Copyright (C) 1994, Digital Equipment Corp.
Digital Internal Use Only
Created on Sat Mar 5 18:49:59 PST 1994 by najork
MODULE ObLightGO;
IMPORT LightGO, ObAux, ObBooleanProp, ObColorProp, ObCommand, ObGO, ObLib,
ObProp, ObProtoLoader, ObValue, SynLocation;
CONST
pkgname = "LightGO";
***************************************************************************
Wrapper for LightGO.T
***************************************************************************
REVEAL
T = ObGO.T BRANDED "ObLightGO.T" OBJECT END;
***************************************************************************
Setup procedures
***************************************************************************
PROCEDURE SetupPackage () =
PROCEDURE NewOpCode (name : TEXT; arity : INTEGER; code : Code) : OpCode =
BEGIN
RETURN NEW (OpCode, name := name, arity := arity, code := code);
END NewOpCode;
TYPE
OpCodes = ARRAY OF ObLib.OpCode;
VAR
opCodes: REF OpCodes;
BEGIN
opCodes := NEW (REF OpCodes, NUMBER (Code));
opCodes^ :=
OpCodes {
NewOpCode ("Color", -1, Code.Color),
NewOpCode ("Switch", -1, Code.Switch),
NewOpCode ("SetSwitch", 2, Code.SetSwitch),
NewOpCode ("SetColor", 2, Code.SetColor)
};
ObLib.Register (NEW (Package, name := pkgname, opCodes := opCodes));
ObLib.RegisterHelp (pkgname, Help);
END SetupPackage;
PROCEDURE SetupModule (loader : ObProtoLoader.T) =
BEGIN
loader.load ("LightGO.obl");
END SetupModule;
***************************************************************************
Execution machinery
***************************************************************************
TYPE
Code = {Color, Switch, SetColor, SetSwitch};
OpCode = ObLib.OpCode OBJECT
code: Code;
END;
Package = ObLib.T OBJECT
OVERRIDES
Eval := DoEval;
END;
PROCEDURE DoEval (self : Package;
opCode : ObLib.OpCode;
<* UNUSED *> arity : ObLib.OpArity;
READONLY args: ObValue.ArgArray;
<* UNUSED *> temp : BOOLEAN;
loc : SynLocation.T) : ObValue.Val
RAISES {ObValue.Error, ObValue.Exception} =
BEGIN
CASE NARROW (opCode, OpCode).code OF
| Code.Color =>
RETURN ObProp.NameToObliq (LightGO.Colour);
| Code.Switch =>
RETURN ObProp.NameToObliq (LightGO.Switch);
| Code.SetSwitch =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
b = ObBooleanProp.GetOverloadedVal(args, 2, self, opCode, loc) DO
go.setProp (LightGO.Switch.bind (b));
RETURN ObValue.valOk;
END;
| Code.SetColor =>
WITH go = ObGO.GetArg (args, 1, self, opCode, loc),
col = ObColorProp.GetOverloadedVal (args, 2, self, opCode, loc) DO
go.setProp (LightGO.Colour.bind (col));
RETURN ObValue.valOk;
END;
END;
END DoEval;
***************************************************************************
Help
***************************************************************************
PROCEDURE Help (self : ObCommand.T; arg : TEXT; <* UNUSED *> data : REFANY) =
BEGIN
ObAux.Help (self, arg, pkgname);
END Help;
BEGIN
END ObLightGO.