error: malformed `proc_macro_derive` attribute input --> $DIR/attribute.rs:9:1 | LL | #[proc_macro_derive] | ^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[proc_macro_derive(TraitName, /*opt*/ attributes(name1, name2, ...))]` error: malformed `proc_macro_derive` attribute input --> $DIR/attribute.rs:12:1 | LL | #[proc_macro_derive = ""] | ^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[proc_macro_derive(TraitName, /*opt*/ attributes(name1, name2, ...))]` error: attribute must have either one or two arguments --> $DIR/attribute.rs:15:1 | LL | #[proc_macro_derive(d3, a, b)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: attribute must have either one or two arguments --> $DIR/attribute.rs:19:1 | LL | #[proc_macro_derive(d4, attributes(a), b)] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: not a meta item --> $DIR/attribute.rs:23:21 | LL | #[proc_macro_derive("a")] | ^^^ error: must only be one word --> $DIR/attribute.rs:27:21 | LL | #[proc_macro_derive(d6 = "")] | ^^^^^^^ error: must only be one word --> $DIR/attribute.rs:31:21 | LL | #[proc_macro_derive(m::d7)] | ^^^^^ error: must only be one word --> $DIR/attribute.rs:35:21 | LL | #[proc_macro_derive(d8(a))] | ^^^^^ error: `self` cannot be a name of derive macro --> $DIR/attribute.rs:39:21 | LL | #[proc_macro_derive(self)] | ^^^^ error: second argument must be `attributes` --> $DIR/attribute.rs:46:26 | LL | #[proc_macro_derive(d11, a)] | ^ error: attribute must be of form: `attributes(foo, bar)` --> $DIR/attribute.rs:46:26 | LL | #[proc_macro_derive(d11, a)] | ^ error: attribute must be of form: `attributes(foo, bar)` --> $DIR/attribute.rs:51:26 | LL | #[proc_macro_derive(d12, attributes)] | ^^^^^^^^^^ error: attribute must be a meta item, not a literal --> $DIR/attribute.rs:55:37 | LL | #[proc_macro_derive(d13, attributes("a"))] | ^^^ error: attribute must only be a single word --> $DIR/attribute.rs:59:37 | LL | #[proc_macro_derive(d14, attributes(a = ""))] | ^^^^^^ error: attribute must only be a single word --> $DIR/attribute.rs:63:37 | LL | #[proc_macro_derive(d15, attributes(m::a))] | ^^^^ error: attribute must only be a single word --> $DIR/attribute.rs:67:37 | LL | #[proc_macro_derive(d16, attributes(a(b)))] | ^^^^ error: `self` cannot be a name of derive helper attribute --> $DIR/attribute.rs:71:37 | LL | #[proc_macro_derive(d17, attributes(self))] | ^^^^ error: aborting due to 17 previous errors