Remove local_inner_macros usage

[EFanZh]

Since we have dropped support for pre-1.30 compilers.

[Thomasdezeeuw]

I think this should be core.

Suggested change

	::std::format_args!($($arg)+),
	::core::format_args!($($arg)+),

[EFanZh]

Currently, log haven’t used core:: anywhere, do I want to introduce the usage here?

[Thomasdezeeuw]

Never mind, this is already resolved in the code:

log/src/lib.rs

Lines 332 to 333 in e9123d6

	#[cfg(all(not(feature = "std"), not(test)))]
	extern crate core as std;

[EFanZh]

I don’t think this will change what ::std means in macros. Maybe I do need to change ::std to ::core, or something like $crate::__private_api_core::?

[EFanZh]

I have replaced ::std with $crate::__private_api::, since the only thing I can trust is $crate.

[Thomasdezeeuw]

LGTM. I think we also remove __private_api and use ::core instead, but this way works just as well.

[EFanZh]

LGTM. I think we also remove __private_api and use ::core instead, but this way works just as well.

I think ::core is not necessarily the core crate from the standard library. Like the log crate can rename core as std, downstream crates can also rename some other crate as core:

extern crate log as core;

fn main() {
    ::core::info!("xxx");
}

See https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=f22b3288ec76c436dc4a7a248e346072.