cmd/api: normalize byte to uint8 and rune to int32

R=golang-dev, adg, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/7195049

src/cmd/api/goapi.go

@@ -1140,10 +1140,21 @@ func (w *Walker) namelessField(f *ast.Field) *ast.Field {
 	}
 }
 
+var (
+	byteRx = regexp.MustCompile(`\bbyte\b`)
+	runeRx = regexp.MustCompile(`\brune\b`)
+)
+
 func (w *Walker) emitFeature(feature string) {
 	if !w.wantedPkg[w.curPackageName] {
 		return
 	}
+	if strings.Contains(feature, "byte") {
+		feature = byteRx.ReplaceAllString(feature, "uint8")
+	}
+	if strings.Contains(feature, "rune") {
+		feature = runeRx.ReplaceAllString(feature, "int32")
+	}
 	f := strings.Join(w.scope, ", ") + ", " + feature
 	if _, dup := w.features[f]; dup {
 		panic("duplicate feature inserted: " + f)
@@ -1159,6 +1170,7 @@ func (w *Walker) emitFeature(feature string) {
 		}
 		panic("feature contains newlines: " + f)
 	}
+
 	w.features[f] = true
 	if *verbose {
 		log.Printf("feature: %s", f)

src/cmd/api/testdata/src/pkg/p1/golden.txt

@@ -28,6 +28,9 @@ pkg p1, method (TPtrExported) OnEmbedded()
 pkg p1, method (TPtrUnexported) OnBothTandBPtr()
 pkg p1, method (TPtrUnexported) OnBothTandBVal()
 pkg p1, type B struct
+pkg p1, type ByteStruct struct
+pkg p1, type ByteStruct struct, B uint8
+pkg p1, type ByteStruct struct, R int32
 pkg p1, type Codec struct
 pkg p1, type Codec struct, Func func(int, int) int
 pkg p1, type EmbedSelector struct
@@ -65,7 +68,9 @@ pkg p1, type T struct
 pkg p1, type TPtrExported struct
 pkg p1, type TPtrExported struct, embedded *Embedded
 pkg p1, type TPtrUnexported struct
-pkg p1, var ByteConv []byte
+pkg p1, var Byte uint8
+pkg p1, var ByteConv []uint8
+pkg p1, var ByteFunc func(uint8) int32
 pkg p1, var ChecksumError error
 pkg p1, var SIPtr *SI
 pkg p1, var SIPtr2 *SI

src/cmd/api/testdata/src/pkg/p1/p1.go

@@ -193,3 +193,11 @@ var ifaceVar interface{} = 5
 var assertVar = ifaceVar.(int)
 
 var indexVar = m["foo"]
+
+var Byte byte
+var ByteFunc func(byte) rune
+
+type ByteStruct struct {
+	B byte
+	R rune
+}

src/cmd/api/testdata/src/pkg/p3/golden.txt

-pkg p3, method (*ThirdBase) GoodPlayer() (int, int, int)
 pkg p3, func BadHop(int, int, int) (bool, bool, *ThirdBase, *ThirdBase, error)
+pkg p3, method (*ThirdBase) GoodPlayer() (int, int, int)
 pkg p3, type ThirdBase struct