diff --git a/.gitmodules b/.gitmodules
index f8aa23d..fac66e6 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +1,6 @@
 [submodule "msgpack-d"]
 	path = msgpack-d
 	url = https://github.com/msgpack/msgpack-d.git
-[submodule "dscanner"]
-	path = dscanner
-	url = https://github.com/Hackerpilot/Dscanner.git
 [submodule "editors/ktexteditor"]
 	path = editors/ktexteditor
 	url = https://github.com/Dav1dde/lumen.git
@@ -13,3 +10,7 @@
 [submodule "containers"]
 	path = containers
 	url = https://github.com/economicmodeling/containers.git
+[submodule "libdparse"]
+	path = libdparse
+	url = https://github.com/Hackerpilot/libdparse.git
+	branch = master
diff --git a/autocomplete.d b/autocomplete.d
index 12eab8f..c91968f 100644
--- a/autocomplete.d
+++ b/autocomplete.d
@@ -205,8 +205,7 @@ auto getTokensBeforeCursor(const(ubyte[]) sourceCode, size_t cursorPosition,
 {
 	LexerConfig config;
 	config.fileName = "stdin";
-	auto tokens = byToken(cast(ubyte[]) sourceCode, config, cache);
-	tokenArray = tokens.array();
+	tokenArray = getTokensForParser(cast(ubyte[]) sourceCode, config, cache);
 	auto sortedTokens = assumeSorted(tokenArray);
 	return sortedTokens.lowerBound(cast(size_t) cursorPosition);
 }
diff --git a/build.bat b/build.bat
index 9c7bab1..8913129 100644
--- a/build.bat
+++ b/build.bat
@@ -1,3 +1,3 @@
-dmd -wi client.d messages.d stupidlog.d msgpack-d/src/msgpack.d -Imsgpack-d/src -release -inline -O -ofdcd-client
+dmd -wi client.d messages.d stupidlog.d msgpack-d/src/msgpack.d -Imsgpack-d/src -release -inline -O -ofdcd-client -L/EXETYPE:NT -L/SUBSYSTEM:WINDOWS
 
 dmd  actypes.d conversion/astconverter.d conversion/first.d conversion/second.d conversion/third.d autocomplete.d constants.d messages.d modulecache.d semantic.d server.d stupidlog.d string_interning.d dscanner/std/d/ast.d dscanner/std/d/entities.d dscanner/std/d/lexer.d dscanner/std/d/parser.d dscanner/std/lexer.d dscanner/std/allocator.d dscanner/formatter.d containers/src/memory/appender.d containers/src/memory/allocators.d containers/src/containers/dynamicarray.d containers/src/containers/ttree.d containers/src/containers/hashset.d containers/src/containers/unrolledlist.d containers/src/containers/internal/hash.d msgpack-d/src/msgpack.d -Icontainers/src -Imsgpack-d/src -Idscanner -wi -g -O -release -ofdcd-server
diff --git a/build.sh b/build.sh
index 31095cd..d80d54d 100755
--- a/build.sh
+++ b/build.sh
@@ -23,13 +23,13 @@ dmd\
 	server.d\
 	stupidlog.d\
 	string_interning.d\
-	dscanner/std/d/ast.d\
-	dscanner/std/d/entities.d\
-	dscanner/std/d/lexer.d\
-	dscanner/std/d/parser.d\
-	dscanner/std/lexer.d\
-	dscanner/std/allocator.d\
-	dscanner/formatter.d\
+	libdparse/src/std/d/ast.d\
+	libdparse/src/std/d/entities.d\
+	libdparse/src/std/d/lexer.d\
+	libdparse/src/std/d/parser.d\
+	libdparse/src/std/lexer.d\
+	libdparse/src/std/allocator.d\
+	libdparse/src/std/d/formatter.d\
 	containers/src/memory/allocators.d\
 	containers/src/memory/appender.d\
 	containers/src/containers/dynamicarray.d\
diff --git a/containers b/containers
index 36a00d9..2a72525 160000
--- a/containers
+++ b/containers
@@ -1 +1 @@
-Subproject commit 36a00d9f109fde9c53db3173fae39439b007c0ce
+Subproject commit 2a72525f649850f452f21e7f362f70440f487a61
diff --git a/conversion/astconverter.d b/conversion/astconverter.d
index 67657fb..ac17f56 100644
--- a/conversion/astconverter.d
+++ b/conversion/astconverter.d
@@ -63,7 +63,8 @@ class SimpleParser : Parser
 	override Unittest parseUnittest()
 	{
 		expect(tok!"unittest");
-		skipBraces();
+		if (currentIs(tok!"{"))
+			skipBraces();
 		return null;
 	}
 
