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Language/OS - Multiplatform Resource Library
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LANGUAGE OS.iso
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gc3.ps
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Encapsulated PostScript
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1993-07-23
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99KB
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522x905
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8-bit (46 colors)
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OCR:
addressiisitruncatedibyianiassignmentiofiaiT*iintoiaiU*i(suchiasioniaiword-addressedimachine), theitruncatediaddressistillirefersitoitheioriginalicollectediobject. Most,iperhapsiall, iimplementationsiofinewiandima11ocialreadyibehaveithisiway.iThough theiARMiisisilentionitheiissue,ireturningimaximallyialignedistorageiisirequireditoiimplement overloadingiofioperator Whew AistrongerinotioniofitypeivalidityiwouldirequireithatiaivariableiofitypeiT*icontainsiaipointer toiaivalueiofitypei ioriaiclassiderivedifromi iWeiknowiofionlyioneigarbage-collectionitechnique thatibenefitsifromistrongitypeivalidity.iThis itechniqueiusesitheideclareditypesiofipointersito determineitheitypesiofiobjectsiinitheiheapiratherithanitaggingitheiobjectsithemselves,isavingithe spaceioverheadiofitheitags.iButithisitechniqueidoesn'tifullyiextenditoilanguagesiwithiclass inheritance objectsioficlassitypesistillineeditoibeitagged. iAsifariasiweiknow, ithisitechniqueihas neveribeeniimplemented,iandiitsispaceisavingsiforitypicaliC++iprogramsiwouldibeinegligible. Further,ilikeipointerivalidity,istrongitypeivalidityiwouldirestricticompatibilityiwithiexisting C++icode. õ
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