Create JSON parser that doesn't consider regex syntax

A better long-term idea might be to take "brackets" as input, but let's
go with this for now and see if we have more edge cases.

Author: AndrewRadev

autoload/sj.vim

@@ -673,12 +673,12 @@ endfunction
 " start and end.
 "
 " Different languages have different rules for delimiters, so it might be a
-" better idea to write a specific parser. See autoload/sj/argparser/js.vim for
-" inspiration.
+" better idea to write a specific parser. See autoload/sj/argparser/json.vim
+" for inspiration.
 "
 function! sj#ParseJsonObjectBody(from, to)
   " Just use js object parser
-  let parser = sj#argparser#js#Construct(a:from, a:to, getline('.'))
+  let parser = sj#argparser#json#Construct(a:from, a:to, getline('.'))
   call parser.Process()
   return parser.args
 endfunction

autoload/sj/argparser/json.vim

@@ -0,0 +1,29 @@
+function! sj#argparser#json#Construct(start_index, end_index, line)
+  let parser = sj#argparser#common#Construct(a:start_index, a:end_index, a:line)
+
+  call extend(parser, {
+        \ 'Process': function('sj#argparser#json#Process'),
+        \ })
+
+  return parser
+endfunction
+
+" Note: Differs from "js" parser by the fact that JSON doesn't have /regexes/
+" to skip through.
+function! sj#argparser#json#Process() dict
+  while !self.Finished()
+    if self.body[0] == ','
+      call self.PushArg()
+      call self.Next()
+      continue
+    elseif self.body[0] =~ "[\"'{\[(]"
+      call self.JumpPair("\"'{[(", "\"'}])")
+    endif
+
+    call self.PushChar()
+  endwhile
+
+  if len(sj#Trim(self.current_arg)) > 0
+    call self.PushArg()
+  endif
+endfunction

spec/plugin/yaml_spec.rb

@@ -686,5 +686,20 @@
           - prop: { a: 'one', b: 'two' }
       EOF
     end
+
+    specify "splitting paths in maps" do
+      set_file_contents <<~EOF
+        - copy: { dest: /etc/default/locale, content: "LANG=en_US.UTF-8" }
+      EOF
+
+      vim.search 'dest'
+      split
+
+      assert_file_contents <<~EOF
+        - copy:
+            dest: /etc/default/locale
+            content: "LANG=en_US.UTF-8"
+      EOF
+    end
   end
 end