From 6c30280ad66a997b8e35f507cb340dee69a225b7 Mon Sep 17 00:00:00 2001
From: Joe Tsai <joetsai@digital-static.net>
Date: Fri, 23 Aug 2019 11:41:52 -0700
Subject: [PATCH] reflect/protoreflect: emit valid Go from GoString

Rather than using the <unknown:%d> syntax for GoString,
emit something similar to TypeName(%d),
which is functionally equivalent to casting the integer
to the specified type.

Change-Id: Ibf4bd680d1672fcaba9022fb6bd03bbfe249b8b7
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/191580
Reviewed-by: Herbie Ong <herbie@google.com>
---
 reflect/protoreflect/proto.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/reflect/protoreflect/proto.go b/reflect/protoreflect/proto.go
index ed7e74d5..7152a4aa 100644
--- a/reflect/protoreflect/proto.go
+++ b/reflect/protoreflect/proto.go
@@ -150,7 +150,7 @@ func (s Syntax) GoString() string {
 	case Proto3:
 		return "Proto3"
 	default:
-		return fmt.Sprintf("<unknown:%d>", s)
+		return fmt.Sprintf("Syntax(%d)", s)
 	}
 }
 
@@ -200,7 +200,7 @@ func (c Cardinality) GoString() string {
 	case Repeated:
 		return "Repeated"
 	default:
-		return fmt.Sprintf("<unknown:%d>", c)
+		return fmt.Sprintf("Cardinality(%d)", c)
 	}
 }
 
@@ -330,7 +330,7 @@ func (k Kind) GoString() string {
 	case GroupKind:
 		return "GroupKind"
 	default:
-		return fmt.Sprintf("<unknown:%d>", k)
+		return fmt.Sprintf("Kind(%d)", k)
 	}
 }