41, 45, 50, 55, 58, 61, 64}
 
 func (i Type) String() string {
 	if i >= Type(len(_Type_index)-1) {
-- 
2.50.0