Add dlang support, closes #401

syntax/dcov.vim

@@ -0,0 +1,55 @@
+if exists('g:polyglot_disabled') && index(g:polyglot_disabled, 'dlang') != -1
+  finish
+endif
+
+" Vim syntax file for coverage information for the reference compiler (DMD) of
+" the D programming language.
+"
+" Language:     dcov (dlang coverage testing output)
+" Maintainer:   Jesse Phillips <Jesse.K.Phillips+D@gmail.com>
+" Last Change:  2015-07-10
+"
+" Contributors:
+"   - Joakim Brannstrom <joakim.brannstrom@gmx.com>
+"
+" Please submit bugs/comments/suggestions to the github repo:
+" https://github.com/JesseKPhillips/d.vim
+
+" Quit when a (custom) syntax file was already loaded
+if exists("b:current_syntax")
+  finish
+endif
+
+" Provide highlight of D code.
+runtime! syntax/d.vim
+unlet b:current_syntax
+
+" Source lines
+syn match dcovCode              "^\s*|"
+syn match dcovExecuted          "^\s*\d\+|"
+syn match dcovNotExecuted       "^\s*0\+|"
+
+" Coverage statistic
+" 0% is critical
+" 1-39% is low
+" 40-99 is partial
+" 100% is complete
+syn match dcovFile              contained "^.\{-}\s\+\( is \)\@!"
+syn match dcovPartial           contained "\d\+% cov\w*"
+syn match dcovFull              contained "100% cov\w*"
+syn match dcovLow               contained "[1-3]\=\d\=% cov\w*"
+syn match dcovNone              contained "0% cov\w*"
+syn match dcovStat              "^\(.\{0,7}|\)\@!.*$" contains=dcovFull,dcovPartial,dcovNone,dcovFile,dcovLow
+
+" Define the default highlighting.
+" Only used when an item doesn't have highlighting yet
+hi def link dcovNotExecuted             Constant
+hi def link dcovExecuted                Type
+hi def link dcovCode                    Comment
+hi def link dcovFull                    PreProc
+hi def link dcovFile                    Identifier
+hi def link dcovNone                    Error
+hi def link dcovLow                     Operator
+hi def link dcovPartial                 Structure
+
+let b:current_syntax = "dcov"