corner cases for default_trait_access

[pacak]

Description

Currently for code like

let foo = Default::default();

or

foo: Default::default(),

where foo is a variable of type Option<usize>
suggests to replace it with Option::default(), which is not wrong but suggesting None would be better. Can probably be extended to some other types in stdlib.

Version

rustc 1.70.0 (90c541806 2023-05-31)
binary: rustc
commit-hash: 90c541806f23a127002de5b4038be731ba1458ca
commit-date: 2023-05-31
host: x86_64-unknown-linux-gnu
release: 1.70.0
LLVM version: 16.0.2

Additional Labels

No response

[Centri3]

This is reasonable, stuff like u32::default() can be replaced with 0 as well. Though just a thought, maybe this should be a separate lint?

@rustbot label +C-enhancement

[Centri3]

I've opened #10985, which should cover this.