bug177: anonymous struct fields in reflect

(reported by iant)

R=r
DELTA=50  (32 added, 12 deleted, 6 changed)
OCL=32263
CL=32385

src/cmd/gc/reflect.c

@@ -627,7 +627,7 @@ ok:
 		ot = duint32(s, ot, n);
 		for(t1=t->type; t1!=T; t1=t1->down) {
 			// ../../pkg/runtime/type.go:/structField
-			if(t1->sym) {
+			if(t1->sym && !t1->embedded) {
 				ot = dgostringptr(s, ot, t1->sym->name);
 				if(exportname(t1->sym->name))
 					ot = dgostringptr(s, ot, nil);

src/pkg/gob/decode.go

@@ -666,7 +666,7 @@ func compileDec(wireId typeId, rt reflect.Type) (engine *decEngine, err os.Error
 		localField, present := srt.FieldByName(wireField.name);
 		ovfl := overflow(wireField.name);
 		// TODO(r): anonymous names
-		if !present || localField.Anonymous {
+		if !present {
 			op, err := decIgnoreOpFor(wireField.id);
 			if err != nil {
 				return nil, err

src/pkg/reflect/type.go

@@ -477,7 +477,11 @@ func (t *StructType) Field(i int) (f StructField) {
 	if p.name != nil {
 		f.Name = *p.name;
 	} else {
-		f.Name = f.Type.Name();
+		t := f.Type;
+		if pt, ok := t.(*PtrType); ok {
+			t = pt.Elem();
+		}
+		f.Name = t.Name();
 		f.Anonymous = true;
 	}
 	if p.pkgPath != nil {
@@ -487,28 +491,20 @@ func (t *StructType) Field(i int) (f StructField) {
 		f.Tag = *p.tag;
 	}
 	f.Offset = p.offset;
+	f.Index = i;
 	return;
 }
 
 // FieldByName returns the field with the provided name and a boolean to indicate
-// that the field was found..
+// that the field was found.
 func (t *StructType) FieldByName(name string) (f StructField, present bool) {
 	for i, p := range t.fields {
-		if p.name == nil || *p.name != name {
-			continue;
-		}
-		f.Name = *p.name;
-		f.Type = toType(*p.typ);
-		if p.pkgPath != nil {
-			f.PkgPath = *p.pkgPath;
-		}
-		if p.tag != nil {
-			f.Tag = *p.tag;
+		ff := t.Field(i);
+		if ff.Name == name {
+			f = ff;
+			present = true;
+			break;
 		}
-		f.Offset = p.offset;
-		f.Index = i;
-		present = true;
-		break;
 	}
 	return;
 }

test/fixedbugs/bug177.go

+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+import "fmt"
+import "reflect"
+type S1 struct { i int }
+type S2 struct { S1 }
+func main() {
+	typ := reflect.Typeof(S2{}).(*reflect.StructType);
+	f := typ.Field(0);
+	if f.Name != "S1" || f.Anonymous != true {
+		println("BUG: ", f.Name, f.Anonymous);
+		return;
+	}
+	f, ok := typ.FieldByName("S1");
+	if !ok {
+		println("BUG: missing S1");
+		return;
+	}
+	if !f.Anonymous {
+		println("BUG: S1 is not anonymous");
+		return;
+	}
+}