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From: Georg Bauhaus <sb463ba@l1-hrz.uni-duisburg.de>
Newsgroups: comp.lang.ada
Subject: Re: load and use a ".o" file?
Date: Sun, 28 Dec 2003 16:14:06 +0000 (UTC)
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Stephen Leake <stephen_leake@acm.org> wrote:
: Hmm. Do those compiled versions include the ability to create new code
: at runtime, where the new code is also compiled, not interpreted?

If I have understood Jon correctly, there are Lisp compilers without
an interpreter, and with the ability to load compiled code, so
I'd guess, yes. (I think I've seen the thing, too.)

For SNOBOL4, a minimal RE(P)L which runs the compiler at
run time is

read                        :<code(input ' :(read)')>
end

SPITBOL is a "true" SNOBOL4 compiler afaik, so it might offer
the same capability[*]. (If you are interested,
the :<...>  triggers a jump to the beginning of ..., which is compiled
code() from ``input ' :(read)'''; input reads what you
type, ' :(read)' is an unconditional jump to label 'read',
appended to every such input.)

 [*]From the SPITBOL description at www.snobol4.com:
"New program fragments can be compiled during
program execution...
For very complex problems, your program can "evovle" and
modify itself during execution in response to the data it is
processing. New patterns can be built during execution."