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Trait for Upcasting / Widening #97
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I think |
BTW, nice graph! You might simplify it a bit by leaving it implicit for transitive conversions. That is, if A->B and B->C, then implicitly A->C. Hmm, I wonder if a generic impl can express that, something like:
But the existence of (don't mind me, just musing...) |
Maybe the conv crate covers this appropriately now. |
Does But I noticed nightly |
Nice! I had missed that. Please do if you want to! |
This is a spiritual successor to #28921, completing the "upcast" idea from rust-num/num#97.
The float conversions are now merged! I think there's nothing else to do here. |
Nice! |
Specialize parser for Iter=&[u8]
Should num include a trait for upcasting / widening? I.e. all numerical casts that can be performed with no loss of information. Or is this more appropriate for a separate crate?
Here's a graph of the allowed upcasts: http://i.imgur.com/foiXWWS.png (not including self loops).
scratch impl follows
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