From 984aae25535830073d41a3e0ac6324ae0ff7d8a4 Mon Sep 17 00:00:00 2001
From: milarin <milaring@proton.me>
Date: Sat, 25 Mar 2023 11:12:36 +0100
Subject: [PATCH] Result implemented

---
 result.go | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 result.go

diff --git a/result.go b/result.go
new file mode 100644
index 0000000..87d4feb
--- /dev/null
+++ b/result.go
@@ -0,0 +1,50 @@
+package channel
+
+type Result[T any] struct {
+	value *T
+	err   error
+}
+
+func ResultOf[T any](value T, err error) Result[T] {
+	if err != nil {
+		return Result[T]{value: nil, err: err}
+	}
+
+	return Result[T]{value: &value, err: nil}
+}
+
+func WrapMapFunc[I, O any](f func(I) (O, error)) func(I) Result[O] {
+	return func(i I) Result[O] { return ResultOf(f(i)) }
+}
+
+func WrapMapResultFunc[I, O any](f func(I) (O, error)) func(Result[I]) Result[O] {
+	resFunc := WrapMapFunc(f)
+	nilValue := *new(O)
+	return func(r Result[I]) Result[O] {
+		v, err := r.Get()
+		if err != nil {
+			return ResultOf(nilValue, err)
+		}
+		return resFunc(v)
+	}
+}
+
+func (r Result[T]) Success() bool {
+	return r.err == nil
+}
+
+func (r Result[T]) Fail() bool {
+	return !r.Success()
+}
+
+func (r Result[T]) GetOrDefault(defaultValue T) T {
+	if r.Fail() {
+		return defaultValue
+	}
+
+	return *r.value
+}
+
+func (r Result[T]) Get() (T, error) {
+	return *r.value, r.err
+}