Subject: Re: XS: possible to have side effects? From: gtn@xxxxxxxxxxxx (Gavin Nicol) Date: Mon, 9 Jun 1997 09:28:53 -0400 |
>The fundamental idea is that expression language objects of types that can >be mutated (strings, lists and vectors) have a dynamic read-only attribute, >just as they now have a dynamic type (the PostScript language has a similar >idea). Mutating a read-only object is an error. This is an interesting idea, and, I believe workable. You could introduce aother function that, given an expression, returns a writeable copy, and have all objects be read-only by default... DSSSList info and archive: http://www.mulberrytech.com/dsssl/dssslist
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