container attributes 'field_identifier' and 'variant_identifier' are not documented

[Lireer]

The attribute field_identifier is shown in a comment in the example Manually deserialize struct, but I can't find any documentation explaining what it does.

The same applies to variant_identifier which I found while looking through the code.

[Mingun]

Container attributes transparent, from and into are also undocumented

serde/serde_derive/src/internals/attr.rs

Lines 233 to 236 in 06dcbbb

	// Parse `#[serde(transparent)]`
	Meta(Word(ref word)) if word == "transparent" => {
	transparent.set_true();
	}

serde/serde_derive/src/internals/attr.rs

Lines 332 to 344 in 06dcbbb

	// Parse `#[serde(from = "Type")]
	Meta(NameValue(ref m)) if m.ident == "from" => {
	if let Ok(from_ty) = parse_lit_into_ty(cx, &m.ident, &m.lit) {
	type_from.set_opt(Some(from_ty));
	}
	}
	// Parse `#[serde(into = "Type")]
	Meta(NameValue(ref m)) if m.ident == "into" => {
	if let Ok(into_ty) = parse_lit_into_ty(cx, &m.ident, &m.lit) {
	type_into.set_opt(Some(into_ty));
	}
	}

[wigy-opensource-developer]

@dtolnay I could find the documentation for transparent, from and into as container attributes, but the field_identifier and variant_identifier are still missing. Would you please shed some light on their usage?

[ximon18]

I just came across this and noticed that field_identifier and variant_identifier are still not documented and, while I found GitHub issues referring to them, the context in those issues wasn't enough to make it clear what these attributes do or how they are supposed to be used (the examples given show only an isolated enum and not what the impact of the field on the enum is or how it fits into an actual use case). Documentation for these fields would be appreciated. If I understood what they do and why I would happily submit a PR... 😉

[hellow554]

Ping. Still not documented :/