From: Robert Griesemer <gri@golang.org>
Date: Fri, 21 Sep 2012 19:53:59 +0000 (+1000)
Subject: [release-branch.go1] reflect: reflect.Zero results are neither addressable nor settable
X-Git-Tag: go1.0.3~169
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=40b5d5481a6dc3e877487923dcf9d81515ebb072;p=gostls13.git

[release-branch.go1] reflect: reflect.Zero results are neither addressable nor settable

««« backport 21130d62eeb0
reflect: reflect.Zero results are neither addressable nor settable

This could be deduced from "The Laws of Reflection" but it seems
worthwhile highlighting it.

R=r
CC=golang-dev
https://golang.org/cl/6350073

»»»
---

diff --git a/src/pkg/reflect/value.go b/src/pkg/reflect/value.go
index 79476ad229..c44d408c6b 100644
--- a/src/pkg/reflect/value.go
+++ b/src/pkg/reflect/value.go
@@ -1713,10 +1713,11 @@ func ValueOf(i interface{}) Value {
 	return Value{typ, unsafe.Pointer(eface.word), fl}
 }
 
-// Zero returns a Value representing a zero value for the specified type.
+// Zero returns a Value representing the zero value for the specified type.
 // The result is different from the zero value of the Value struct,
 // which represents no value at all.
 // For example, Zero(TypeOf(42)) returns a Value with Kind Int and value 0.
+// The returned value is neither addressable nor settable.
 func Zero(typ Type) Value {
 	if typ == nil {
 		panic("reflect: Zero(nil)")