From 9968f5c97166ad40caa91283905837605b5100cb Mon Sep 17 00:00:00 2001
From: Houtan Bastani <houtan@dynare.org>
Date: Tue, 23 Oct 2018 14:00:36 +0200
Subject: [PATCH] fix bug in JSON output: JSON values that are decimals must be
 preceded by a 0

e.g. 0.5 is valid but .5 is not.
---
 src/ExprNode.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/ExprNode.cc b/src/ExprNode.cc
index 2df5e3bf..27fd7876 100644
--- a/src/ExprNode.cc
+++ b/src/ExprNode.cc
@@ -359,7 +359,11 @@ NumConstNode::writeOutput(ostream &output, ExprNodeOutputType output_type,
 void
 NumConstNode::writeJsonAST(ostream &output) const
 {
-  output << "{\"node_type\" : \"NumConstNode\", \"value\" : " << datatree.num_constants.get(id) << "}";
+  output << "{\"node_type\" : \"NumConstNode\", \"value\" : ";
+  double testval = datatree.num_constants.getDouble(id);
+  if (testval < 1.0 && testval > -1.0 && testval != 0.0)
+    output << "0";
+  output << datatree.num_constants.get(id) << "}";
 }
 
 void