refactor: move TypedInt to a module

src/TypedInt.zig

@@ -0,0 +1,28 @@
+pub fn Tagged(T: type, tag: []const u8) type {
+    return enum(T) {
+        _,
+
+        pub const TAG = tag;
+
+        pub fn cborEncode(self: @This(), writer: *Writer) Writer.Error!void {
+            const value: T = @intFromEnum(self);
+            try cbor.writeValue(writer, .{ TAG, value });
+        }
+
+        pub fn cborExtract(self: *@This(), iter: *[]const u8) cbor.Error!bool {
+            var value: T = 0;
+            if (try cbor.matchValue(iter, .{ TAG, cbor.extract(&value) })) {
+                self.* = @enumFromInt(value);
+                return true;
+            }
+            return false;
+        }
+
+        pub fn format(self: @This(), writer: anytype) !void {
+            return writer.print("{s}:{d}", .{ TAG, @intFromEnum(self) });
+        }
+    };
+}
+
+const Writer = @import("std").Io.Writer;
+const cbor = @import("cbor");

src/buffer/Buffer.zig

@@ -1,6 +1,7 @@
 const std = @import("std");
 const builtin = @import("builtin");
 const cbor = @import("cbor");
+const TypedInt = @import("TypedInt");
 const file_type_config = @import("file_type_config");
 const Allocator = std.mem.Allocator;
 const ArrayList = std.ArrayList;
@@ -1755,20 +1756,4 @@ pub fn to_ref(self: *Self) Ref {
     return @enumFromInt(@intFromPtr(self));
 }
 
-pub const Ref = enum(usize) {
-    _,
-
-    pub fn cborEncode(self: @This(), writer: *std.Io.Writer) std.io.Writer.Error!void {
-        const value: usize = @intFromEnum(self);
-        try cbor.writeValue(writer, .{ "BREF", value });
-    }
-
-    pub fn cborExtract(self: *@This(), iter: *[]const u8) cbor.Error!bool {
-        var value: usize = 0;
-        if (try cbor.matchValue(iter, .{ "BREF", cbor.extract(&value) })) {
-            self.* = @enumFromInt(value);
-            return true;
-        }
-        return false;
-    }
-};
+pub const Ref = TypedInt.Tagged(usize, "BREF");