Fix parsing of cl error messages in vim so that it differentiates between an error and warning!

vimrc

@@ -1101,23 +1101,60 @@ augroup END
 " AsyncRun status line
 let g:airline_section_error = airline#section#create_right(['%{g:asyncrun_status}'])
 
-" Display error highlighting in source after running GCC with AsyncRun
-" NOTE: error results can be cleared with <leader>cr or by hiding the build
-" result window.
+" "make" value is needed for asyncrun to work with the errormarker plugin
+" https://github.com/skywind3000/asyncrun.vim/wiki/FAQ#can-asyncrunvim-trigger-an-autocommand-quickfixcmdpost-to-get-some-plugin-like-errormaker-processing-the-content-in-quickfix-
 let g:asyncrun_auto = "make"
+
+" Error and warning gutter characters.
 let errormarker_errortext = "E"
 let errormarker_warningtext = "W"
 
-" Thanks to https://forums.handmadehero.org/index.php/forum?view=topic&catid=4&id=704#3982
-" for the error message formats
-"
-" Microsoft MSBuild errors
-set errorformat+=\\\ %#%f(%l\\\,%c):\ %m
+" Error and warning gutter character colors. See color file for the group definition.
+let errormarker_errortextgroup = "ErrorMsg"
+let errormarker_warningtextgroup = "Notices"
+
+"""""""""""""""""""""""""
+" Custom error formats
+"""""""""""""""""""""""""
+
+" @note: You can debug the error parsing by running :ShowErrorEntries
+" This will print the valid entries. You'll know parsing is correct when the
+" entries have a type, line num, error message, etc.
+
+function! s:ShowErrorEntries()
+    " Prints out valid quickfix errors.
+    redraw!
+    for l:d in getqflist()
+        if l:d.valid == 1
+            echomsg l:d
+        endif
+    endfor
+endfunction
+command -nargs=0 ShowErrorEntries call s:ShowErrorEntries()
+
+
 " Microsoft compiler: cl.exe
-set errorformat+=\\\ %#%f(%l)\ :\ %#%t%[A-z]%#\ %m
+"
+" Z:\path\main.cpp(2808): error C2220: the following warning is treated as an error
+set errorformat=\\\ %#%f(%l):\ %#%t%[A-z]%#\ %[A-z]%#%n:\ %m
+
+" Microsoft MSBuild errors
+"
+" @note I got this off the Internet and haven't tested it yet.
+"
+" Z:\path\main.cpp(2808): error C2220: the following warning is treated as an error
+set errorformat+=\\\ %#%f(%l\\,%c):\ %m
+
 " Microsoft HLSL compiler: fxc.exe
+"
+" @note I got this off the Internet and haven't tested it yet.
+" @todo Add an example
 set errorformat+=\\\ %#%f(%l\\\,%c-%*[0-9]):\ %#%t%[A-z]%#\ %m
 
+"""""""""""""""""""""""""
+" Build functions
+"""""""""""""""""""""""""
+
 function! HideBuildResultsAndClearErrors()
     RemoveErrorMarkers
     call asyncrun#quickfix_toggle(g:quickfix_pane_height, 0)