sp-im 0.3.0

Immutable datatypes for no_std use within Substrate
Documentation 
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

/// The branching factor of RRB-trees
pub(crate) const VECTOR_CHUNK_SIZE: usize = core::mem::size_of::<usize>() * 8;

/// The branching factor of B-trees
pub(crate) const ORD_CHUNK_SIZE: usize = core::mem::size_of::<usize>() * 8; // Must be an even number!

/// The size of per-instance memory pools if the `pool` feature is enabled.
/// This is set to 0, meaning you have to opt in to using a pool by constructing
/// with eg. `Vector::with_pool(pool)` even if the `pool` feature is enabled.
pub(crate) const POOL_SIZE: usize = 0;