multi macro_rules with the same name, rename failed

[A4-Tacks]

rust-analyzer version: rust-analyzer 1.82.0-nightly (7c2012d 2024-07-26)

rustc version: rustc 1.82.0-nightly (7c2012d 2024-07-26)

editor or extension: Vim9.1 coc-rust-analyzer

code snippet to reproduce:

fn main() {
    macro_rules! foo {
        () => {
            1
        };
    }
    assert_eq!(foo!(), 1);
    macro_rules! foo {
        () => {
            2
        };
    }
    assert_eq!(foo!(), 2); // in this line rename `foo`
}

rename foo into bar

fn main() {
    macro_rules! foo {
        () => {
            1
        };
    }
    assert_eq!(bar!(), 1);
    macro_rules! bar {
        () => {
            2
        };
    }
    assert_eq!(bar!(), 2); // in this line rename `foo`
}

expect output:

fn main() {
    macro_rules! foo {
        () => {
            1
        };
    }
    assert_eq!(foo!(), 1);
    macro_rules! bar {
        () => {
            2
        };
    }
    assert_eq!(bar!(), 2); // in this line rename `foo`
}

[ChayimFriedman2]

Let's see if I can do this (I guess this will involve some fundamental changes to namres)...

@rustbot claim

[Veykril]

There is a couple of related issues to this #7084 #14862 #15749

The gist of the issue is that we don't handle the textual macro_rules scoping correctly (as well as the macro definition hierarchy https://rustc-dev-guide.rust-lang.org/macro-expansion.html#the-macro-definition-hierarchy)

[ChayimFriedman2]

@rustbot release-assignment

Occupied with other things currently.