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Re: How to handle qualified identifiers such as x.y in a Pascal-like language

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noitalmost <noitalmost@cox.net> wrote:
>
>I looked at Aho's description of displays. Currently, my interpreter
>is using a more abstract stack. It's a stack of pointers, so the first
>declared variable in a scope goes at frame offset 0, the second at
>offset 1, etc. I was thinking of dedicating offset 0 to be a pointer
>to all the bookkeeping info, such as enclosing scope pointers. Will
>this work as my language matures, or are there some glaring gotchas?

The paper on the implementation of Lua 5.0 describes how it deals with
references to variables in outer scopes.
http://www.lua.org/doc/jucs05.pdf
Lua keeps book-keeping information outside the main evaluation stack;
there's a parallel stack of procedure invocation records, and function
closures are stored on the heap.

Tony.
--
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/

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How to handle qualified identifiers such as x.y in a Pascal-like language noitalmost <noitalmost@cox.net> - 2011-06-20 15:43 -0400
  Re: How to handle qualified identifiers such as x.y in a Pascal-like language torbenm@diku.dk (Torben Ægidius Mogensen) - 2011-06-22 10:57 +0200
  Re: How to handle qualified identifiers such as x.y in a Pascal-like language Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2011-06-22 11:47 +0100
    Re: How to handle qualified identifiers such as x.y in a Pascal-like language George Neuner <gneuner2@comcast.net> - 2011-06-24 18:13 -0400
      Re: How to handle qualified identifiers such as x.y in a Pascal-like language BGB <cr88192@hotmail.com> - 2011-06-29 12:31 -0700
        Re: How to handle qualified identifiers such as x.y in a Pascal-like language BGB <cr88192@hotmail.com> - 2011-07-01 12:46 -0700
        Re: How to handle qualified identifiers such as x.y in a Pascal-like language anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-07-02 17:13 +0000
          Re: How to handle qualified identifiers such as x.y in a Pascal-like language BGB <cr88192@hotmail.com> - 2011-07-03 13:14 -0700
            Re: How to handle qualified identifiers such as x.y in a Pascal-like language torbenm@diku.dk (Torben Ægidius Mogensen) - 2011-07-07 10:27 +0200
            Re: How to handle qualified identifiers such as x.y in a Pascal-like language BGB <cr88192@hotmail.com> - 2011-07-07 04:14 -0700
        Re: How to handle qualified identifiers such as x.y in a Pascal-like language George Neuner <gneuner2@comcast.net> - 2011-07-02 16:58 -0400
  Re: How to handle qualified identifiers such as x.y in a Pascal-like language Gene <gene.ressler@gmail.com> - 2011-06-22 19:21 -0700
    Re: How to handle qualified identifiers such as x.y in a Pascal-like language Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2011-06-24 07:56 +0100
      Re: How to handle qualified identifiers such as x.y in a Pascal-like language Gene <gene.ressler@gmail.com> - 2011-06-24 19:19 -0700
        Re: How to handle qualified identifiers such as x.y in a Pascal-like language Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2011-06-25 11:55 +0100
          Re: How to handle qualified identifiers such as x.y in a Pascal-like language noitalmost <noitalmost@cox.net> - 2011-06-29 13:13 -0400
    Re: How to handle qualified identifiers such as x.y in a Pascal-like language "[Linux Magazine]" <uu3kw29sb7@snkmail.com> - 2011-06-24 13:58 +0200
      Re: How to handle qualified identifiers such as x.y in a Pascal-like language George Neuner <gneuner2@comcast.net> - 2011-06-25 17:11 -0400
  Re: How to handle qualified identifiers such as x.y in a Pascal-like language noitalmost <noitalmost@cox.net> - 2011-06-23 12:43 -0400
    Re: How to handle qualified identifiers such as x.y in a Pascal-like language Tony Finch <dot@dotat.at> - 2011-06-29 18:55 +0100
    Re: How to handle qualified identifiers such as x.y in a Pascal-like language BGB <cr88192@hotmail.com> - 2011-06-29 15:51 -0700

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