diff --git a/conversion/first.d b/conversion/first.d
index 6e107f7..b4411d8 100644
--- a/conversion/first.d
+++ b/conversion/first.d
@@ -19,7 +19,7 @@
 module conversion.first;
 
 import actypes;
-import formatter;
+import std.d.formatter;
 import std.allocator;
 import memory.allocators;
 import memory.appender;
diff --git a/conversion/third.d b/conversion/third.d
index 9d34561..5a832e2 100644
--- a/conversion/third.d
+++ b/conversion/third.d
@@ -190,7 +190,7 @@ private:
 
 	ACSymbol* processSuffix(ACSymbol* symbol, const TypeSuffix suffix)
 	{
-		import formatter;
+		import std.d.formatter;
 		if (suffix.star)
 			return symbol;
 		if (suffix.array || suffix.type)
diff --git a/dscanner b/dscanner
deleted file mode 160000
index f54f782..0000000
--- a/dscanner
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit f54f7823dc62c14b7afb6b7db6e7693e79be34fa
diff --git a/editors/emacs/README.md b/editors/emacs/README.md
index 780920b..2cf9285 100644
--- a/editors/emacs/README.md
+++ b/editors/emacs/README.md
@@ -1,16 +1,44 @@
-#EMACS Integration
-
-This is a first cut at emacs support.  It is far from complete.
+#Emacs Integration
 
 ##Requirements
-* You must have the [auto-complete](https://github.com/auto-complete/auto-complete) package
-* This integration will not automatically start dcd-server, so you'll have to do that yourself.
-* Make sure dcd-client is in your path
-* Add the following to your .emacs
+* You must have the [auto-complete](https://github.com/auto-complete/auto-complete) package.
+[yasnippet](https://github.com/capitaomorte/yasnippet) and [popwin](https://github.com/m2ym/popwin-el) is recommended.
+* Make sure dcd-client and dcd-server is in your exec-path. Otherwise, please set the variable ```dcd-exectutable``` and ```dcd-server-executable``` using ```M-x customize```.
 
-        (require 'ac-dcd)
-        (add-to-list 'ac-modes 'd-mode)
-        (defun ac-d-mode-setup ()
-          (setq ac-sources (append '(ac-source-dcd) ac-sources))
-          (global-auto-complete-mode t))
-        (add-hook 'd-mode-hook 'ac-d-mode-setup)
+## Setup
+* First, follow the Setup section in the root README.
+* Second, add the following to your .emacs. With this setting, dcd-server starts automatically when you open file in d-mode.  (Of course, you should edit ```path_to_ac-dcd.el``` to suit your enviroment.)
+
+```
+;;; ac-dcd
+(add-to-list 'load-path "path_to_ac-dcd.el")
+(require 'ac-dcd)
+(add-to-list 'ac-modes 'd-mode)
+
+(add-hook 'd-mode-hook
+		  '(lambda () "set up ac-dcd"
+			 (ac-dcd-maybe-start-server)
+			 (add-to-list 'ac-sources 'ac-source-dcd)))
+
+(define-key d-mode-map (kbd "C-c ?") 'ac-dcd-show-ddoc-with-buffer)
+(define-key d-mode-map (kbd "C-c .") 'ac-dcd-goto-definition)
+(define-key d-mode-map (kbd "C-c ,") 'ac-dcd-goto-def-pop-marker)
+
+(when (featurep 'popwin)
+(add-to-list 'popwin:special-display-config
+`(,ac-dcd-document-buffer-name :position right :width 80)))
+```
+
+* Third, set import path using ```M-x customize-variable RET ac-dcd-flags```.
+* When something is wrong, please check variables with ```M-x customize-apropos RET ac-dcd``` and restart server with ```M-x ac-dcd-init-server```.
+
+## Features
+* Dlang source for auto-complete
+* Function calltip expansion with yasnippet
+* Show ddoc with ```C-c ?```
+* Goto definition with ```C-c .```
+* After goto definition, you can pop to previous position with ```C-c ,```
+
+## TODO
+* Better error handling
+* Multi byte character support (Need help!)
diff --git a/editors/emacs/ac-dcd.el b/editors/emacs/ac-dcd.el
index 3c4f121..6816a3f 100644
--- a/editors/emacs/ac-dcd.el
+++ b/editors/emacs/ac-dcd.el
@@ -21,54 +21,110 @@
 
