From 19bf7cf99c6c8db0e260d7def9e64b99c49c07ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mat=C3=A9o?= <mateo.delerue@upfluence.com>
Date: Mon, 29 Dec 2025 13:05:27 +0100
Subject: [PATCH] pointers: add new Eq() function

---
 pointers/ptr.go      | 12 ++++++++++++
 pointers/ptr_test.go | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)

diff --git a/pointers/ptr.go b/pointers/ptr.go
index a8ed4f3..cd3830e 100644
--- a/pointers/ptr.go
+++ b/pointers/ptr.go
@@ -22,3 +22,15 @@ func NullIsZero[T comparable](v *T) T {
 
 	return *v
 }
+
+func Eq[T comparable](a, b *T) bool {
+	if a == b {
+		return true
+	}
+
+	if a == nil || b == nil {
+		return false
+	}
+
+	return *a == *b
+}
diff --git a/pointers/ptr_test.go b/pointers/ptr_test.go
index e25898e..aab8726 100644
--- a/pointers/ptr_test.go
+++ b/pointers/ptr_test.go
@@ -34,3 +34,40 @@ func TestNullIsZero(t *testing.T) {
 	assert.Equal(t, "s", NullIsZero(Ptr("s")))
 	assert.Equal(t, "", NullIsZero(s))
 }
+
+type testStruct struct {
+	number int
+	string string
+}
+
+func TestEq(t *testing.T) {
+	n := 5
+	assert.True(t, Eq(&n, &n))
+	assert.True(t, Eq(Ptr(5), &n))
+	assert.True(t, Eq(Ptr(5), Ptr(5)))
+	assert.False(t, Eq(&n, Ptr(6)))
+	assert.False(t, Eq(Ptr(5), Ptr(6)))
+
+	str := "foo"
+	assert.True(t, Eq(&str, &str))
+	assert.True(t, Eq(&str, Ptr("foo")))
+	assert.False(t, Eq(&str, Ptr("bar")))
+
+	s := testStruct{
+		number: 1,
+		string: "hello",
+	}
+	assert.True(t, Eq(&s, &s))
+	assert.True(t, Eq(&s, &testStruct{
+		number: 1,
+		string: "hello",
+	}))
+	assert.False(t, Eq(&s, &testStruct{
+		number: 2,
+		string: "hello",
+	}))
+	assert.False(t, Eq(&s, &testStruct{
+		number: 1,
+		string: "world",
+	}))
+}