Adding first pass at ES6 Class support

Author: amadeus

syntax/javascript.vim

@@ -42,7 +42,7 @@ syntax keyword jsArgsObj        arguments
 
 syntax region jsImportContainer      start="^\s\?import \?" end=";\|$" contains=jsModules,jsModuleWords,jsLineComment,jsComment,jsStringS,jsStringD,jsTemplateString,jsNoise,jsBlock
 
-syntax region jsExportContainer      start="^\s\?export \?" end="$" contains=jsModules,jsModuleWords,jsComment,jsTemplateString,jsStringD,jsStringS,jsRegexpString,jsNumber,jsFloat,jsThis,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsDotNotation,jsBracket,jsParen,jsFuncCall,jsUndefined,jsNan,jsKeyword,jsClass,jsStorageClass,jsPrototype,jsBuiltins,jsNoise,jsAssignmentExpr,jsArgsObj,jsBlock
+syntax region jsExportContainer      start="^\s\?export \?" end="$" contains=jsModules,jsModuleWords,jsComment,jsTemplateString,jsStringD,jsStringS,jsRegexpString,jsNumber,jsFloat,jsThis,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsDotNotation,jsBracket,jsParen,jsFuncCall,jsUndefined,jsNan,jsKeyword,jsStorageClass,jsPrototype,jsBuiltins,jsNoise,jsAssignmentExpr,jsArgsObj,jsBlock,jsClassDefinition
 
 "" JavaScript comments
 syntax keyword jsCommentTodo    TODO FIXME XXX TBD contained
@@ -131,7 +131,6 @@ syntax keyword jsConditional    if else switch
 syntax keyword jsRepeat         do while for
 syntax keyword jsLabel          case default
 syntax keyword jsKeyword        yield
-syntax keyword jsClass          extends class
 syntax keyword jsException      try catch throw finally
 syntax keyword jsAsyncKeyword   async await
 
@@ -193,12 +192,13 @@ 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,jsDecorator,jsAsyncKeyword
+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,jsArgsObj,jsDecorator,jsAsyncKeyword,jsClassDefinition
 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
-syntax region  jsBlock      matchgroup=jsBraces       start="{"  end="}"  contains=@jsAll,jsParensErrA,jsParensErrB,jsParen,jsBracket,jsBlock,jsObjectKey,@htmlPreproc fold
-syntax region  jsFuncBlock  matchgroup=jsFuncBraces   start="{"  end="}"  contains=@jsAll,jsParensErrA,jsParensErrB,jsParen,jsBracket,jsBlock,@htmlPreproc contained fold
+syntax region  jsBlock      matchgroup=jsBraces       start="{"  end="}"  contains=@jsAll,jsParensErrA,jsParensErrB,jsParen,jsBracket,jsBlock,jsObjectKey,@htmlPreproc,jsClassDefinition fold
+syntax region  jsClassBlock matchgroup=jsClassBraces  start="{"  end="}"  contains=jsFuncName,jsClassMethodDefinitions contained fold
+syntax region  jsFuncBlock  matchgroup=jsFuncBraces   start="{"  end="}"  contains=@jsAll,jsParensErrA,jsParensErrB,jsParen,jsBracket,jsBlock,@htmlPreproc,jsClassDefinition contained fold
 syntax region  jsTernaryIf  matchgroup=jsTernaryIfOperator start=+?+  end=+:+  contains=@jsExpression,jsTernaryIf
 
 "" catch errors caused by wrong parenthesis
@@ -223,6 +223,10 @@ syntax match   jsFuncArgRest    contained /\%(\.\.\.[a-zA-Z_$][0-9a-zA-Z_$]*\))/
 
 exe 'syntax match jsArrowFunction /=>/ '.(exists('g:javascript_conceal_arrow_function') ? 'conceal cchar='.g:javascript_conceal_arrow_function : '')
 
+syntax keyword jsClassKeywords extends class contained
+syntax keyword jsClassMethodDefinitions get set static contained nextgroup=jsFuncName skipwhite skipempty
+syntax match jsClassDefinition /class [a-zA-Z_$][0-9a-zA-Z_$ \n]*/  contains=jsClassKeywords nextgroup=jsClassBlock skipwhite skipempty
+
 " Define the default highlighting.
 " For version 5.7 and earlier: only when not done already
 " For version 5.8 and later: only when an item doesn't have highlighting yet
@@ -282,7 +286,7 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsOperator             Operator
   HiLink jsOf                   Operator
   HiLink jsStorageClass         StorageClass
-  HiLink jsClass                Structure
+  HiLink jsClassKeywords        Structure
   HiLink jsThis                 Special
   HiLink jsStatic               Special
   HiLink jsSuper                Special
@@ -299,6 +303,7 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsBraces               Noise
   HiLink jsFuncBraces           Noise
   HiLink jsFuncParens           Noise
+  HiLink jsClassBraces          Noise
   HiLink jsSpecial              Special
   HiLink jsTemplateVar          Special
   HiLink jsGlobalObjects        Special
@@ -320,6 +325,8 @@ if version >= 508 || !exists("did_javascript_syn_inits")
 
   HiLink jsCssStyles            Label
 
+  HiLink jsClassMethodDefinitions Type
+
   delcommand HiLink
 endif