 ;;; Code:
 
-(provide 'ac-dcd)
 (require 'auto-complete)
-
+(require 'rx)
+(require 'yasnippet)
+(require 'eshell)
 (defcustom ac-dcd-executable
-  (executable-find "dcd-client")
-  "*Location of dcd-client executable"
+  "dcd-client"
+  "Location of dcd-client executable."
   :group 'auto-complete
   :type 'file)
 
-;;; Extra compilation flags to pass to dcd.
 (defcustom ac-dcd-flags nil
-  "Extra flags to pass to the Dcd executable.
-This variable will typically contain include paths, e.g., ( \"-I~/MyProject\", \"-I.\" )."
+  "Extra flags to pass to the dcd-server.
+This variable will typically contain include paths,
+e.g., (\"-I~/MyProject\", \"-I.\").
+You can't put port number flag here.  Set `ac-dcd-server-port' instead."
   :group 'auto-complete
   :type '(repeat (string :tag "Argument" "")))
 
 (defconst ac-dcd-completion-pattern
-  "^\\(%s[^\s\n]*\\)[ \t]+[cisuvmkfgepM]")
+  "^\\(%s[^\s\n]*\\)[ \t]+\\([cisuvmkfgepM]\\)"
+  "Regex to parse dcd output.
+\\1 is candidate itself, \\2 is kind of candidate.")
 
-(defconst ac-dcd-error-buffer-name "*dcd error*")
+(defconst ac-dcd-error-buffer-name "*dcd-error*")
+(defconst ac-dcd-output-buffer-name "*dcd-output*")
+(defconst ac-dcd-document-buffer-name "*dcd-document*")
+(defcustom ac-dcd-server-executable
+  "dcd-server"
+  "Location of dcd-server executable."
+  :group 'auto-complete
+  :type 'file)
+
+(defcustom ac-dcd-server-port 9166
+  "Port number of dcd-server.  default is 9166."
+  :group 'auto-complete)
+
+(defvar ac-dcd-delay-after-kill-process 200
+  "Duration after killing server process in milli second.
+If `ac-dcd-init-server' doesn't work correctly, please set bigger number for this variable.")
+
+
+;;server handle functions
+
+(defun ac-dcd-stop-server ()
+  "Stop dcd-server manually.  Ordinary, you don't have to call it.
+If you want to restart server, use `ac-dcd-init-server' instead."
+  (interactive)
+  (interrupt-process "dcd-server"))
+
+(defsubst ac-dcd-start-server ()
+  "Start dcd-server."
+  (let ((buf (get-buffer-create "*dcd-server*")))
+	(with-current-buffer buf (start-process "dcd-server" (current-buffer)
+											ac-dcd-server-executable 
+											(mapconcat 'identity ac-dcd-flags " ")
+											"-p"
+											(format "%s" ac-dcd-server-port)
+											))))
+
+(defun ac-dcd-maybe-start-server ()
+  "Start dcd-server.  When the server process is already running, do nothing."
+  (unless (get-process "dcd-server")
+	(ac-dcd-start-server)))
+
+(defun ac-dcd-init-server ()
+  "Start dcd-server.  When the server process is already running, restart it."
+  (interactive)
+  (when (get-process "dcd-server")
+	(ac-dcd-stop-server)
+	(sleep-for 0 ac-dcd-delay-after-kill-process))
+  (ac-dcd-start-server))
+
+
+;; output parser functions
 
