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Rollup merge of #76481 - moonheart08:vec_deque_constify, r=sfackler

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Convert repetitive target_pointer_width checks to const solution.

Simply a quick code tidying change. Not sure if more needs to be said.
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Tyler Mandry 2020-09-09 15:05:56 -07:00 committed by GitHub
commit 0d20cf8568
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1 changed files with 2 additions and 6 deletions
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8
library/alloc/src/collections/vec_deque.rs
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@ -32,12 +32,8 @@ mod tests;
const INITIAL_CAPACITY: usize = 7; // 2^3 - 1
const MINIMUM_CAPACITY: usize = 1; // 2 - 1
#[cfg(target_pointer_width = "16")]
const MAXIMUM_ZST_CAPACITY: usize = 1 << (16 - 1); // Largest possible power of two
#[cfg(target_pointer_width = "32")]
const MAXIMUM_ZST_CAPACITY: usize = 1 << (32 - 1); // Largest possible power of two
#[cfg(target_pointer_width = "64")]
const MAXIMUM_ZST_CAPACITY: usize = 1 << (64 - 1); // Largest possible power of two
const MAXIMUM_ZST_CAPACITY: usize = 1 << (core::mem::size_of::<usize>() * 8 - 1); // Largest possible power of two
/// A double-ended queue implemented with a growable ring buffer.
///