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