You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: standard.rs
    path of file: ./repos/snarkVM/algorithms/src/msm/variable_base
    
    the code of the file until where you have to start completion: // Copyright (C) 2019-2023 Aleo Systems Inc.
// This file is part of the snarkVM library.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or im
    
pub fn msm<G: AffineCurve>(bases: &[G], scalars: &[<G::ScalarField as PrimeField>::BigInteger]) -> G::Projective {
    // Determine the bucket size `c` (chosen empirically).
    let c = match scalars.len() < 32 {
        true => 1,
        false => crate::msm::ln_without_floats(scalars.len()) + 2,
    };

    let num_bits = <G::ScalarField as PrimeField>::size_in_bits();

    // Each window is of size `c`.
    // We divide up the bits 0..num_bits into windows of size `c`, and
    // in parallel process each such window.
    let window_sums: Vec<_> =
        cfg_into_iter!(0..num_bits).step_by(c).map(|w_start| standard_window(bases, scalars, w_start, c)).collect();

    // We store the sum for the lowest window.
    let (lowest, window_sums) = window_sums.split_first().unwrap();

    // We're traversing windows from high to low.
    window_sums.iter().rev().fold(G::Projective::zero(), |mut total, (sum_i, window_size)| {
        total += sum_i;
        for _ in 0..*window_size {
            total.double_in_place();
        }
        total
    }) + lowest.0
}