[rust-dev] Warn about implicit integer conversion

Niko Matsakis niko at alum.mit.edu
Thu Dec 20 05:59:44 PST 2012

Lindsey Kuper wrote:
> Our thinking at the time we implemented suffix inference was that if
> you went so far as to write the optional type annotation, then you
> should get the type you asked for, no questions asked, overflows and
> all.  After all, sometimes people do want intentional overflow.  But
> if it's causing nasty surprises, then, yeah, it should be revisited.

I think the best thing would be a simple lint check that visits each 
literal and checks whether it can fit into the type assigned to it.  It 
will catch many simple cases like this one.


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