crypto-bigint 0.4.1

Pure Rust implementation of a big integer library which has been designed from the ground-up for use in cryptographic applications. Provides constant-time, no_std-friendly implementations of modern formulas using const generics.
Documentation 
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use super::Limb;

impl Limb {
    /// Calculate the number of bits needed to represent this number.
    pub const fn bits(self) -> usize {
        Limb::BIT_SIZE - (self.0.leading_zeros() as usize)
    }
}