diff --git a/generator/cpp2ffi.lua b/generator/cpp2ffi.lua
index 15032ac..b3a3dc6 100644
--- a/generator/cpp2ffi.lua
+++ b/generator/cpp2ffi.lua
@@ -116,7 +116,7 @@ end
 M.strsplit = strsplit
 local function split_comment(line)
     local comment = line:match("(%s*//.*)") --or ""
-    line = line:gsub("%s*//.*","")
+    line = line:gsub("%s*//[^\n]*","")
     line = line:gsub("%s*$","")
     return line,comment
 end
@@ -611,6 +611,7 @@ local function clean_functypedef(line)
 	return result
 end
 local function parseFunction(self,stname,itt,namespace,locat)
+
 	local lineorig,comment = split_comment(itt.item)
 	line = clean_spaces(lineorig)
 	--move *
@@ -1130,6 +1131,9 @@ function M.Parser()
 		return par.skipped[def.ov_cimguiname] or par.skipped[def.cimguiname]
 	end
 	function par:take_lines(cmd_line,names,compiler)
+		if self.COMMENTS_GENERATION then
+			cmd_line = cmd_line .. (compiler=="cl" and " /C " or " -C ")
+		end
 		local pipe,err = io.popen(cmd_line,"r")
 		if not pipe then
 			error("could not execute COMPILER "..err)
@@ -1246,7 +1250,34 @@ function M.Parser()
 			table.insert(cdefs2,cdef[1])
 		end
 		local txt = table.concat(cdefs2,"\n")
-		
+		--clean bad positioned comments inside functionD_re
+		if self.COMMENTS_GENERATION then
+		print"cleaning comments inside functionD_re--------------"
+		---[[
+		local nn = 0
+		local txtclean = {}
+		local reg = "(\n[%w%s]-[%w]+%s*%b())(%s*//[^\n]*)([\n%s%w]*%b{}%s-;*)"
+		--reg = "^([^;{}]-%b()[\n%s%w]*%b{}%s-;*)"
+		local ini = 1
+		local i,e,a,b,c = txt:find(reg,ini)
+		while i do
+			print(i,e,#txt)
+			table.insert(txtclean,txt:sub(ini,i-1))
+			table.insert(txtclean,a)
+			print("a:",a)
+			print("b:",b)
+			print("c:",c)
+			c = c:gsub("(%s*//[^\n]*)","")
+			table.insert(txtclean,c)
+			nn = nn + 1
+			ini = e + 1
+			i,e,a,b,c = txt:find(reg,ini)
+		end
+		table.insert(txtclean,txt:sub(ini))
+		print("end cleaning ------------------------------",nn)
+		txt = table.concat(txtclean)
+		end
+		--]]
 		self.itemsarr = par:parseItemsR2(txt)
 		itemsarr = self.itemsarr
 	end
diff --git a/generator/generator.bat b/generator/generator.bat
index 1c8206b..94298f7 100644
--- a/generator/generator.bat
+++ b/generator/generator.bat
@@ -15,8 +15,8 @@ set PATH=%PATH%;C:\anima;C:\mingws\i686-7.2.0-release-posix-dwarf-rt_v5-rev1\min
 :: set PATH=%PATH%;C:\luaGL\sources\luajit-master\luajit-master\bin\mingw32;C:\mingw32\bin;
 ::process  files
 :: arg[1] compiler name gcc, clang or cl
-:: arg[2] options as words in one string: internal for imgui_internal generation, freetype for freetype generation
-:: examples: "" "internal" "internal freetype"
+:: arg[2] options as words in one string: internal for imgui_internal generation, freetype for freetype generation, comments for comments generation
+:: examples: "" "internal" "internal freetype comments"
 :: arg[3..n] name of implementations to generate and/or CFLAGS (e.g. -DIMGUI_USER_CONFIG or -DIMGUI_USE_WCHAR32)
 luajit ./generator.lua gcc "internal" glfw opengl3 opengl2 sdl
 
diff --git a/generator/generator.lua b/generator/generator.lua
index b1b8986..3738e01 100644
--- a/generator/generator.lua
+++ b/generator/generator.lua
@@ -32,10 +32,10 @@ if FREETYPE_GENERATION then
 end
 
 if COMPILER == "gcc" or COMPILER == "clang" then
-    CPRE = COMPILER..(COMMENTS_GENERATION and " -C " or "")..[[ -E -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -DIMGUI_API="" -DIMGUI_IMPL_API="" ]] .. CFLAGS
+    CPRE = COMPILER..[[ -E -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -DIMGUI_API="" -DIMGUI_IMPL_API="" ]] .. CFLAGS
     CTEST = COMPILER.." --version"
 elseif COMPILER == "cl" then
-    CPRE = COMPILER..(COMMENTS_GENERATION and " /C " or "")..[[ /E /DIMGUI_DISABLE_OBSOLETE_FUNCTIONS /DIMGUI_DEBUG_PARANOID /DIMGUI_API="" /DIMGUI_IMPL_API="" ]] .. CFLAGS
+    CPRE = COMPILER..[[ /E /DIMGUI_DISABLE_OBSOLETE_FUNCTIONS /DIMGUI_DEBUG_PARANOID /DIMGUI_API="" /DIMGUI_IMPL_API="" ]] .. CFLAGS
     CTEST = COMPILER
 else
     print("Working without compiler ")
@@ -352,7 +352,7 @@ local function parseImGuiHeader(header,names)
 	parser.manuals = cimgui_manuals
 	parser.UDTs = {"ImVec2","ImVec4","ImColor","ImRect"}
 	--parser.gen_template_typedef = gen_template_typedef --use auto
-	
+	parser.COMMENTS_GENERATION = COMMENTS_GENERATION
 	local defines = parser:take_lines(CPRE..header,names,COMPILER)
 	
 	return parser