 (defun ac-dcd-parse-output (prefix)
+  "Parse dcd output."
   (goto-char (point-min))
   (let ((pattern (format ac-dcd-completion-pattern
                          (regexp-quote prefix)))
-        lines match detailed_info
+        lines match detailed-info
         (prev-match ""))
     (while (re-search-forward pattern nil t)
       (setq match (match-string-no-properties 1))
       (unless (string= "Pattern" match)
-        (setq detailed_info (match-string-no-properties 2))
+        (setq detailed-info (match-string-no-properties 2))
         (if (string= match prev-match)
             (progn
-              (when detailed_info
+              (when detailed-info
                 (setq match (propertize match
                                         'ac-dcd-help
                                         (concat
                                          (get-text-property 0 'ac-dcd-help (car lines))
                                          "\n"
-                                         detailed_info)))
+                                         detailed-info)))
                 (setf (car lines) match)))
           (setq prev-match match)
-          (when detailed_info
-            (setq match (propertize match 'ac-dcd-help detailed_info)))
+          (when detailed-info
+            (setq match (propertize match 'ac-dcd-help detailed-info)))
           (push match lines))))
     lines))
 
 (defun ac-dcd-handle-error (res args)
+  "Notify error on parse failure."
   (goto-char (point-min))
   (let* ((buf (get-buffer-create ac-dcd-error-buffer-name))
          (cmd (concat ac-dcd-executable " " (mapconcat 'identity args " ")))
@@ -89,72 +145,51 @@ This variable will typically contain include paths, e.g., ( \"-I~/MyProject\", \
         (setq buffer-read-only t)
         (goto-char (point-min))))))
 
-(defun ac-dcd-call-process (prefix &rest args)
-  (let ((buf (get-buffer-create "*dcd-output*"))
+
+;; utility functions to call process
+
+(defun ac-dcd-call-process (prefix args)
+  (let ((buf (get-buffer-create ac-dcd-output-buffer-name))
         res)
     (with-current-buffer buf (erase-buffer))
     (setq res (apply 'call-process-region (point-min) (point-max)
-		     ac-dcd-executable nil buf nil args))
+					 ac-dcd-executable nil buf nil
+					 args
+					 ))
     (with-current-buffer buf
       (unless (eq 0 res)
         (ac-dcd-handle-error res args))
       ;; Still try to get any useful input.
       (ac-dcd-parse-output prefix))))
 
+(defsubst ac-dcd-cursor-position ()
+  "Get cursor position to pass to dcd-client.
+TODO: multi byte character support"
+  (point))
+
 (defsubst ac-dcd-build-complete-args (pos)
-  (append '()
-	  '("-c")
-	  (list (format "%s" pos))
-  	  ac-dcd-flags))
+  (list
+   "-c"
+   (format "%s" pos)
+   "-p"
+   (format "%s" ac-dcd-server-port)
+   ))
 
 
-(defsubst ac-dcd-clean-document (s)
-  (when s
-    (setq s (replace-regexp-in-string "<#\\|#>\\|\\[#" "" s))
-    (setq s (replace-regexp-in-string "#\\]" " " s)))
-  s)
-
-(defun ac-dcd-document (item)
-  (if (stringp item)
-      (let (s)
-        (setq s (get-text-property 0 'ac-dcd-help item))
-        (ac-dcd-clean-document s))))
-
 (defsubst ac-in-string/comment ()
   "Return non-nil if point is in a literal (a comment or string)."
   (nth 8 (syntax-ppss)))
 
+
+;; interface to communicate with auto-complete.el
+
 (defun ac-dcd-candidate ()
   (unless (ac-in-string/comment)
     (save-restriction
       (widen)
-      (apply 'ac-dcd-call-process
-             ac-prefix
-             (ac-dcd-build-complete-args (point))))))
-
-(defvar ac-template-start-point nil)
-(defvar ac-template-candidates (list "ok" "no" "yes:)"))
-
-(defun ac-dcd-action ()
-  (interactive)
-  (let ((help (ac-dcd-clean-document (get-text-property 0 'ac-dcd-help (cdr ac-last-completion))))
-        (raw-help (get-text-property 0 'ac-dcd-help (cdr ac-last-completion)))
-        (candidates (list)) ss fn args (ret-t "") ret-f)
-    (setq ss (split-string raw-help "\n"))
-    (dolist (s ss)
-      (when (string-match "\\[#\\(.*\\)#\\]" s)
-        (setq ret-t (match-string 1 s)))
-      (setq s (replace-regexp-in-string "\\[#.*?#\\]" "" s)))
-    (cond (candidates
-           (setq candidates (delete-dups candidates))
-           (setq candidates (nreverse candidates))
-           (setq ac-template-candidates candidates)
-           (setq ac-template-start-point (point))
-           (ac-complete-template)
-           (unless (cdr candidates) ;; unless length > 1
-             (message (replace-regexp-in-string "\n" "   ;    " help))))
-          (t
-           (message (replace-regexp-in-string "\n" "   ;    " help))))))
+      (ac-dcd-call-process
+	   ac-prefix
+	   (ac-dcd-build-complete-args (ac-dcd-cursor-position))))))
 
