syn keyword FiddlePackage option package nextgroup=FiddleName skipwhite
syn keyword FiddleDecl reg buffer instance at location reserved nextgroup=FiddleIdent skipwhite
syn keyword FiddleTypeDecl type regtype bits nextgroup=FiddleIdent skipwhite
syn keyword FiddleEnum enum
syn keyword FiddleBuiltin assert_pos skip_to
syn keyword FiddleModifier wo ro rw
syn keyword FiddleStorageClass struct union bitstruct bitunion

syn match FiddleUsing +using+ nextgroup=FiddleName skipwhite

syn match FiddleColon +:+ skipwhite nextgroup=FiddleContainedType
syn match FiddleContainedType +[a-zA-Z0-9_.]\++ contained
syn match FiddleName +\<[a-zA-Z0-9_.]\+\>+ contained

syn match FiddleIdent +[A-Za-z0-9_]\++ contained

syn match FiddleComment +\/\/.*$+
syn region FiddleDocComment start=+/\*\*+ end=+*/+
syn region FiddleString start=+"+ end=+"+ skip=+\\.+

syn region FiddleDirective start=+\[\[+ end=+\]\]+ contains=FiddleString

syn match FiddleNumber +\<[0-9_]\+\([xb]\)\@!\|0x[0-9A-Fa-f][0-9A-Fa-f_]*\|0b[01]\+\>+

syn match FiddleImport +import+ nextgroup=FiddleImportString skipwhite
syn region FiddleImportString start=+"+ end=+"+ skip=+\\.+ skipwhite nextgroup=FiddleImportList contained
syn region FiddleImportList   start=+(+ end=+)+ skipwhite contained contains=FiddleImportValue
syn match FiddleImportValue +[a-zA-Z0-9_]\++ contained

hi! link FiddleImportString FiddleString
hi! link FiddleImportList PreProc
hi! link FiddleImportValue Type
hi! link FiddleImport FiddleStorageClass

hi! link FiddleString String
hi! link FiddleDirective PreProc
hi! link FiddleContainedType Type
hi! link FiddleModifier StorageClass
hi! link FiddleUsing StorageClass
hi! link FiddleBuiltin Function
hi! link FiddleEnum StorageClass
hi! link FiddleStorageClass FiddleEnum
hi! link FiddleDecl Type
hi! link FiddleNumber Number
hi! link FiddleDocComment Comment
hi! link FiddleComment Comment
hi! link FiddlePackage Include
hi! link FiddleTypeDecl StorageClass
hi! link FiddleIdent Identifier
hi! link FiddleName Identifier