Cross references to operator methods

lib/rdoc/cross_reference.rb

@@ -19,7 +19,7 @@ class RDoc::CrossReference
   #
   # See CLASS_REGEXP_STR
 
-  METHOD_REGEXP_STR = '([A-Za-z]\w*[!?=]?|%|===?|\[\]=?|<<|>>|\+@|-@|-|\+|\*)(?:\([\w.+*/=<>-]*\))?'
+  METHOD_REGEXP_STR = '([A-Za-z]\w*[!?=]?|%|=(?:==?|~)|![=~]|\[\]=?|<(?:<|=>?)?|>[>=]?|[-+!]@?|\*\*?|[/%])(?:\([\w.+*/=<>-]*\))?'
 
   ##
   # Regular expressions matching text that should potentially have

test/rdoc/test_rdoc_cross_reference.rb

@@ -2,6 +2,7 @@
 require File.expand_path '../xref_test_case', __FILE__
 
 class TestRDocCrossReference < XrefTestCase
+  OPERATOR_METHODS = %w'== === != =~ !~ < > <= >= <=> [] []= << >> -@ +@ ! - + * / % **'
 
   def setup
     super
@@ -10,17 +11,17 @@ def setup
   end
 
   def assert_ref expected, name
-    assert_equal expected, @xref.resolve(name, 'fail')
+    assert_equal expected, @xref.resolve(name, 'fail'), name
   end
 
   def refute_ref name
-    assert_equal name, @xref.resolve(name, name)
+    assert_equal name, @xref.resolve(name, name), name
   end
 
   def test_METHOD_REGEXP_STR
-    re = /#{RDoc::CrossReference::METHOD_REGEXP_STR}/
+    re = /\A(?:#{RDoc::CrossReference::METHOD_REGEXP_STR})\z/
 
-    %w'== === [] []= << >>'.each do |x|
+    OPERATOR_METHODS.each do |x|
       re =~ x
       assert_equal x, $&
     end
@@ -170,6 +171,22 @@ def test_resolve_method_equals3
     assert_ref m, '==='
   end
 
+  def test_resolve_method_operator
+    stats = RDoc::Stats.new @store, 0
+    OPERATOR_METHODS.each do |x|
+      RDoc::Parser::Ruby.new(@xref_data, @file_name, "#{<<~"begin;"}\n#{<<~"end;"}", @options, stats).scan
+      begin;
+        class C1
+          def #{x}(*)
+          end
+        end
+      end;
+
+      m = @c1.find_instance_method_named(x)
+      assert_ref m, x
+    end
+  end
+
   def test_resolve_page
     page = @store.add_file 'README.txt', parser: RDoc::Parser::Simple