On 1 Jun 2016 11:04 PM, "Nick Coghlan" <ncoghlan@gmail.com> wrote:
>... immutable instances, so this is likely to be better approached as a type hinting problem rather than as a runtime feature.


> The closest related concept I'm personally familiar with is const pointers and references in C and C++, so there

I think rust borrows are a likely better fit for inspiration.