Ported to weekly Go release.

decode.go

diff --git a/decode.go b/decode.go
index 9db4102..3a3dee9 100644
--- a/decode.go
+++ b/decode.go
@@ -233,10 +233,10 @@
 		again = false
 		setter, _ := (*out).Interface().(Setter)
 		if tag != "!!null" || setter != nil {
-			if pv, ok := (*out).(*reflect.PtrValue); ok {
+			if pv := (*out); pv.Kind() == reflect.Ptr {
 				if pv.IsNil() {
-					*out = reflect.MakeZero(pv.Type().(*reflect.PtrType).Elem())
-					pv.PointTo(*out)
+					*out = reflect.Zero(pv.Type().Elem())
+					pv.Set((*out).Addr())
 				} else {
 					*out = pv.Elem()
 				}
@@ -246,7 +246,7 @@
 		}
 		if setter != nil {
 			var arg interface{}
-			*out = reflect.NewValue(&arg).(*reflect.PtrValue).Elem()
+			*out = reflect.NewValue(&arg).Elem()
 			return func() {
 				*good = setter.SetYAML(tag, arg)
 			}
@@ -307,55 +307,59 @@
 			defer set()
 		}
 	}
-	switch out := out.(type) {
-	case *reflect.StringValue:
-		out.Set(n.value)
+	switch out.Kind() {
+	case reflect.String:
+		out.SetString(n.value)
 		good = true
-	case *reflect.InterfaceValue:
-		out.Set(reflect.NewValue(resolved))
+	case reflect.Interface:
+		if resolved == nil {
+			out.Set(reflect.Zero(out.Type()))
+		} else {
+			out.Set(reflect.NewValue(resolved))
+		}
 		good = true
-	case *reflect.IntValue:
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		switch resolved := resolved.(type) {
 		case int:
-			if !out.Overflow(int64(resolved)) {
-				out.Set(int64(resolved))
+			if !out.OverflowInt(int64(resolved)) {
+				out.SetInt(int64(resolved))
 				good = true
 			}
 		case int64:
-			if !out.Overflow(resolved) {
-				out.Set(resolved)
+			if !out.OverflowInt(resolved) {
+				out.SetInt(resolved)
 				good = true
 			}
 		}
-	case *reflect.UintValue:
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
 		switch resolved := resolved.(type) {
 		case int:
 			if resolved >= 0 {
-				out.Set(uint64(resolved))
+				out.SetUint(uint64(resolved))
 				good = true
 			}
 		case int64:
 			if resolved >= 0 {
-				out.Set(uint64(resolved))
+				out.SetUint(uint64(resolved))
 				good = true
 			}
 		}
-	case *reflect.BoolValue:
+	case reflect.Bool:
 		switch resolved := resolved.(type) {
 		case bool:
-			out.Set(resolved)
+			out.SetBool(resolved)
 			good = true
 		}
-	case *reflect.FloatValue:
+	case reflect.Float32, reflect.Float64:
 		switch resolved := resolved.(type) {
 		case float64:
-			out.Set(resolved)
+			out.SetFloat(resolved)
 			good = true
 		}
-	case *reflect.PtrValue:
+	case reflect.Ptr:
 		switch resolved := resolved.(type) {
 		case nil:
-			out.PointTo(nil)
+			out.Set(reflect.Zero(out.Type()))
 			good = true
 		}
 	default:
@@ -368,24 +372,23 @@
 	if set := d.setter("!!seq", &out, &good); set != nil {
 		defer set()
 	}
-	if iface, ok := out.(*reflect.InterfaceValue); ok {
+	if out.Kind() == reflect.Interface {
 		// No type hints. Will have to use a generic sequence.
+		iface := out
 		out = reflect.NewValue(make([]interface{}, 0))
-		iface.SetValue(out)
+		iface.Set(out)
 	}
 
-	sv, ok := out.(*reflect.SliceValue)
-	if !ok {
+	if out.Kind() != reflect.Slice {
 		return false
 	}
-	st := sv.Type().(*reflect.SliceType)
-	et := st.Elem()
+	et := out.Type().Elem()
 
 	l := len(n.children)
 	for i := 0; i < l; i++ {
-		e := reflect.MakeZero(et)
+		e := reflect.Zero(et)
 		if ok := d.unmarshal(n.children[i], e); ok {
-			sv.SetValue(reflect.Append(sv, e))
+			out.Set(reflect.Append(out, e))
 		}
 	}
 	return true
@@ -395,50 +398,50 @@
 	if set := d.setter("!!map", &out, &good); set != nil {
 		defer set()
 	}
-	if s, ok := out.(*reflect.StructValue); ok {
-		return d.mappingStruct(n, s)
+	if out.Kind() == reflect.Struct {
+		return d.mappingStruct(n, out)
 	}
 
-	if iface, ok := out.(*reflect.InterfaceValue); ok {
+	if out.Kind() == reflect.Interface {
 		// No type hints. Will have to use a generic map.
+		iface := out
 		out = reflect.NewValue(make(map[interface{}]interface{}))
-		iface.SetValue(out)
+		iface.Set(out)
 	}
 
