> We should take this problem seriously. ... > > Dynamic scope is very bad.
Specifically: - Classes are supposed to provide integrity, but dynamic scope makes the internals of code brittle; any variable reference inside the implementation could be subverted by the seemingly innocuous insertion of a property. - Dynamic dispatch has a reasonably understandable cost model, but only if it's confined to explicit property references. With dynamic scope, any variable reference could potentially be very expensive. - Generally, code within a `with' block is brittle and hard to understand, and as Tucker says, the implicit `this.' means that all code inside class methods is within a `with' block... this means that all code inside class methods is brittle! - In the past, this has been enough for many programmers to deprecate all use of `with' -- we should certainly hope to avoid the same happening for classes. Dave _______________________________________________ Es4-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es4-discuss
