Highlights unchanged parts and not changed parts in Rust code (maybe macros or attributes related) about difftastic HOT 7 CLOSED

Small Rust repro:

// old
#[cfg_attr(feature = "dox")]
bitflags! {
    pub struct AnchorHints: u32 {
    }
}

// new
bitflags! {
    #[cfg_attr(feature = "dox")]
    pub struct AnchorHints: u32 {
    }
}

Even smaller lisp repro:

;; old
foo
(x y)

;; new
(foo x y)

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Interesting, this is probably related to #30, but for the opening delimiter rather than the closing delimiter.

Thanks for the report. #30 is going to be fiddly to fix, so it might take me a while :)

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Should've added that this is with some older git version after 0.10.1 and also latest git (as of now). Main change with latest git is the addition of the slight syntax highlighting (nice btw!).

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@sdroege do you have the full file of before and after, or could you point me at the git repo you're using?

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Aha, looks like it's here: https://github.com/gtk-rs/gtk3-rs/blob/master/gdk/src/auto/flags.rs

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So the problem here is that difftastic prefers moving the delimiters rather than considering the attribute moved. The following program does not have the same problem:

// old
#[cfg_attr(feature = "dox")]
bitflags! {
    #[foo(bar)]
    pub struct AnchorHints: u32 {
    }
}

// new
bitflags! {
    #[foo(bar)]
    #[cfg_attr(feature = "dox")]
    pub struct AnchorHints: u32 {
    }
}

This is a really interesting case. Perhaps the cost metrics for moving delimiters should consider the first child of the list.

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No longer repros on trunk. There's been a bunch of improvements to list nesting recently.

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