-	mv, ok := out.(*reflect.MapValue)
-	if !ok {
+	if out.Kind() != reflect.Map {
 		return false
 	}
-	mt := mv.Type().(*reflect.MapType)
-	kt := mt.Key()
-	et := mt.Elem()
+	outt := out.Type()
+	kt := outt.Key()
+	et := outt.Elem()
 
 	l := len(n.children)
 	for i := 0; i < l; i += 2 {
-		k := reflect.MakeZero(kt)
+		k := reflect.Zero(kt)
 		if d.unmarshal(n.children[i], k) {
-			e := reflect.MakeZero(et)
+			e := reflect.Zero(et)
 			if d.unmarshal(n.children[i+1], e) {
-				mv.SetElem(k, e)
+				out.SetMapIndex(k, e)
 			}
 		}
 	}
 	return true
 }
 
-func (d *decoder) mappingStruct(n *node, out *reflect.StructValue) (good bool) {
-	fields, err := getStructFields(out.Type().(*reflect.StructType))
+func (d *decoder) mappingStruct(n *node, out reflect.Value) (good bool) {
+	fields, err := getStructFields(out.Type())
 	if err != nil {
 		panic(err)
 	}
-	name := reflect.NewValue("").(*reflect.StringValue)
+	name := reflect.NewValue("")
 	fieldsMap := fields.Map
 	l := len(n.children)
 	for i := 0; i < l; i += 2 {
 		if !d.unmarshal(n.children[i], name) {
 			continue
 		}
-		if info, ok := fieldsMap[name.Get()]; ok {
+		if info, ok := fieldsMap[name.String()]; ok {
 			d.unmarshal(n.children[i+1], out.Field(info.Num))
 		}
 	}

decode_test.go

diff --git a/decode_test.go b/decode_test.go
index 5fdf2b4..5c80a20 100644
--- a/decode_test.go
+++ b/decode_test.go
@@ -133,19 +133,19 @@
 
 
 func (s *S) TestUnmarshal(c *C) {
-	for _, item := range unmarshalTests {
+	for i, item := range unmarshalTests {
 		t := reflect.NewValue(item.value).Type()
 		var value interface{}
-		if t, ok := t.(*reflect.MapType); ok {
+		if t.Kind() == reflect.Map {
 			value = reflect.MakeMap(t).Interface()
 		} else {
-			pt := reflect.NewValue(item.value).Type().(*reflect.PtrType)
-			pv := reflect.MakeZero(pt).(*reflect.PtrValue)
-			pv.PointTo(reflect.MakeZero(pt.Elem()))
+			pt := reflect.NewValue(item.value).Type()
+			pv := reflect.Zero(pt)
+			pv.Set(reflect.Zero(pt.Elem()).Addr())
 			value = pv.Interface()
 		}
 		err := goyaml.Unmarshal([]byte(item.data), value)
-		c.Assert(err, IsNil)
+		c.Assert(err, IsNil, Bug("Item #%d", i))
 		c.Assert(value, Equals, item.value)
 	}
 }

encode.go

diff --git a/encode.go b/encode.go
index 2eba6a5..242a722 100644
--- a/encode.go
+++ b/encode.go
@@ -92,51 +92,51 @@
 		}
 		in = reflect.NewValue(value)
 	}
-	switch in := in.(type) {
-	case *reflect.InterfaceValue:
+	switch in.Kind() {
+	case reflect.Interface:
 		if in.IsNil() {
 			e.nilv()
 		} else {
 			e.marshal(tag, in.Elem())
 		}
-	case *reflect.MapValue:
+	case reflect.Map:
 		e.mapv(tag, in)
-	case *reflect.PtrValue:
+	case reflect.Ptr:
 		if in.IsNil() {
 			e.nilv()
 		} else {
 			e.marshal(tag, in.Elem())
 		}
-	case *reflect.StructValue:
+	case reflect.Struct:
 		e.structv(tag, in)
-	case *reflect.SliceValue:
+	case reflect.Slice:
 		e.slicev(tag, in)
-	case *reflect.StringValue:
+	case reflect.String:
 		e.stringv(tag, in)
-	case *reflect.IntValue:
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		e.intv(tag, in)
-	case *reflect.UintValue:
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
 		e.uintv(tag, in)
-	case *reflect.FloatValue:
+	case reflect.Float32, reflect.Float64:
 		e.floatv(tag, in)
-	case *reflect.BoolValue:
+	case reflect.Bool:
 		e.boolv(tag, in)
 	default:
 		panic("Can't marshal type yet: " + in.Type().String())
 	}
 }
 
-func (e *encoder) mapv(tag string, in *reflect.MapValue) {
+func (e *encoder) mapv(tag string, in reflect.Value) {
 	e.mappingv(tag, func() {
-		for _, k := range in.Keys() {
+		for _, k := range in.MapKeys() {
 			e.marshal("", k)
-			e.marshal("", in.Elem(k))
+			e.marshal("", in.MapIndex(k))
 		}
 	})
 }
 
