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/usr/share/highlight/langDefs/io.lang is in highlight-common 3.9-1build1.

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-- Language definition generated by lang2to3

Description="IO"

Keywords={
  { Id=1,
    List={"activate", "activeCoroCount", "and", "block", "break", "catch", "chedulerSleepSeconds", "clone", "collectGarbage", "compileString", "continue", "do", "doFile", "doMessage", "doString", "else", "elseif", "exit", "for", "foreach", "forward", "getSlot", "getenv", "hasSlot", "if", "ifFalse", "ifNil", "ifTrue", "isActive", "isNil", "list", "message", "method", "or", "parent", "pass", "pause", "perform", "performWithArgList", "print", "proto", "raise", "removeSlot", "resend", "resume", "return", "self", "sender", "setSchedulerSleepSeconds", "setSlot", "shallowCopy", "slotNames", "super", "system", "then", "thisBlock", "thisContext", "thisMessage", "try", "type", "uniqueId", "updateSlot", "wait", "write", "yield"},
  },
  { Id=2,
    List={"Array", "AudioDevice", "AudioMixer", "Block", "Box", "Buffer", "CFunction", "CGI", "Color", "Curses", "DBM", "DNSResolver", "DOConnection", "DOProxy", "DOServer", "Date", "Directory", "Duration", "DynLib", "Error", "Exception", "FFT", "File", "Fnmatch", "Font", "Future", "GL", "GLE", "GLScissor", "GLU", "GLUCylinder", "GLUQuadric", "GLUSphere", "GLUT", "Host", "Image", "Importer", "LinkList", "List", "Lobby", "Locals", "MD5", "MP3Decoder", "MP3Encoder", "Map", "Message", "Movie", "NULL", "Nil", "Nop", "Notification", "Number", "Object", "OpenGL", "Point", "Protos", "Regex", "SGMLTag", "SQLite", "Server", "ShowMessage", "SleepyCat", "SleepyCatCursor", "Socket", "SocketManager", "Sound", "Soup", "Store", "String", "Tree", "UDPSender", "UPDReceiver", "URL", "User", "Warning", "WeakLink"},
  },
  { Id=4,
    Regex=[[(\w+)\s*\(]],
  },
}

Strings={
  Delimiter=[["""|'''|"|']],
}

IgnoreCase=false

Comments={
  { Block=false,
    Delimiter= { [[#\|\/\/]] },
  },
  { Block=true,
    Nested=false,
    Delimiter= { [[\/\*]],[[\*\/]],}
  }
}

Operators=[[\(|\)|\[|\]|\{|\}|\,|\;|\:|\&|\<|\>|\!|\=|\/|\*|\%|\+|\-|\^|\@|\.]]

--FIXME no default escchar param: regex(\\\d{3}|\\x\p{XDigit}{2}|\\[ntvbrfa\\\?'"])