From 0b62ea83df79ffb761cd319419519c7749febb94 Mon Sep 17 00:00:00 2001
From: Alexander Wang <alex@terrastruct.com>
Date: Thu, 18 Jul 2024 13:11:43 -0600
Subject: [PATCH] fix format

---
 d2format/format.go      |  3 +++
 d2format/format_test.go | 24 ++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/d2format/format.go b/d2format/format.go
index dc7430ec2..dd1a42996 100644
--- a/d2format/format.go
+++ b/d2format/format.go
@@ -358,6 +358,9 @@ func (p *printer) _map(m *d2ast.Map) {
 func (p *printer) mapKey(mk *d2ast.Key) {
 	if mk.Ampersand {
 		p.sb.WriteByte('&')
+	} else if mk.NotAmpersand {
+		p.sb.WriteByte('!')
+		p.sb.WriteByte('&')
 	}
 	if mk.Key != nil {
 		p.key(mk.Key)
diff --git a/d2format/format_test.go b/d2format/format_test.go
index c6dd79296..369361f2c 100644
--- a/d2format/format_test.go
+++ b/d2format/format_test.go
@@ -829,6 +829,30 @@ mybox: {
 mybox: {
   label: prefix${test}suffix
 }
+`,
+		},
+		{
+			name: "not-filter",
+			in: `jacob: {
+	shape: circle
+}
+jeremy: {
+	shape: rectangle
+}
+*: {
+	!&shape: rectangle
+	label: I'm not a rectangle
+}`,
+			exp: `jacob: {
+  shape: circle
+}
+jeremy: {
+  shape: rectangle
+}
+*: {
+  !&shape: rectangle
+  label: I'm not a rectangle
+}
 `,
 		},
 	}