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add a hybrid unbounded integer type to the stdlib #8635

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thestinger opened this issue Aug 20, 2013 · 3 comments
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add a hybrid unbounded integer type to the stdlib #8635

thestinger opened this issue Aug 20, 2013 · 3 comments

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@thestinger
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It would use the checked overflow traits to expand the representation to a big integer on overflow. It will be much slower than a bounded integer type, but not as slow as a big integer before overflow (but slower afterwards).

This is similar to an implementation of small vectors.
@thestinger thestinger mentioned this issue Aug 20, 2013
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@alexcrichton
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This might belong better in libextra instead of libstd. Plus there's already a bigint in there which could be used for the "extra large" integers for this.

@thestinger thestinger mentioned this issue Sep 24, 2013
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@thestinger
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Blocked by #11536.

@thestinger
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I don't think we should include big integers in the standard library if it's not a competitive implementation. As the only realistic option is GMP and it isn't viewed as acceptable, I no longer want to do this.

@l0kod l0kod mentioned this issue Sep 6, 2014
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flip1995 pushed a commit to flip1995/rust that referenced this issue Apr 7, 2022
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Auto merge of rust-lang#8635 - pbor:unsigned-abs, r=giraffate
574bf88 
Add a lint to detect cast to unsigned for abs() and suggest unsigned_…

…abs()

changelog: Add a [`cast_abs_to_unsigned`] that checks for uses of `abs()` that are cast to the corresponding unsigned integer type and suggest to replace them with `unsigned_abs()`.
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@alexcrichton @thestinger