From 9d03a5b6a1580eeff70f530c955869c9113c679f Mon Sep 17 00:00:00 2001
From: Yanis Benson <yanis.benson@gmail.com>
Date: Fri, 24 Jan 2020 19:09:23 +0300
Subject: [PATCH] allow 0 as numeric identifier, fixes #18

---
 index.js |  2 +-
 test.js  | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 50076cd..78eaacf 100644
--- a/index.js
+++ b/index.js
@@ -1,2 +1,2 @@
 'use strict';
-module.exports = () => /(?<=^v?|\sv?)(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)(?:-(?:[1-9]\d*|[\da-z-]*[a-z-][\da-z-]*)(?:\.(?:[1-9]\d*|[\da-z-]*[a-z-][\da-z-]*))*)?(?:\+[\da-z-]+(?:\.[\da-z-]+)*)?(?=$|\s)/ig;
+module.exports = () => /(?<=^v?|\sv?)(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)(?:-(?:0|[1-9]\d*|[\da-z-]*[a-z-][\da-z-]*)(?:\.(?:0|[1-9]\d*|[\da-z-]*[a-z-][\da-z-]*))*)?(?:\+[\da-z-]+(?:\.[\da-z-]+)*)?(?=$|\s)/ig;
diff --git a/test.js b/test.js
index 0883679..f02507e 100644
--- a/test.js
+++ b/test.js
@@ -83,3 +83,16 @@ test('#14, does not match sub-strings of longer semver-similar strings, respect
 		t.notRegex(string, semverRegex());
 	}
 });
+
+test('#18, allow 0 as numeric identifier', t => {
+	for (const string of [
+		'0.2.3-alpha.10.beta+build.unicorn.rainbow',
+		'1.0.3-alpha.10.beta+build.unicorn.rainbow',
+		'1.2.0-alpha.10.beta+build.unicorn.rainbow',
+		'1.2.3-0.10.beta+build.unicorn.rainbow',
+		'1.2.3-alpha.0.beta+build.unicorn.rainbow',
+		'1.2.3-alpha.10.0+build.unicorn.rainbow'
+	]) {
+		t.regex(string, semverRegex());
+	}
+});