From 83639b8ef8790fcf00ae87f5b7b46df59a67bc52 Mon Sep 17 00:00:00 2001
From: David Anson <david@dlaa.me>
Date: Fri, 24 Jun 2016 23:13:00 -0700
Subject: [PATCH] Add support to MD011 for Markdown Extra-style footnotes
 (fixes #18).

---
 doc/Rules.md                    |  4 ++++
 lib/rules.js                    |  2 +-
 test/markdown-extra-footnote.md | 12 ++++++++++++
 3 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 test/markdown-extra-footnote.md

diff --git a/doc/Rules.md b/doc/Rules.md
index 48e24e73..b2896a4b 100644
--- a/doc/Rules.md
+++ b/doc/Rules.md
@@ -260,6 +260,10 @@ To fix this, swap the `[]` and `()` around:
 
     [Correct link syntax](http://www.example.com/)
 
+Note: [Markdown Extra](https://en.wikipedia.org/wiki/Markdown_Extra)-style footnotes do not trigger this rule:
+
+    For (example)[^1]
+
 ## MD012 - Multiple consecutive blank lines
 
 Tags: whitespace, blank_lines
diff --git a/lib/rules.js b/lib/rules.js
index 986df2b8..36e52118 100644
--- a/lib/rules.js
+++ b/lib/rules.js
@@ -327,7 +327,7 @@ module.exports = [
     "aliases": [ "no-reversed-links" ],
     "func": function MD011(params, errors) {
       forEachInlineChild(params, "text", function forToken(token) {
-        if (/\([^)]+\)\[[^\]]+\]/.test(token.content)) {
+        if (/\([^)]+\)\[[^\]^][^\]]*\]/.test(token.content)) {
           errors.push(token.lineNumber);
         }
       });
diff --git a/test/markdown-extra-footnote.md b/test/markdown-extra-footnote.md
new file mode 100644
index 00000000..2c7aafe7
--- /dev/null
+++ b/test/markdown-extra-footnote.md
@@ -0,0 +1,12 @@
+# Header
+
+Text with Markdown Extra footnote[^1]
+
+Text with (parenthesized footnote)[^2]
+
+This is not a (parenthesized footnote)[x^y] {MD011}
+
+Nor (is this)[z] {MD011}
+
+[^1]: Footnote
+[^2]: Another footnote