Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

reflect: implement Set(nil), SetValue(nil) for PtrValue and MapValue

Browse source 
R=r
CC=golang-dev
https://golang.org/cl/823048
This commit is contained in:
Russ Cox 2010-04-20 17:02:08 -07:00
parent 73374c93a6
commit 7295b61cdb
2 changed files with 48 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

24
src/pkg/reflect/value.go
View file

@ -1038,12 +1038,22 @@ func (v *MapValue) Set(x *MapValue) {
if !v.canSet {
panic(cannotSet)
}
if x == nil {
*(**uintptr)(v.addr) = nil
return
}
typesMustMatch(v.typ, x.typ)
*(*uintptr)(v.addr) = *(*uintptr)(x.addr)
}
// Set sets v to the value x.
func (v *MapValue) SetValue(x Value) { v.Set(x.(*MapValue)) }
func (v *MapValue) SetValue(x Value) {
if x == nil {
v.Set(nil)
return
}
v.Set(x.(*MapValue))
}
// Get returns the uintptr value of v.
// It is mainly useful for printing.
@ -1146,6 +1156,10 @@ func (v *PtrValue) Get() uintptr { return *(*uintptr)(v.addr) }
// Set assigns x to v.
// The new value x must have the same type as v.
func (v *PtrValue) Set(x *PtrValue) {
if x == nil {
*(**uintptr)(v.addr) = nil
return
}
if !v.canSet {
panic(cannotSet)
}
@ -1156,7 +1170,13 @@ func (v *PtrValue) Set(x *PtrValue) {
}
// Set sets v to the value x.
func (v *PtrValue) SetValue(x Value) { v.Set(x.(*PtrValue)) }
func (v *PtrValue) SetValue(x Value) {
if x == nil {
v.Set(nil)
return
}
v.Set(x.(*PtrValue))
}
// PointTo changes v to point to x.
func (v *PtrValue) PointTo(x Value) {