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Paolo Amoroso
@amoroso@oldbytes.space  ·  activity timestamp 3 days ago
@weekend_editor Interlisp had read macros in the 1970s too.

@vnikolov @screwlisp @BobKerns

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Vassil Nikolov
@vnikolov@ieji.de replied  ·  activity timestamp 3 days ago

Right, thanks.
Do you know off the top of your head
when Interlisp acquired specifically such markers for shared structure (circularity etc.)?
(Like Common Lisp's #n= and #n#, but I don't know its particular syntax.)

#Lisp

@amoroso @weekend_editor @screwlisp @BobKerns

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Paolo Amoroso
@amoroso@oldbytes.space replied  ·  activity timestamp 3 days ago
@vnikolov The 1974 edition of the Interlisp Reference Manual introduces this notation for circular structures:

http://lispm.de/docs/Publications/Lisp%20Language%20Manuals/1974%20Interlisp%20RefMan.pdf#page=505

@weekend_editor @screwlisp @BobKerns

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Vassil Nikolov
@vnikolov@ieji.de replied  ·  activity timestamp 3 days ago
@amoroso

Thank you!
I found it in section 21.7.
[Of the Interlisp Reference Manual, 1974.]
The notation there is with asterisks.
Besides "circular", their terminology uses "reentrant", rather than "shared".

I find the speed at which such things historically evolved interesting.

#Lisp

@weekend_editor @screwlisp @BobKerns

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Paolo Amoroso
@amoroso@oldbytes.space replied  ·  activity timestamp 3 days ago
@vnikolov I'm afraid not.

@weekend_editor @screwlisp @BobKerns

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