 (defun ac-dcd-prefix ()
   (or (ac-prefix-symbol)
@@ -166,64 +201,299 @@ This variable will typically contain include paths, e.g., ( \"-I~/MyProject\", \
                        (eq ?: (char-before (1- (point))))))
           (point)))))
 
+(defun ac-dcd-document (item)
+  "Return popup document of `ITEM'."
+  (if (stringp item)
+      (let (s)
+        (setq s (get-text-property 0 'ac-dcd-help item))
+		(cond
+		 ((equal s "c") "class")
+		 ((equal s "i") "interface")
+		 ((equal s "s") "struct")
+		 ((equal s "u") "union")
+		 ((equal s "v") "variable")
+		 ((equal s "m") "member variable")
+		 ((equal s "k") "keyword")
+		 ((equal s "f") "function")
+		 ((equal s "g") "enum")
+		 ((equal s "e") "enum member")
+		 ((equal s "P") "package")
+		 ((equal s "M") "module")
+		 ((equal s "a") "array")
+		 ((equal s "A") "associative array")
+		 ((equal s "l") "alias")
+		 ((equal s "t") "template")
+		 ((equal s "T") "mixin template")
+		 (t (format "candidate kind undetected: %s" s))
+		 ))))
+
+
+(defun ac-dcd-action ()
+  "Try function calltip expansion."
+  (when (featurep 'yasnippet)
+
+	(let ((lastcompl (cdr ac-last-completion)))
+	  (cond
+	   ((equal "f" (get-text-property 0 'ac-dcd-help lastcompl)) ; when it was a function
+		(progn
+		  (ac-complete-dcd-calltips)))
+	   (t nil)
+	   ))))
+
 (ac-define-source dcd
   '((candidates . ac-dcd-candidate)
     (prefix . ac-dcd-prefix)
     (requires . 0)
     (document . ac-dcd-document)
-    (action . ac-dcd-action)
-    (cache)))
-
-(defun ac-dcd-same-count-in-string (c1 c2 s)
-  (let ((count 0) (cur 0) (end (length s)) c)
-    (while (< cur end)
-      (setq c (aref s cur))
-      (cond ((eq c1 c)
-             (setq count (1+ count)))
-            ((eq c2 c)
-             (setq count (1- count))))
-      (setq cur (1+ cur)))
-    (= count 0)))
-
-(defun ac-dcd-split-args (s)
-  (let ((sl (split-string s ", *")))
-    (cond ((string-match "<\\|(" s)
-           (let ((res (list)) (pre "") subs)
-             (while sl
-               (setq subs (pop sl))
-               (unless (string= pre "")
-                 (setq subs (concat pre ", " subs))
-                 (setq pre ""))
-               (cond ((and (ac-dcd-same-count-in-string ?\< ?\> subs)
-                           (ac-dcd-same-count-in-string ?\( ?\) subs))
-                      (push subs res))
-                     (t
-                      (setq pre subs))))
-             (nreverse res)))
-          (t
-           sl))))
-
-(defun ac-template-candidate ()
-  ac-template-candidates)
-
-(defun ac-template-action ()
-  (interactive)
-  (unless (null ac-template-start-point)
-    (let ((pos (point)) sl (snp "")
-          (s (get-text-property 0 'raw-args (cdr ac-last-completion)))))))
-
-(defun ac-template-prefix ()
-  ac-template-start-point)
-
-
-;; this source shall only be used internally.
-(ac-define-source template
-  '((candidates . ac-template-candidate)
-    (prefix . ac-template-prefix)
-    (requires . 0)
-    (action . ac-template-action)
-    (document . ac-dcd-document)
+	(action . ac-dcd-action)
     (cache)
-    (symbol . "t")))
+	(symbol . "D")
+	))
 
