Finding the instance reference of an object
greg at cosc.canterbury.ac.nz
Fri Oct 31 09:03:15 CET 2008
Douglas Alan wrote:
> greg <greg at cosc.canterbury.ac.nz> writes:
>>This holds for *all* languages that I know about, both
>>static and dynamic.
> Then you don't know about all that many languages. There are
> languages that use call-by-name, and those that use
> call-by-value-return. Some use call-by-need and others do
> call-by-macro-expansion. Etc.
I didn't mean that these are the only two parameter passing
mechanisms in existence -- I know there are others.
What I mean is that in all languages I know of that have
by-value or by-reference or both, they behave according to
the definitions I gave. If anyone has a counterexample,
I'll be interested to hear about it.
> instance, most dialects of Lisp have procedural macros. The calling
> semantics of procedural macros are quite different from the calling
> semantics of normal functions
Yes, but nobody refers to that as either by-value or
by-reference as far as I know. Lisp people would probably
talk about the parameter being passed either "evaluated"
> Lisp, and CLU all use call-by-sharing, then I have said something that
> makes a similarity among these languages easier to state and easier to
If you told me they use "assignment by sharing", that would tell me
a lot *more* about the language than just talking about parameter
More information about the Python-list