From f62f91313259539e8f0884a0ca99deb3ab8b87d3 Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@peterzhu.ca>
Date: Tue, 8 Mar 2022 17:02:35 -0500
Subject: [ruby/rdoc] Support crossref of methods with multiple arguments

For example, consider the following markup:

  C1#m(a, b)

Before this patch, it generated this HTML:

  <p><a href=\"C1.html#method-i-m\"><code>C1#m</code></a>(a, b)</p>

Which places the method arguments outside of the link.

Now it generates this HTML:

  <a href=\"C1.html#method-i-m\"><code>C1#m(a, b)</code></a>

https://github.com/ruby/rdoc/commit/05a2b2222b
---
 lib/rdoc/cross_reference.rb | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'lib/rdoc/cross_reference.rb')

diff --git a/lib/rdoc/cross_reference.rb b/lib/rdoc/cross_reference.rb
index 7c0b405f3a..0f301dcbb3 100644
--- a/lib/rdoc/cross_reference.rb
+++ b/lib/rdoc/cross_reference.rb
@@ -14,12 +14,22 @@ class RDoc::CrossReference
 
   CLASS_REGEXP_STR = '\\\\?((?:\:{2})?[A-Z]\w*(?:\:\:\w+)*)'
 
+  ##
+  # Regular expression to match a single method argument.
+
+  METHOD_ARG_REGEXP_STR = '[\w.+*/=<>-]+'
+
+  ##
+  # Regular expression to match method arguments.
+
+  METHOD_ARGS_REGEXP_STR = /(?:\((?:#{METHOD_ARG_REGEXP_STR}(?:,\s*#{METHOD_ARG_REGEXP_STR})*)?\))?/.source
+
   ##
   # Regular expression to match method references.
   #
   # See CLASS_REGEXP_STR
 
-  METHOD_REGEXP_STR = '([A-Za-z]\w*[!?=]?|%|=(?:==?|~)|![=~]|\[\]=?|<(?:<|=>?)?|>[>=]?|[-+!]@?|\*\*?|[/%`|&^~])(?:\([\w.+*/=<>-]*\))?'
+  METHOD_REGEXP_STR = /([A-Za-z]\w*[!?=]?|%|=(?:==?|~)|![=~]|\[\]=?|<(?:<|=>?)?|>[>=]?|[-+!]@?|\*\*?|[\/%`|&^~])#{METHOD_ARGS_REGEXP_STR}/.source
 
   ##
   # Regular expressions matching text that should potentially have
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