From a6978a92beed1df3bcd4556c1cb71e3a9963726f Mon Sep 17 00:00:00 2001
From: Dmitry Ponomarev <demdxx@gmail.com>
Date: Mon, 29 Jan 2024 17:13:36 +0100
Subject: [PATCH] Add `PtrAsValue` function to convert a pointer to a value

---
 logic.go      | 8 ++++++++
 logic_test.go | 5 +++++
 2 files changed, 13 insertions(+)

diff --git a/logic.go b/logic.go
index 8bd862a..ef603d3 100644
--- a/logic.go
+++ b/logic.go
@@ -22,3 +22,11 @@ func IfThen[T any](cond bool, a, b T) T {
 	}
 	return b
 }
+
+// PtrAsValue returns the value of `v` if `v` is not `nil`, else def
+func PtrAsValue[T any](v *T, def T) T {
+	if v == nil {
+		return def
+	}
+	return *v
+}
diff --git a/logic_test.go b/logic_test.go
index 3ff23e6..c415176 100644
--- a/logic_test.go
+++ b/logic_test.go
@@ -34,4 +34,9 @@ func TestLogic(t *testing.T) {
 		assert.Equal(t, 1, IfThen(true, 1, 2))
 		assert.Equal(t, 2, IfThen(false, 1, 2))
 	})
+
+	t.Run("PtrAsValue", func(t *testing.T) {
+		assert.Equal(t, 1, PtrAsValue(&[]int{1}[0], 2))
+		assert.Equal(t, 2, PtrAsValue((*int)(nil), 2))
+	})
 }