[Jscheme-devel] Modules, Macros, and Eval in Jscheme

[Timothy H. <tim...@ma...>]

One more small change.... I've modified DynamicEnvironment.java so that
when a new environment is imported, it only imports those variables whose
names do not contain ":"  under the assumption that such variables were 
themselves
created by a higher level environment import.

We could require import prefixes to end in a ":" or we could just use 
the colon to
indicate variables that should not be exported, e.g.
   (define (local:f x) {This is a non-exported function with parameter 
[x]})
With this model the user would be responsible for picking import 
prefixes that
didn't cause name clashes...

Also, on the topic of first class environments and languages, this might 
not be
a bad idea if they have a limited API because a compiler will need to be 
able to
compile a particular module in a particular dynamic environment 
(obtained by
executing all of the requisite (language-import FILE) expressions) to 
get the
proper semantics for the macros... Thus, we need to at least be able to 
specify that
a certain macro expansion should take place in a specified environment...

---Tim---


here is the latest version of Dynamic Environment (that doesn't import 
symbols containing
a colon in their string representation):