Add jsonc, closes #635

syntax/jsonc.vim

@@ -0,0 +1,61 @@
+if has_key(g:polyglot_is_disabled, 'jsonc')
+  finish
+endif
+
+" Syntax setup {{{1
+if exists('b:current_syntax') && b:current_syntax == 'jsonc'
+  finish
+endif
+
+" Syntax: Strings {{{1
+syn region  jsoncString    start=+"+  skip=+\\\\\|\\"+  end=+"+  contains=jsoncEscape
+syn region  jsoncString    start=+'+  skip=+\\\\\|\\'+  end=+'+  contains=jsoncEscape
+
+" Syntax: JSON Keywords {{{1
+" Separated into a match and region because a region by itself is always greedy
+syn match  jsoncKeywordMatch /"\([^"]\|\\\"\)\+"[[:blank:]\r\n]*\:/ contains=jsonKeyword
+
+" Syntax: Escape sequences
+syn match   jsoncEscape    "\\["\\/bfnrt]" contained
+syn match   jsoncEscape    "\\u\x\{4}" contained
+
+" Syntax: Numbers {{{1
+syn match   jsoncNumber    "-\=\<\%(0\|[1-9]\d*\)\%(\.\d\+\)\=\%([eE][-+]\=\d\+\)\=\>"
+syn keyword jsoncNumber    Infinity -Infinity
+
+" Syntax: An integer part of 0 followed by other digits is not allowed.
+syn match   jsoncNumError  "-\=\<0\d\.\d*\>"
+
+" Syntax: Boolean {{{1
+syn keyword jsoncBoolean   true false
+
+" Syntax: Null {{{1
+syn keyword jsoncNull      null
+
+" Syntax: Braces {{{1
+syn match   jsoncBraces	   "[{}\[\]]"
+syn match   jsoncObjAssign /@\?\%(\I\|\$\)\%(\i\|\$\)*\s*\ze::\@!/
+
+" Syntax: Comment {{{1
+syn region  jsoncLineComment    start=+\/\/+ end=+$+ keepend
+syn region  jsoncLineComment    start=+^\s*\/\/+ skip=+\n\s*\/\/+ end=+$+ keepend fold
+syn region  jsoncComment        start="/\*"  end="\*/" fold
+
+" Define the default highlighting. {{{1
+hi def link jsoncString             String
+hi def link jsoncObjAssign          Identifier
+hi def link jsoncEscape             Special
+hi def link jsoncNumber             Number
+hi def link jsoncBraces             Operator
+hi def link jsoncNull               Function
+hi def link jsoncBoolean            Boolean
+hi def link jsoncLineComment        Comment
+hi def link jsoncComment            Comment
+hi def link jsoncNumError           Error
+hi def link jsoncKeywordMatch       Label
+
+if !exists('b:current_syntax')
+  let b:current_syntax = 'jsonc'
+endif
+
+" vim: fdm=marker