#[doc = ...] fails to parse with uniffi attribute macros

[notmgsk]

This does not work

#[doc = std::concat!("A", "has a", "B")]
#[derive(uniffi::Enum)]
pub enum A {
    B,
}

but this does (without the derive)

#[doc = std::concat!("C", "has a", "D")]
pub enum C {
    D,
}

and this also works (using only a trivial string for the doc)

#[doc = "A has a B"]
#[derive(uniffi::Enum)]
pub enum A {
    B,
}

[BatmanAoD]

This works in 0.26, but is broken in 0.27.

[badboy]

Note: "does not work" is usually not very helpful. If you can it's always helpful to include the full error message you get.

[badboy]

The test I add in #2154 also fails on 0.26.

Doc string parsing first appeared in 0.26 here:

uniffi-rs/uniffi_macros/src/util.rs

Lines 295 to 301 in cd38cce

	let name_value = attr.meta.require_name_value()?;
	if let Expr::Lit(expr) = &name_value.value {
	if let Lit::Str(lit_str) = &expr.lit {
	return Ok(lit_str.value().trim().to_owned());
	}
	}
	Err(syn::Error::new_spanned(attr, "Cannot parse doc attribute"))

So yeah, that never worked since we added that.