Add # foldable_groups option for comment

bootleq · bootleq · commit 8cf26a5e204b · 2015-09-28T23:45:36.000+08:00
Known `=begin xxx` should be valid comment, but seems not detected well
when ruby_no_comment_fold is set.
diff --git a/doc/ft-ruby-syntax.txt b/doc/ft-ruby-syntax.txt
@@ -69,6 +69,7 @@ value is space-separated keywords, known keywords were:
     /          Regexp
     string     String and shell command output (surrounded by ', ", `)
     :          Symbol
+    #          Multiline comment
     <<         Here documents
 
 5. Reducing expensive operations		*ruby_no_expensive*
diff --git a/etc/examples/generators/syntax/percent_generator.rb b/etc/examples/generators/syntax/percent_generator.rb
@@ -567,6 +567,28 @@
 
 
 
+# comment {{{
+if arg == 'comment'
+  puts <<-END.gsub(/^ {4}/, '')
+      # foo
+      # foo
+        # bar
+
+      baz
+
+
+
+    =begin foo bar
+      comment
+    =end baz
+
+
+  END
+end
+# }}}
+
+
+
 puts "#\svim:foldmethod=syntax"
 
 
diff --git a/etc/examples/syntax/percent/comment.rb b/etc/examples/syntax/percent/comment.rb
@@ -0,0 +1,16 @@
+# Generated by `./etc/examples/generators/syntax/percent_generator.rb comment > etc/examples/syntax/percent/comment.rb`
+
+  # foo
+  # foo
+    # bar
+
+  baz
+
+
+
+=begin foo bar
+  comment
+=end baz
+
+
+# vim:foldmethod=syntax
diff --git a/syntax/ruby.vim b/syntax/ruby.vim
@@ -436,7 +436,7 @@ endif
 syn match   rubySharpBang "\%^#!.*" display
 syn keyword rubyTodo	  FIXME NOTE TODO OPTIMIZE HACK REVIEW XXX todo contained
 syn match   rubyComment   "#.*" contains=rubySharpBang,rubySpaceError,rubyTodo,@Spell
-if !exists("ruby_no_comment_fold")
+if !exists("ruby_no_comment_fold") && s:foldable('#')
   syn region rubyMultilineComment start="\%(\%(^\s*#.*\n\)\@<!\%(^\s*#.*\n\)\)\%(\(^\s*#.*\n\)\{1,}\)\@=" end="\%(^\s*#.*\n\)\@<=\%(^\s*#.*\n\)\%(^\s*#\)\@!" contains=rubyComment transparent fold keepend
   syn region rubyDocumentation	  start="^=begin\ze\%(\s.*\)\=$" end="^=end\%(\s.*\)\=$" contains=rubySpaceError,rubyTodo,@Spell fold
 else
