From e4e30bd0187c875e9778e7c4ac9eb3c48753c97a Mon Sep 17 00:00:00 2001
From: David Grudl <david@grudl.com>
Date: Thu, 19 Dec 2019 19:57:19 +0100
Subject: [PATCH] Literal cannot begin with a character ':' when it follows
 after '" to improve JSON compatibility (syntax BC break)

---
 src/Neon/Decoder.php                 | 2 +-
 tests/Neon/Decoder.inline.array.phpt | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Neon/Decoder.php b/src/Neon/Decoder.php
index d1379dc2..f8411f93 100644
--- a/src/Neon/Decoder.php
+++ b/src/Neon/Decoder.php
@@ -27,7 +27,7 @@ final class Decoder
 
 		// literal / boolean / integer / float
 		'
-			(?: [^#"\',:=[\]{}()\x00-\x20`-] | [:-] [^"\',=[\]{}()\s] )
+			(?: [^#"\',:=[\]{}()\x00-\x20`-] | (?<!["\']) [:-] [^"\',=[\]{}()\s] )
 			(?:
 				[^,:=\]})(\x00-\x20]++ |
 				:(?! [\s,\]})] | $ ) |
diff --git a/tests/Neon/Decoder.inline.array.phpt b/tests/Neon/Decoder.inline.array.phpt
index 46e37ebf..93bb7cee 100644
--- a/tests/Neon/Decoder.inline.array.phpt
+++ b/tests/Neon/Decoder.inline.array.phpt
@@ -105,3 +105,6 @@ Assert::equal(
 	]),
 	Neon::decode('1() 2()')
 );
+
+// JSON compatibility
+Assert::same(['a' => true], Neon::decode('{"a":true}'));