Use any alias instead of interface{} (#276)

See golang/go#33232.

2 files changed, 8 insertions, 1 deletions

diff --git a/cmp/internal/value/name.go b/cmp/internal/value/name.go
index b6c12ce..7b498bb 100644
--- a/cmp/internal/value/name.go
+++ b/cmp/internal/value/name.go
@@ -9,6 +9,8 @@ import (
 	"strconv"
 )
 
+var anyType = reflect.TypeOf((*interface{})(nil)).Elem()
+
 // TypeString is nearly identical to reflect.Type.String,
 // but has an additional option to specify that full type names be used.
 func TypeString(t reflect.Type, qualified bool) string {
@@ -20,6 +22,11 @@ func appendTypeName(b []byte, t reflect.Type, qualified, elideFunc bool) []byte
 	// of the same name and within the same package,
 	// but declared within the namespace of different functions.
 
+	// Use the "any" alias instead of "interface{}" for better readability.
+	if t == anyType {
+		return append(b, "any"...)
+	}
+
 	// Named type.
 	if t.Name() != "" {
 		if qualified && t.PkgPath() != "" {
diff --git a/cmp/internal/value/name_test.go b/cmp/internal/value/name_test.go
index 3eec91c..c177e72 100644
--- a/cmp/internal/value/name_test.go
+++ b/cmp/internal/value/name_test.go
@@ -111,7 +111,7 @@ func TestTypeString(t *testing.T) {
 		want: "*$PackagePath.Named",
 	}, {
 		in:   (*interface{})(nil),
-		want: "*interface{}",
+		want: "*any",
 	}, {
 		in:   (*interface{ Read([]byte) (int, error) })(nil),
 		want: "*interface{ Read([]uint8) (int, error) }",