From 6d6e33d3c71f942b218cf3e48a5707d59863a15a Mon Sep 17 00:00:00 2001
From: qydysky <32743305+qydysky@users.noreply.github.com>
Date: Mon, 28 Nov 2022 21:22:23 +0800
Subject: [PATCH] errors

---
 errors/errors.go      | 40 ++++++++++++++++++++++++++++++++++++++++
 errors/errors_test.go | 27 +++++++++++++++++++++++++++
 2 files changed, 67 insertions(+)
 create mode 100644 errors/errors.go
 create mode 100644 errors/errors_test.go

diff --git a/errors/errors.go b/errors/errors.go
new file mode 100644
index 0000000..86045de
--- /dev/null
+++ b/errors/errors.go
@@ -0,0 +1,40 @@
+package errors
+
+type Error struct {
+	son    interface{}
+	reason string
+	action string
+}
+
+func (t Error) Error() string {
+	return t.reason
+}
+
+func Catch(e error, action string) bool {
+	if v, ok := e.(Error); ok {
+		if v.action == action {
+			return true
+		} else if v.son != nil {
+			return Catch((v.son).(Error), action)
+		}
+	}
+	return false
+}
+
+func Grow(e error, son Error) Error {
+	if v, ok := e.(Error); ok {
+		son.son = v
+	} else {
+		son.son = Error{
+			reason: v.Error(),
+		}
+	}
+	return son
+}
+
+func New(reason string, action string) Error {
+	return Error{
+		reason: reason,
+		action: action,
+	}
+}
diff --git a/errors/errors_test.go b/errors/errors_test.go
new file mode 100644
index 0000000..885baa4
--- /dev/null
+++ b/errors/errors_test.go
@@ -0,0 +1,27 @@
+package errors
+
+import "testing"
+
+func TestXxx(t *testing.T) {
+	var err error
+
+	err = New("r0", "a0")
+
+	if !Catch(err, "a0") {
+		t.Fail()
+	}
+
+	if Catch(err, "a1") {
+		t.Fail()
+	}
+
+	err = Grow(err, New("r1", "a1"))
+
+	if !Catch(err, "a0") {
+		t.Fail()
+	}
+
+	if !Catch(err, "a1") {
+		t.Fail()
+	}
+}
-- 
2.39.2