Adding support for ES7/ES2016 decorators

Author: glortho

syntax/javascript.vim

@@ -107,6 +107,8 @@ syntax keyword jsNumber           Infinity
 syntax match   jsFloat            /\<-\=\%(\d\+\.\d\+\|\d\+\.\|\.\d\+\)\%([eE][+-]\=\d\+\)\=\>/
 syntax match   jsObjectKey        /\<[a-zA-Z_$][0-9a-zA-Z_$]*\>\(\s*:\)\@=/ contains=jsFunctionKey contained
 syntax match   jsFunctionKey      /\<[a-zA-Z_$][0-9a-zA-Z_$]*\>\(\s*:\s*function\s*\)\@=/ contained
+syntax match   jsDecorator        "@" display contains=jsDecoratorFunction nextgroup=jsDecoratorFunction skipwhite
+syntax match   jsDecoratorFunction "[a-zA-Z_][a-zA-Z0-9_.]*" display contained nextgroup=jsFunc skipwhite
 
 syntax match   jsAssignmentExpr     /\v%([a-zA-Z_$]\k*\.)*[a-zA-Z_$]\k*\s*\=\(>\)\@!/ contains=jsFuncAssignExpr,jsAssignExpIdent,jsPrototype,jsOperator,jsThis,jsNoise,jsArgsObj
 syntax match   jsAssignExpIdent     /\v[a-zA-Z_$]\k*\ze%(\s*\=)/ contained
@@ -190,7 +192,7 @@ endif "DOM/HTML/CSS
 "" end DOM/HTML/CSS specified things
 
 "" Code blocks
-syntax cluster jsExpression contains=jsComment,jsLineComment,jsBlockComment,jsTaggedTemplate,jsTemplateString,jsStringD,jsStringS,jsRegexpString,jsNumber,jsFloat,jsThis,jsStatic,jsSuper,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsFutureKeys,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsDotNotation,jsBracket,jsParen,jsBlock,jsFuncCall,jsUndefined,jsNan,jsKeyword,jsStorageClass,jsPrototype,jsBuiltins,jsNoise,jsCommonJS,jsAssignmentExpr,jsImportContainer,jsExportContainer,jsClass,jsArgsObj
+syntax cluster jsExpression contains=jsComment,jsLineComment,jsBlockComment,jsTaggedTemplate,jsTemplateString,jsStringD,jsStringS,jsRegexpString,jsNumber,jsFloat,jsThis,jsStatic,jsSuper,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsFutureKeys,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsDotNotation,jsBracket,jsParen,jsBlock,jsFuncCall,jsUndefined,jsNan,jsKeyword,jsStorageClass,jsPrototype,jsBuiltins,jsNoise,jsCommonJS,jsAssignmentExpr,jsImportContainer,jsExportContainer,jsClass,jsArgsObj,jsDecorator
 syntax cluster jsAll        contains=@jsExpression,jsLabel,jsConditional,jsRepeat,jsReturn,jsStatement,jsTernaryIf,jsException
 syntax region  jsBracket    matchgroup=jsBrackets     start="\[" end="\]" contains=@jsAll,jsParensErrB,jsParensErrC,jsBracket,jsParen,jsBlock,@htmlPreproc fold
 syntax region  jsParen      matchgroup=jsParens       start="("  end=")"  contains=@jsAll,jsOf,jsParensErrA,jsParensErrC,jsParen,jsBracket,jsBlock,@htmlPreproc fold
@@ -303,6 +305,7 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsBuiltins             Special
   HiLink jsModules              Include
   HiLink jsModuleWords          Include
+  HiLink jsDecorator            Special
 
   HiLink jsDomErrNo             Constant
   HiLink jsDomNodeConsts        Constant