From 184d8e09b60031b8e05babc2ab3b73a05f2d5493 Mon Sep 17 00:00:00 2001
From: Alexander Kuleshov <kuleshovmail@gmail.com>
Date: Wed, 18 Nov 2015 17:36:57 +0100
Subject: [PATCH] conform: convert complex fields with empty values in a
 consistent way

(https://github.com/xerions/conform/issues/6)
---
 src/conf_parse.erl | 9 ++++++++-
 src/conf_parse.peg | 9 ++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/conf_parse.erl b/src/conf_parse.erl
index 66b5867..e9eed47 100644
--- a/src/conf_parse.erl
+++ b/src/conf_parse.erl
@@ -137,7 +137,14 @@ parse(Input) when is_binary(Input) ->
         Bin ->
             Len      = erlang:byte_size(Bin),
             Unquoted = erlang:binary_part(Bin, {1, Len - 2}),
-            binary_to_list(Unquoted)
+	    case Bin of
+	        <<"\"\"">> ->
+		    <<>>;
+	        <<"\'\'">> ->
+		    "";
+                _ ->
+                    binary_to_list(Unquoted)
+            end
     end
  end).
 
diff --git a/src/conf_parse.peg b/src/conf_parse.peg
index 174433d..0c6d622 100644
--- a/src/conf_parse.peg
+++ b/src/conf_parse.peg
@@ -69,7 +69,14 @@ string_value <- (!((ws* crlf) / comment) '"' (!'"' ("\\\\" / '\\"' / .))* ("\r"?
         Bin ->
             Len      = erlang:byte_size(Bin),
             Unquoted = erlang:binary_part(Bin, {1, Len - 2}),
-            binary_to_list(Unquoted)
+	    case Bin of
+	        <<"\"\"">> ->
+		    <<>>;
+	        <<"\'\'">> ->
+		    "";
+                _ ->
+                    binary_to_list(Unquoted)
+            end
     end
 %};