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354fcf2b52
Add infrastructure to apply a derive macro to arguments, consuming and returning a `TokenTree` only. Handle `SyntaxExtensionKind::MacroRules` when expanding a derive, if the macro's kinds support derive. Add tests covering various cases of `macro_rules` derives. Note that due to a pre-existing FIXME in `expand.rs`, derives are re-queued and some errors get emitted twice. Duplicate diagnostic suppression makes them not visible, but the FIXME should still get fixed.
76 lines
2.6 KiB
Plaintext
76 lines
2.6 KiB
Plaintext
error: MyDerive: struct S1;
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--> $DIR/macro-rules-derive-error.rs:5:9
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LL | compile_error!(concat!("MyDerive: ", stringify!($($body)*)));
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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...
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LL | #[derive(MyDerive)]
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| -------- in this derive macro expansion
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= note: this error originates in the derive macro `MyDerive` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: cannot find macro `MyDerive` in this scope
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--> $DIR/macro-rules-derive-error.rs:28:5
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LL | MyDerive!(arg);
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| ^^^^^^^^
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= note: `MyDerive` is in scope, but it is a derive macro: `#[derive(MyDerive)]`
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error: cannot find derive macro `fn_only` in this scope
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--> $DIR/macro-rules-derive-error.rs:30:14
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LL | macro_rules! fn_only {
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| ------- `fn_only` exists, but has no `derive` rules
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...
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LL | #[derive(fn_only)]
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| ^^^^^^^
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error: cannot find derive macro `fn_only` in this scope
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--> $DIR/macro-rules-derive-error.rs:30:14
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LL | macro_rules! fn_only {
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| ------- `fn_only` exists, but has no `derive` rules
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...
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LL | #[derive(fn_only)]
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| ^^^^^^^
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= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
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error: cannot find macro `DeriveOnly` in this scope
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--> $DIR/macro-rules-derive-error.rs:36:5
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LL | macro_rules! DeriveOnly {
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| ---------- `DeriveOnly` exists, but has no rules for function-like invocation
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...
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LL | DeriveOnly!();
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| ^^^^^^^^^^
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error: cannot find derive macro `ForwardReferencedDerive` in this scope
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--> $DIR/macro-rules-derive-error.rs:39:10
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LL | #[derive(ForwardReferencedDerive)]
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| ^^^^^^^^^^^^^^^^^^^^^^^ consider moving the definition of `ForwardReferencedDerive` before this call
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note: a macro with the same name exists, but it appears later
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--> $DIR/macro-rules-derive-error.rs:47:14
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LL | macro_rules! ForwardReferencedDerive {
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| ^^^^^^^^^^^^^^^^^^^^^^^
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error: cannot find derive macro `ForwardReferencedDerive` in this scope
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--> $DIR/macro-rules-derive-error.rs:39:10
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LL | #[derive(ForwardReferencedDerive)]
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| ^^^^^^^^^^^^^^^^^^^^^^^ consider moving the definition of `ForwardReferencedDerive` before this call
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note: a macro with the same name exists, but it appears later
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--> $DIR/macro-rules-derive-error.rs:47:14
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LL | macro_rules! ForwardReferencedDerive {
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| ^^^^^^^^^^^^^^^^^^^^^^^
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= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
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error: aborting due to 7 previous errors
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