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Add size_of, size_of_val, align_of, and align_of_val to the prelude

Many, many projects use `size_of` to get the size of a type. However,
it's also often equally easy to hardcode a size (e.g. `8` instead of
`size_of::<u64>()`). Minimizing friction in the use of `size_of` helps
ensure that people use it and make code more self-documenting.

The name `size_of` is unambiguous: the name alone, without any prefix or
path, is self-explanatory and unmistakeable for any other functionality.
Adding it to the prelude cannot produce any name conflicts, as any local
definition will silently shadow the one from the prelude. Thus, we don't
need to wait for a new edition prelude to add it.

Add `size_of_val`, `align_of`, and `align_of_val` as well, with similar
justification: widely useful, self-explanatory, unmistakeable for
anything else, won't produce conflicts.
This commit is contained in:
Josh Triplett 2024-03-28 14:30:32 +00:00
parent 6be7b0c7d2
commit a5a60d75a8
18 changed files with 22 additions and 23 deletions

View file

@ -7,7 +7,6 @@
use std::collections::HashMap;
use std::hash::BuildHasherDefault;
use std::hash::Hasher;
use std::mem::size_of;
use std::ops::BitXor;
/// Type alias for a hashmap using the `fx` hash algorithm.