kateveni@Shasta (05/20/84)
From: Manolis Katevenis <kateveni@Shasta>
Mias kai i polli syzitisi peri tis glwssas programmatismou gia to
HY240 (domes deomenwn) moiazei na echei kopasei, giati na min xeki-
nisoume mian alli syzitisi, panw s' ena schetiko -- alla kai pio
spoudaio (kai pio megalo) -- thema:
Poia prepei na einai i protimitea glwssa programmatismou
stin Ellada -- genika, gia paragwgi kai ereuna, ochi (mono)
gia ekpaideusi?
Bebaia, xeroume oti einai mallon anefikto na einai mia kai mono mia
i glwssa stin opoia oloi tha grafoun ta programmata tous, toso giati
ta programmata isws na echoun idiaiteres anagkes (p.ch. LISP), oso
kai giati yparchei auto to (kako) pragma pou leme "paradwsi" (p.ch.
tha einai arketa dyskolo na peisoume kamposous na papsoun na grafoun
se FORTRAN kai se COBOL...). Ap' tin alli meria omws, episis xeroume
tin megali simasia tis protypopoiisis (standardization), kai posa
polla problimata tha lythoun an enas megalos ogkos apo to kainourgio
software pou th' archisei na grafetai stin Ellada, grafetai se mia,
tin idia, kali glwssa.
Mallon anapofeukta, nomizw, i syzitisi mas tha prepei na piasei kai
to schetiko problima tou "genika protimiteou" "periballontos", dil.
leitourgikou systimatos (O.S.), klp.
Sto deutero thema, isws i apantisi na einai eukoloteri: to UNIX exe-
lisetai grigora (an den echei ki'olas exelichthei) se schedon genika
apodekto (pagkosmia) "protypo" (standard) leitourgiko systima. Isws
"protypo" na einai mia kakia lexi -- na to pw alloiws: polys kosmos
grafei poly, endiaferon, kai genika prosito software pou trechei se
systimata UNIX. Kata ti gnwmi mou, ekei prepei na prosanatolistoume
oson afora to "periballon".
O parapanw prosanatolismos sto deutero thema, piezei pros orismeni
kateuthinsi sto prwto: tin glwssa C .... Auti loipon, para tis ady-
namies tis, einai enas geros ypopsifios, logw akribws tou thematos
tis pagkosmias (kai pan-UNIX-ikis symbibastotitas (compatibility)).
Alloi ypopsifioi?
-- PASCAL ? Den nomizw oti i Pascal mporei na apotelesei glwssa gia
anaptixi megalwn, sobarwn systimatwn. Den echei chwristi compilation,
echei mi euelikto I/O, kai friktous strings charaktirwn.
-- ADA ? Echei tis prooptikes (H: kapoies prooptikes...) na ginei
ena kainourgio diethnes standard, alla kapws pairnw tin entypwsi oti
oloi tin thewroun idiaitera ws fobera dyskoli na ginei compiled....
-- MODULA-2 ? Na mia glwssa gia tin opoia den xerw arketa, pou omws
fantazei ston orizonta san endiaferousa gia tous skopous mas. Para-
thetw to abstract enos seminariou apo ton Mike Powell -- ikanotato
programmatisti, kai kathigiti se Leitourgika Systimata sto Berkeley:
COMPUTER SCIENCE COLLOQUIUM Terman Auditorium
4:15pm Tuesday, May 8, 1984
A COMPILER FOR MODULA-2
Michael L. Powell
Digital Equipment Corporation
Western Research Laboratory
A common complaint about new programming languages is
that their compilers are poor. When we decided to use
Modula-2 as an implementation language, we considered high
quality code, a usable language, and a retargetable compiler
to be important. We were also in a hurry.
We have built a Modula-2 compiler that has a simple,
machine independent optimizer in the front end, and a sim-
ple, language independent peephole optimizer in the back
end. The optimizer is based on the philosophy of "best sim-
ple", which attempts to do a good job without working too
hard. Benchmark results show that the code quality is com-
parable to or better than more complex compilers.
The compiler includes an intermodule checker that com-
piles out of date modules based on actual dependencies
rather than time stamps, resulting in the minimum necessary
recompilation. Modula-2 routines can easily be mixed with C
and Pascal routines under Unix. The compiler was developed
quickly using available tools and technology.
Episis, rwtisa kai ematha oti me simantika megali sigouria tha
yparchei compiler tis Modula-2 gia 68000 (dil. SUN workstation)
sto telos tou fetinou kalokairiou.
Alles glwsses? Poios xerie na mas pei?
Symperasma? Me tis elleipeis gnwseis pou echw panw se glwsses
programmatismou, egw briskw tin C kai tin Modula-2 san tis kaly-
teres ypopsifies.
Alles gnwmes ????????????????????????????????????????????????????
Chairetismous,
Manolis.