From bbc76a02280c675f194ae9775b62b001e84d7343 Mon Sep 17 00:00:00 2001
From: Daniel Kang <me@daniel.gs>
Date: Sat, 26 Jan 2019 06:40:13 -0800
Subject: [PATCH] add 'to_json' and 'from_json' to builtin documentation

---
 docs/builtins.md | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/docs/builtins.md b/docs/builtins.md
index 266249a..e512705 100644
--- a/docs/builtins.md
+++ b/docs/builtins.md
@@ -63,6 +63,26 @@ v := [1]
 v = append(v, 2, 3) // v == [1, 2, 3]
 ```
 
+## to_json
+
+Returns the JSON encoding of an object.
+
+```golang
+print(to_json([1, 2, 3]))  // [1, 2, 3]
+print(to_json(4))          // 4
+print(to_json("five"))     // "five"
+```
+
+## from_json
+
+Parses the JSON-encoded data and returns an object.
+
+```golang
+arr := from_json(`[1, 2, 3]`)
+four := from_json(`4`)
+five := from_json(`"five"`)
+```
+
 ## string
 
 Tries to convert an object to string object. See [this](https://github.com/d5/tengo/wiki/Variable-Types) for more details on type conversion.