-;;; auto-complete-dcd.el ends here
+
+;; function calltip expansion with yasnippet
+
+(defun ac-dcd-calltip-candidate ()
+  "Do calltip completion of the D symbol at point.
+The cursor must be at the end of a D symbol.
+When the symbol is not a function, returns nothing"
+  (let ((buf (get-buffer-create ac-dcd-output-buffer-name)))
+	(ac-dcd-call-process-for-calltips)
+	(with-current-buffer buf (ac-dcd-parse-calltips))
+	))
+
+(defun ac-dcd-call-process-for-calltips ()
+  "Call process to get calltips of the function at point."
+  (insert "( ;")
+  (backward-char 2)
+
+  (ac-dcd-call-process
+   (concat (cdr ac-last-completion) "(")
+   (ac-dcd-build-complete-args (ac-dcd-cursor-position)))
+
+  (forward-char 2)
+  (delete-char -3)
+  
+  )
+
+
+(defconst ac-dcd-calltip-pattern
+  (rx bol (submatch (* nonl)) (submatch "(" (* nonl) ")") eol)
+  "Regexp to parse calltip completion output.
+\\1 is function return type (if exists) and name, and \\2 is args.")
+
+(defsubst ac-dcd-cleanup-function-candidate (s)
+  "Remove return type of the head of the function.
+`S' is candidate string."
+  (let (res)
+	(with-temp-buffer
+	  (insert s)
+
+	  ;;goto beggining of function name
+	  (progn
+		(end-of-line)
+		(backward-sexp)
+		(re-search-backward (rx (or bol " "))))
+	  
+	  (setq res (buffer-substring
+				 (point)
+				 (progn
+				   (end-of-line)
+				   (point))))
+	  (when (equal " " (substring res 0 1))
+		(setq res (substring res 1)))
+	  res
+	  )))
+
+(defun ac-dcd-parse-calltips ()
+  "Parse dcd output for calltip completion.
+It returns a list of calltip candidates."
+  (goto-char (point-min))
+  (let ((pattern ac-dcd-calltip-pattern)
+		lines
+		match
+		(prev-match ""))
+	(while (re-search-forward pattern nil t)
+	  (setq match
+			(ac-dcd-cleanup-function-candidate
+			 (concat (match-string-no-properties 1) (match-string-no-properties 2))
+			 ))
+	  (push match lines))
+	lines
+	))
+
+(defun ac-dcd-calltip-action ()
+  "Format the calltip to yasnippet style.
+This function should be called at *dcd-output* buf."
+  (let (beg end)
+	(save-excursion	
+	  (setq end (point))
+	  (setq beg (progn
+				  (backward-sexp)
+				  (point)
+				  ))
+	  (kill-region beg end))
+	(let ((str (car kill-ring))
+		  yasstr)
+	  (setq kill-ring (cdr kill-ring)); clean up kill-ring
+
+	  ;;remove parenthesis
+	  (setq str (substring str 1 (- (length str) 1)))
+	  
+	  (setq yasstr
+			(mapconcat
+			 (lambda (s) "format each args to yasnippet style" (concat "${" s "}"))
+			 (split-string str ", ")
+			 ", "))
+	  (setq yasstr (concat "(" yasstr ")"))
+	  ;; ;;debug
+	  ;; (message (format "str: %s" str))
+	  ;; (message (format "yasstr: %s" yasstr))
+	  (yas-expand-snippet yasstr)
+	  )))
+
+(defun ac-dcd-calltip-prefix ()
+  (car ac-last-completion))
+
+(ac-define-source dcd-calltips
+  '((candidates . ac-dcd-calltip-candidate)
+	(prefix . ac-dcd-calltip-prefix)
+	(action . ac-dcd-calltip-action)
+	(cache)
+	))
+
+
+;;show document
+
+(defun ac-dcd-reformat-document ()
+  "Currently, it just decodes \n and \\n."
+  (with-current-buffer (get-buffer ac-dcd-document-buffer-name)
+
+	;;doit twice to catch '\n\n'
+	(goto-char (point-min))
+	(while (re-search-forward (rx (and (not (any "\\")) (submatch "\\n"))) nil t)
+	  (replace-match "\n" nil nil nil 1))
+	
+	(goto-char (point-min))
+	(while (re-search-forward (rx (and (not (any "\\")) (submatch "\\n"))) nil t)
+	  (replace-match "\n" nil nil nil 1))
+
+	;; replace '\\n' in D src to '\n'
+	(while (re-search-forward (rx "\\\\n") nil t)
+	  (replace-match "\\\\n"))
+	))
+
+(defun ac-dcd-get-ddoc (pos)
+  "Get document with `dcd-client --doc'.  `POS' is cursor position."
+  (save-buffer)
+  (let ((args 
+		 (append
+		  (ac-dcd-build-complete-args (ac-dcd-cursor-position))
+		  '("-d")
+		  (list (buffer-file-name))))
+		(buf (get-buffer-create ac-dcd-document-buffer-name)))
+
+	;; If I use `call-process', dcd-client errors out when to get long doc(e.g. doc of writef).
