From: Alexis Laferrière <alexis.laf@xymus.net>
Date: Tue, 25 Jul 2017 15:26:50 +0000 (-0400)
Subject: json: don't reserve an id when not using it
X-Git-Url: http://nitlanguage.org

json: don't reserve an id when not using it

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>
---

diff --git a/lib/json/serialization_write.nit b/lib/json/serialization_write.nit
index eeb30ff..d591b2e 100644
--- a/lib/json/serialization_write.nit
+++ b/lib/json/serialization_write.nit
@@ -242,10 +242,10 @@ redef class Serializable
 	# which is used by all the serialization engines, not just JSON.
 	protected fun accept_json_serializer(v: JsonSerializer)
 	do
-		var id = v.cache.new_id_for(self)
 		v.stream.write "\{"
 		v.indent_level += 1
 		if not v.plain_json then
+			var id = v.cache.new_id_for(self)
 			v.new_line_and_indent
 			v.stream.write "\"__kind\": \"obj\", \"__id\": "
 			v.stream.write id.to_s