anchor.diff:  
   REM ref: https://github.com/Microsoft/vswhere/wiki/Start-Developer-Command-Prompt
   
  -SET VsWherePath="C:/Program Files (x86)/Microsoft Visual Studio/Installer/vswhere.exe"
  -
   IF NOT EXIST %VsWherePath% (
   	ECHO Could not find vswhere.exe
   	EXIT /B 2
   )
   
  -SET VsWhereCmdLine="%VsWherePath% -nologo -latest -version [%VsVersionMin%,%VsVersionMax%) -property installationPath"
  +SET VsWhereCmdLine="!VsWherePath! -nologo -latest -version [%VsVersionMin%,%VsVersionMax%) -property installationPath"
   
   FOR /F "usebackq delims=" %%i in (`!VsWhereCmdLine!`) DO (
   
  
positive.code: SETLOCAL
  SETLOCAL ENABLEDELAYEDEXPANSION
  
  SET vsversion=%1
  IF "%vsversion%" == "" (
  	SET vsversion=vs2015
  )
  
  IF "%vsversion%" == "vs2010" (
  
negative.code: 
  REM ===========================================================================
  
  :BootstrapLatest
  
  IF EXIST %VsWherePath% (
  
  	REM First try for not legacy Visual Studios ( >vs2017 )
  
  	SET VsWhereCmdLine="!VsWherePath! -nologo -latest -property catalog.productLineVersion"
  
  	FOR /F "usebackq delims=" %%i in (`!VsWhereCmdLine!`) DO (
  
  		CALL %SelfPath% vs%%i
  
  		EXIT /B %ERRORLEVEL%
  	)
  
  )
  
  SET LegacyVSVersions=
  
  REM Get latest Visual Studio legacy version
  
  REM For all env var starting with VS
  FOR /F "usebackq delims==" %%i in (`SET VS`) DO (
  
  	REM Check if env var match pattern VS*COMNTOOLS (ie: VS140COMNTOOLS)
  	ECHO "%%i" | FINDSTR /R /C:VS.*COMNTOOLS >nul && (
  
  		SET "LegacyVSVersions=%%i"
  	)
  )
  
  REM Strip VS
  SET LegacyVSVersions=%LegacyVSVersions:VS=%
  REM Strip COMNTOOLS
  SET LegacyVSVersions=%LegacyVSVersions:COMNTOOLS=%
  
  SET "VsVersionMap=140-vs2015;120-vs2013;110-vs2012;100-vs2010"
  CALL SET PremakeVsVersion=%%VsVersionMap:*%LegacyVSVersions%-=%%
  SET PremakeVsVersion=%PremakeVsVersion:;=&REM.%
  
  IF NOT "%PremakeVsVersion%" == "" (
  	CALL %SelfPath% %PremakeVsVersion%
  	EXIT /B %ERRORLEVEL%
  )
  
  ECHO Could not find a Visual Studio installation
  EXIT /B 2
  
  REM :BootstrapLatest
  
  REM ===========================================================================
  
  REM SETLOCAL ENABLEDELAYEDEXPANSION
  ENDLOCAL
  REM SETLOCAL
  