+	;; I have no idea why.
+	(with-current-buffer buf
+	  (erase-buffer)
+	  (eshell-command
+	   (mapconcat 'identity `(,(executable-find ac-dcd-executable) ,@args) " ")
+	   t)
+	  (when (or
+			 (string= (buffer-string) "")
+			 (string= (buffer-string) "\n\n\n")		;when symbol has no doc
+			 )
+		(error "No document for the symbol at point!"))
+	  (buffer-string)
+	  )))
+
+(defun ac-dcd-show-ddoc-with-buffer ()
+  "Display Ddoc at point using `display-buffer'."
+  (interactive)
+  (ac-dcd-get-ddoc (ac-dcd-cursor-position))
+  (ac-dcd-reformat-document)
+  (display-buffer (get-buffer-create ac-dcd-document-buffer-name)))
+
+
+;; goto definition
+;; thanks to jedi.el by Takafumi Arakaki
+
+(defcustom ac-dcd-goto-definition-marker-ring-length 16
+  "Length of marker ring to store `ac-dcd-goto-definition' call positions."
+  :group 'auto-complete)
+
+(defvar ac-dcd-goto-definition-marker-ring
+  (make-ring ac-dcd-goto-definition-marker-ring-length)
+  "Ring that stores ac-dcd-goto-symbol-declaration.")
+
+(defsubst ac-dcd-goto-def-push-marker ()
+  "Push marker at point to goto-def ring."
+  (ring-insert ac-dcd-goto-definition-marker-ring (point-marker)))
+
+(defun ac-dcd-goto-def-pop-marker ()
+  "Goto the point where `ac-dcd-goto-definition' was last called."
+  (interactive)
+  (if (ring-empty-p ac-dcd-goto-definition-marker-ring)
+	  (error "Marker ring is empty. Can't pop.")
+	(let ((marker (ring-remove ac-dcd-goto-definition-marker-ring 0)))
+	  (switch-to-buffer (or (marker-buffer marker)
+                            (error "Buffer has been deleted")))
+      (goto-char (marker-position marker))
+      ;; Cleanup the marker so as to avoid them piling up.
+      (set-marker marker nil nil))))
+
+(defun ac-dcd-goto-definition ()
+  "Goto declaration of symbol at point."
+  (interactive)
+  (save-buffer)  
+  (ac-dcd-call-process-for-symbol-declaration (point))
+  (let* ((data (ac-dcd-parse-output-for-get-symbol-declaration))
+		 (file (car data))
+		 (offset (cdr data)))
+	(if (equal data '(nil . nil))
+		(message "Not found")
+	  (progn
+		(ac-dcd-goto-def-push-marker)
+		(if (string=  file "stdin") ; When the declaration is in the current file
+			(progn
+			  (goto-char (point-min))
+			  (forward-char (string-to-number offset)))
+		  (progn
+			(find-file file)
+			(goto-char (point-min))
+			(forward-char (string-to-number offset))))))))
+
+;; utilities for goto-definition
+
+(defun ac-dcd-call-process-for-symbol-declaration (pos)
+  "Get location of symbol declaration with `dcd-client --symbolLocation'.
+`POS' is cursor position."
+  (let ((args 
+		 (append
+		  (ac-dcd-build-complete-args (ac-dcd-cursor-position))
+		  '("-l")
+		  (list (buffer-file-name))))
+		(buf (get-buffer-create ac-dcd-output-buffer-name)))
+	(with-current-buffer
+		buf (erase-buffer)
+		(apply 'call-process ac-dcd-executable nil buf nil args))
+	(let ((output (with-current-buffer buf (buffer-string))))
+	  output)))
+
+(defun ac-dcd-parse-output-for-get-symbol-declaration ()
+  "Parse output of `ac-dcd-get-symbol-declaration'.
+output is just like following.\n
+`(cons \"PATH_TO_IMPORT/import/std/stdio.d\" \"63946\")'"
+  (let ((buf (get-buffer-create ac-dcd-output-buffer-name)))
+	(with-current-buffer buf
+	  (goto-char (point-min))
+	  (if (not (string= "Not found\n" (buffer-string)))
+		  (progn (re-search-forward (rx (submatch (* nonl)) "\t" (submatch (* nonl)) "\n"))
+				 (cons (match-string 1) (match-string 2)))
+		(cons nil nil)))
+	))
+
+
+(provide 'ac-dcd)
+;;; ac-dcd.el ends here
diff --git a/editors/textadept/modules/dmd/init.lua b/editors/textadept/modules/dmd/init.lua
index 9595bc0..1ea3ea7 100644
--- a/editors/textadept/modules/dmd/init.lua
+++ b/editors/textadept/modules/dmd/init.lua
@@ -20,7 +20,7 @@ local function autocomplete()
 	dcd.registerImages()
 	dcd.autocomplete()
 	if not buffer:auto_c_active() then
-		textadept.editing.autocomplete_word(keywords)
+		textadept.editing.autocomplete("word")
 	end
 end
 
