Prevent endless defs from starting a method region

dkearns · dkearns · commit ee99a4cdb693 · 2021-11-03T23:42:04.000+11:00
This assumes endless defs are one-liners. Fixes #439
diff --git a/spec/syntax/methods_spec.rb b/spec/syntax/methods_spec.rb
@@ -33,4 +33,15 @@ def foo bar=:baz
       def foo bar:; end
     EOF
   end
+
+  specify "endless def does not start a method region" do
+    assert_correct_highlighting <<~'EOF', 'end', ''
+      def foo = bar
+      end
+    EOF
+    assert_correct_highlighting <<~'EOF', 'end', ''
+      def foo (a, b) = bar
+      end
+    EOF
+  end
 end
diff --git a/syntax/ruby.vim b/syntax/ruby.vim
@@ -363,6 +363,9 @@ if !exists("b:ruby_no_expensive") && !exists("ruby_no_expensive")
   SynFold 'class'  syn region rubyClassBlock  start="\<class\>"  matchgroup=rubyClass  skip="\<end:"			       end="\<end\>" contains=ALLBUT,@rubyNotTop
   SynFold 'module' syn region rubyModuleBlock start="\<module\>" matchgroup=rubyModule skip="\<end:"			       end="\<end\>" contains=ALLBUT,@rubyNotTop
 
+  " endless def
+  syn match rubyDefine "\<def\s\+\ze[^[:space:];#(]\+\%(\s\+\|\s*(.*)\s*\)=" nextgroup=rubyMethodDeclaration skipwhite
+
   " modifiers
   syn match rubyLineContinuation    "\\$" nextgroup=@rubyModifier skipwhite skipnl
   syn match rubyConditionalModifier "\<\%(if\|unless\)\>"