-func (e *encoder) structv(tag string, in *reflect.StructValue) {
-	fields, err := getStructFields(in.Type().(*reflect.StructType))
+func (e *encoder) structv(tag string, in reflect.Value) {
+	fields, err := getStructFields(in.Type())
 	if err != nil {
 		panic(err)
 	}
@@ -175,7 +175,7 @@
 	e.emit()
 }
 
-func (e *encoder) slicev(tag string, in *reflect.SliceValue) {
+func (e *encoder) slicev(tag string, in reflect.Value) {
 	var ctag *C.yaml_char_t
 	var free func()
 	var cimplicit C.int
@@ -197,15 +197,15 @@
 	e.emit()
 	n := in.Len()
 	for i := 0; i < n; i++ {
-		e.marshal("", in.Elem(i))
+		e.marshal("", in.Index(i))
 	}
 	C.yaml_sequence_end_event_initialize(&e.event)
 	e.emit()
 }
 
-func (e *encoder) stringv(tag string, in *reflect.StringValue) {
+func (e *encoder) stringv(tag string, in reflect.Value) {
 	var style C.yaml_scalar_style_t
-	s := in.Get()
+	s := in.String()
 	if rtag, _ := resolve("", s); rtag != "!!str" {
 		style = C.YAML_DOUBLE_QUOTED_SCALAR_STYLE
 	} else {
@@ -214,9 +214,9 @@
 	e.emitScalar(s, "", tag, style)
 }
 
-func (e *encoder) boolv(tag string, in *reflect.BoolValue) {
+func (e *encoder) boolv(tag string, in reflect.Value) {
 	var s string
-	if in.Get() {
+	if in.Bool() {
 		s = "true"
 	} else {
 		s = "false"
@@ -224,19 +224,19 @@
 	e.emitScalar(s, "", tag, C.YAML_PLAIN_SCALAR_STYLE)
 }
 
-func (e *encoder) intv(tag string, in *reflect.IntValue) {
-	s := strconv.Itoa64(in.Get())
+func (e *encoder) intv(tag string, in reflect.Value) {
+	s := strconv.Itoa64(in.Int())
 	e.emitScalar(s, "", tag, C.YAML_PLAIN_SCALAR_STYLE)
 }
 
-func (e *encoder) uintv(tag string, in *reflect.UintValue) {
-	s := strconv.Uitoa64(in.Get())
+func (e *encoder) uintv(tag string, in reflect.Value) {
+	s := strconv.Uitoa64(in.Uint())
 	e.emitScalar(s, "", tag, C.YAML_PLAIN_SCALAR_STYLE)
 }
 
-func (e *encoder) floatv(tag string, in *reflect.FloatValue) {
+func (e *encoder) floatv(tag string, in reflect.Value) {
 	// FIXME: Handle 64 bits here.
-	s := strconv.Ftoa32(float32(in.Get()), 'g', -1)
+	s := strconv.Ftoa32(float32(in.Float()), 'g', -1)
 	switch s {
 	case "+Inf":
 		s = ".inf"

goyaml.go

diff --git a/goyaml.go b/goyaml.go
index 58a9a05..6d69268 100644
--- a/goyaml.go
+++ b/goyaml.go
@@ -21,6 +21,8 @@
 	if r := recover(); r != nil {
 		if _, ok := r.(runtime.Error); ok {
 			panic(r)
+		} else if _, ok := r.(*reflect.ValueError); ok {
+			panic(r)
 		} else if s, ok := r.(string); ok {
 			*err = os.ErrorString("YAML error: " + s)
 		} else if e, ok := r.(os.Error); ok {
@@ -144,7 +146,7 @@
 var fieldMap = make(map[string]*structFields)
 var fieldMapMutex sync.RWMutex
 
-func getStructFields(st *reflect.StructType) (*structFields, os.Error) {
+func getStructFields(st reflect.Type) (*structFields, os.Error) {
 	path := st.PkgPath()
 	name := st.Name()
 
@@ -208,21 +210,21 @@
 }
 
 func isZero(v reflect.Value) bool {
-	switch v := v.(type) {
-	case *reflect.StringValue:
-		return len(v.Get()) == 0
-	case *reflect.InterfaceValue:
+	switch v.Kind() {
+	case reflect.String:
+		return len(v.String()) == 0
+	case reflect.Interface:
 		return v.IsNil()
-	case *reflect.SliceValue:
+	case reflect.Slice:
 		return v.Len() == 0
-	case *reflect.MapValue:
+	case reflect.Map:
 		return v.Len() == 0
-	case *reflect.IntValue:
-		return v.Get() == 0
-	case *reflect.UintValue:
-		return v.Get() == 0
-	case *reflect.BoolValue:
-		return !v.Get()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Bool:
+		return !v.Bool()
 	}
 	return false
 }