rust/src/test/ui/derives/deriving-meta-unknown-trait.rs

#[derive(Eqr)]
//~^ ERROR cannot find derive macro `Eqr` in this scope
struct Foo;

pub fn main() {}
Make #[derive(Anything)] into sugar for #[derive_Anything] This is a hack, but I don't think we can do much better as long as `derive` is running at the syntax expansion phase. If the custom_derive feature gate is enabled, this works with user-defined traits and syntax extensions. Without the gate, you can't use e.g. #[derive_Clone] directly, so this does not change the stable language. This commit also cleans up the deriving code somewhat, and forbids some previously-meaningless attribute syntax. For this reason it's technically a [breaking-change] 2015-03-06 13:15:54 -08:00			`#[derive(Eqr)]`
Move derive macro expansion into the MacroExpander This removes the expand_derives function, and sprinkles the functionality throughout the Invocation Collector, Expander and Resolver. 2017-02-01 21:03:09 +10:30			//~^ ERROR cannot find derive macro `Eqr` in this scope
syntax: implement #[deriving] meta-attribute 2013-03-11 16:47:23 -04:00			`struct Foo;`

			`pub fn main() {}`