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#![feature(macro_derive)]
macro_rules! MyDerive {
derive() { $($body:tt)* } => {
compile_error!(concat!("MyDerive: ", stringify!($($body)*)));
};
//~^^ ERROR: MyDerive
}
macro_rules! fn_only {
//~^ NOTE: `fn_only` exists, but has no `derive` rules
//~| NOTE: `fn_only` exists, but has no `derive` rules
{} => {}
}
//~v NOTE: `DeriveOnly` exists, but has no rules for function-like invocation
macro_rules! DeriveOnly {
derive() {} => {}
}
fn main() {
//~v NOTE: in this expansion of #[derive(MyDerive)]
#[derive(MyDerive)]
struct S1;
//~vv ERROR: cannot find macro `MyDerive` in this scope
//~| NOTE: `MyDerive` is in scope, but it is a derive
MyDerive!(arg);
#[derive(fn_only)]
struct S2;
//~^^ ERROR: cannot find derive macro `fn_only` in this scope
//~| ERROR: cannot find derive macro `fn_only` in this scope
//~| NOTE: duplicate diagnostic emitted
DeriveOnly!(); //~ ERROR: cannot find macro `DeriveOnly` in this scope
}
#[derive(ForwardReferencedDerive)]
struct S;
//~^^ ERROR: cannot find derive macro `ForwardReferencedDerive` in this scope
//~| NOTE: consider moving the definition of `ForwardReferencedDerive` before this call
//~| ERROR: cannot find derive macro `ForwardReferencedDerive` in this scope
//~| NOTE: consider moving the definition of `ForwardReferencedDerive` before this call
//~| NOTE: duplicate diagnostic emitted
macro_rules! ForwardReferencedDerive {
//~^ NOTE: a macro with the same name exists, but it appears later
//~| NOTE: a macro with the same name exists, but it appears later
derive() {} => {}
}
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