anchor.diff:  goto parse_cmdline_options
   :end_parsing_cmdline_options
   
  +if %clean% == 0 (
   if %build_librime% == 0 (
   if %build_boost% == 0 (
   if %build_thirdparty% == 0 (
     set build_librime=1
  -)))
  +))))
  +
  +if %clean% == 1 (
  +  rmdir /s /q build
  +  rmdir /s /q thirdparty\src\capnproto\build
  +  rmdir /s /q thirdparty\src\glog\cmake-build
  +  rmdir /s /q thirdparty\src\googletest\build
  +  rmdir /s /q thirdparty\src\leveldb\build
  +  rmdir /s /q thirdparty\src\marisa-trie\build
  +  rmdir /s /q thirdparty\src\opencc\build
  +  rmdir /s /q thirdparty\src\yaml-cpp\build
  +)
   
   set build_dir=%build_dir_base%%build_dir_suffix%
   
  
positive.code:   set PLATFORM_TOOLSET=v141_xp
  )
  
  set build_dir_base=build
  set build_dir_suffix=
  set build_config=Release
  
negative.code: 
  :parse_cmdline_options
  if "%1" == "" goto end_parsing_cmdline_options
  if "%1" == "clean" set clean=1
  if "%1" == "boost" set build_boost=1
  if "%1" == "boost_x64" (
    set build_boost=1
  