Re: By value-result vs by reference

Dik.Winter@cwi.nl (Dik T. Winter)
Thu, 21 Apr 1994 22:49:58 GMT

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Newsgroups: comp.compilers
From: Dik.Winter@cwi.nl (Dik T. Winter)
Keywords: design
Organization: CWI, Amsterdam
References: 94-04-140
Date: Thu, 21 Apr 1994 22:49:58 GMT

guerin@iro.umontreal.ca (Frederic Guerin) writes:
  > Is there some good reason to prohibit call-by-value-result that I can't see,
  > or is it coincidental of these days ?
  >


In languages that do not prohibit aliasing call-by-value-result is wrong
in many cases. I.e. the body of a routine can access a variable through
its ref parameter, but also by other means (globals, other indirections,
etc.).
--
dik t. winter, cwi, kruislaan 413, 1098 sj amsterdam, nederland, +31205924098
home: bovenover 215, 1025 jn amsterdam, nederland; e-mail: dik@cwi.nl
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