Implicit type conversions with data loss

[bearophile]

> Languages as Ada, Delphi, C# and few others (C/C++ too, with a 
> new Clang feature) know that overflow of fixnums is a very 
> common source of bad bugs, so they offer optional run-time 
> tests to assignments and numerical operations. D too will 
> eventually need those.

A little example of the difficulties involved:
http://blog.regehr.org/archives/721

Bye,
bearophile