From a66fe300cdc2269aebdfb08745d0f1205254f07c Mon Sep 17 00:00:00 2001
From: NoahLan <6995syu@163.com>
Date: Wed, 23 Aug 2023 10:45:08 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E6=B7=BB=E5=8A=A0=E8=8E=B7=E5=8F=96ref?=
 =?UTF-8?q?lect.Value=E5=AE=9E=E9=99=85=E6=8C=87=E5=90=91=E7=9A=84?=
 =?UTF-8?q?=E5=8F=8D=E5=B0=84=E5=AF=B9=E8=B1=A1=E7=9A=84=E6=96=B9=E6=B3=95?=
 =?UTF-8?q?=EF=BC=8C=E5=B9=B6=E8=87=AA=E5=8A=A8=E6=96=B0=E5=BB=BA=E5=AF=B9?=
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---
 nreflect/util.go | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/nreflect/util.go b/nreflect/util.go
index f26dd0d..ab9cfdb 100644
--- a/nreflect/util.go
+++ b/nreflect/util.go
@@ -28,6 +28,50 @@ func Indirect(v reflect.Value) reflect.Value {
 	return v
 }
 
+// IndirectAddr walks down v allocating pointers as needed,
+// until it gets to a non-pointer.
+func IndirectAddr(v reflect.Value) reflect.Value {
+	v0 := v
+	haveAddr := false
+
+	// 如果v是命名类型并且可寻址(非指针)
+	if v.Kind() != reflect.Ptr && v.Type().Name() != "" && v.CanAddr() {
+		haveAddr = true
+		v = v.Addr()
+	}
+	for {
+		// 从接口加载值，但前提是结果可有效寻址。
+		if v.Kind() == reflect.Interface && !v.IsNil() {
+			e := v.Elem()
+			if e.Kind() == reflect.Ptr && !e.IsNil() && e.Elem().Kind() == reflect.Ptr {
+				haveAddr = false
+				v = e
+				continue
+			}
+		}
+		if v.Kind() != reflect.Ptr {
+			break
+		}
+		// 防止无限循环，v有可能是是指向其自身地址的接口:
+		// var v any
+		// v = &v
+		if v.Elem().Kind() == reflect.Interface && v.Elem().Elem() == v {
+			v = v.Elem()
+			break
+		}
+		if v.IsNil() && v.CanSet() {
+			v.Set(reflect.New(v.Type().Elem()))
+		}
+		if haveAddr {
+			v = v0 // 返回原始值，如果可寻址
+			haveAddr = false
+		} else {
+			v = v.Elem()
+		}
+	}
+	return v
+}
+
 // Len get reflect value length
 func Len(v reflect.Value) int {
 	v = reflect.Indirect(v)