Module std::num::bignum
[−]
[src]
Unstable (
core_private_bignum
): internal routines only exposed for testing
Custom arbitrary-precision number (bignum) implementation.
This is designed to avoid the heap allocation at expense of stack memory.
The most used bignum type, Big32x40
, is limited by 32 × 40 = 1,280 bits
and will take at most 160 bytes of stack memory. This is more than enough
for round-tripping all possible finite f64
values.
In principle it is possible to have multiple bignum types for different inputs, but we don't do so to avoid the code bloat. Each bignum is still tracked for the actual usages, so it normally doesn't matter.
Modules
tests | [Unstable] |
Structs
Big32x40 |
[Unstable] Stack-allocated arbitrary-precision (up to certain limit) integer. |
Traits
FullOps |
[Unstable] Arithmetic operations required by bignums. |
Type Definitions
Digit32 | [Unstable] |