diff --git a/libdparse b/libdparse
new file mode 160000
index 0000000..d9387eb
--- /dev/null
+++ b/libdparse
@@ -0,0 +1 @@
+Subproject commit d9387eb3b275295cd0263bdc273c4b0b63f29f98
diff --git a/modulecache.d b/modulecache.d
index d3ef1fb..5d13a84 100644
--- a/modulecache.d
+++ b/modulecache.d
@@ -135,9 +135,8 @@ struct ModuleCache
 
 
 		ACSymbol*[] symbols;
-		try
-		{
-			import core.memory;
+//		try
+//		{
 			import std.stdio;
 			import std.typecons;
 			File f = File(cachedLocation);
@@ -150,12 +149,9 @@ struct ModuleCache
 			config.fileName = cachedLocation;
 			auto parseStringCache = StringCache(StringCache.defaultBucketCount);
 			auto semanticAllocator = scoped!(CAllocatorImpl!(BlockAllocator!(1024 * 64)));
-			DynamicArray!(Token, false) tokens;
-			auto tokenRange = byToken(
+			const(Token)[] tokens = getTokensForParser(
 				(source.length >= 3 && source[0 .. 3] == "\xef\xbb\xbf"c) ? source[3 .. $] : source,
 				config, &parseStringCache);
-			foreach (t; tokenRange)
-				tokens.insert(t);
 			Mallocator.it.deallocate(source);
 
 			Module m = parseModuleSimple(tokens[], cachedLocation, semanticAllocator);
@@ -180,12 +176,12 @@ struct ModuleCache
 			typeid(Scope).destroy(third.moduleScope);
 			typeid(SemanticSymbol).destroy(third.rootSymbol);
 			symbolsAllocated += first.symbolsAllocated;
-		}
-		catch (Exception ex)
-		{
-			Log.error("Couln't parse ", location, " due to exception: ", ex.msg);
-			return [];
-		}
+//		}
+//		catch (Exception ex)
+//		{
+//			Log.error("Couln't parse ", location, " due to exception: ", ex.msg);
+//			return [];
+//		}
 		SysTime access;
 		SysTime modification;
 		getTimes(cachedLocation, access, modification);