Replace conditions with dynamically scoped variables

[rust-highfive]

Issue by brson
Friday Nov 22, 2013 at 03:59 GMT

For earlier discussion, see rust-lang/rust#10602

This issue was labelled with: A-libs, B-RFC, P-low in the Rust repository

---

Conditions are a special case of dynamic scope, and the few conditions we have in std that make sense, like not_utf8 could simply be represented as a dynamic variable that represents the standard schemes for coping with unicode errors: failure, deletion, replacement char.

Nominating.

[alexcrichton]

Conditions have long since been removed, so closing.

[pnkfelix]

Weren't there some use cases for dynamic variables that we were still interested in supporting? I vaguely recall discussion of this at some work week some time ago...

[alexcrichton]

Perhaps? This is such an old issue I suspect that we would want to reopen a new one anyway though.

[pnkfelix]

Fair enough. :)