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reflect: fix key type logic for maps

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This commit is contained in:
Damian Gryski
2023-03-22 18:27:07 -07:00
committed by Ron Evans
parent 9c0bf8bd2c
commit 7201b13085
1 changed files with 8 additions and 4 deletions
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src/reflect/value.go
+8 -4
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@@ -810,8 +810,10 @@ func (v Value) MapIndex(key Value) Value {
panic(&ValueError{Method: "MapIndex", Kind: v.Kind()})
}
vkey := v.typecode.key()
// compare key type with actual key type of map
if key.typecode != v.typecode.key() {
if !key.typecode.AssignableTo(vkey) {
// type error?
panic("reflect.Value.MapIndex: incompatible types for key")
}
@@ -819,12 +821,12 @@ func (v Value) MapIndex(key Value) Value {
elemType := v.typecode.Elem()
elem := New(elemType)
if key.Kind() == String {
if vkey.Kind() == String {
if ok := hashmapStringGet(v.pointer(), *(*string)(key.value), elem.value, elemType.Size()); !ok {
return Value{}
}
return elem.Elem()
} else if key.typecode.isBinary() {
} else if vkey.isBinary() {
var keyptr unsafe.Pointer
if key.isIndirect() || key.typecode.Size() > unsafe.Sizeof(uintptr(0)) {
keyptr = key.value
@@ -1367,8 +1369,10 @@ func (v Value) SetMapIndex(key, elem Value) {
panic(&ValueError{Method: "SetMapIndex", Kind: v.Kind()})
}
vkey := v.typecode.key()
// compare key type with actual key type of map
if key.typecode != v.typecode.key() {
if !key.typecode.AssignableTo(vkey) {
panic("reflect.Value.SetMapIndex: incompatible types for key")
}