Add support for Vera++ C++ checker

This commit adds support for Vera++ C++ style checker, using its ability to export to cppstyle format, and then based on the checkstyle checker.

syntax_checkers/cpp/verapp.vim

@@ -0,0 +1,48 @@
+"============================================================================
+"File:        verapp.vim
+"Description: Syntax checking plugin for syntastic.vim
+"Maintainer:  Lucas Verney <phyks@phyks.me>
+"License:     This program is free software. It comes without any warranty,
+"             to the extent permitted by applicable law. You can redistribute
+"             it and/or modify it under the terms of the Do What The Fuck You
+"             Want To Public License, Version 2, as published by Sam Hocevar.
+"             See http://sam.zoy.org/wtfpl/COPYING for more details.
+"
+" Tested with Vera++ 1.3.0
+"============================================================================
+
+if exists('g:loaded_syntastic_cpp_verapp_checker')
+    finish
+endif
+let g:loaded_syntastic_cpp_verapp_checker = 1
+
+if !exists('g:syntastic_verapp_config_file')
+    let g:syntastic_verapp_config_file = '.syntastic_verapp_config'
+endif
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_cpp_verapp_GetLocList() dict
+    let makeprg = self.makeprgBuild({
+        \ 'args': syntastic#c#ReadConfig(g:syntastic_verapp_config_file),
+        \ 'args_after': '--show-rule --no-duplicate -S -c -' })
+
+    let errorformat = '%f:%t:%l:%c:%m'
+
+    return SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat,
+        \ 'preprocess': 'checkstyle',
+        \ 'subtype': 'Style' })
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'cpp',
+    \ 'name': 'verapp',
+    \ 'exec': 'vera++'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo
+
+" vim: set sw=4 sts=4 et fdm=marker: