refactor overseer into proc-macro based pattern (#2962)

polkadot/node/overseer/overseer-gen/tests/ui/err-01-duplicate-consumer.rs

@@ -0,0 +1,38 @@
+#![allow(dead_code)]
+
+use polkadot_overseer_gen::*;
+
+#[derive(Default)]
+struct AwesomeSubSys;
+
+#[derive(Default)]
+struct AwesomeSubSys2;
+
+#[derive(Clone, Debug)]
+struct SigSigSig;
+
+struct Event;
+
+#[derive(Clone)]
+struct MsgStrukt(u8);
+
+#[overlord(signal=SigSigSig, event=Event, gen=AllMessages, error=OverseerError)]
+struct Overseer {
+	#[subsystem(MsgStrukt)]
+	sub0: AwesomeSubSys,
+
+	#[subsystem(MsgStrukt)]
+	sub1: AwesomeSubSys2,
+}
+
+#[derive(Debug, Clone)]
+struct DummySpawner;
+
+struct DummyCtx;
+
+fn main() {
+	let overseer = Overseer::<_,_>::builder()
+		.sub0(AwesomeSubSys::default())
+		.spawner(DummySpawner)
+		.build(|| -> DummyCtx { DummyCtx } );
+}

polkadot/node/overseer/overseer-gen/tests/ui/err-01-duplicate-consumer.stderr

@@ -0,0 +1,21 @@
+error[E0119]: conflicting implementations of trait `std::convert::From<MsgStrukt>` for type `AllMessages`
+  --> $DIR/err-01-duplicate-consumer.rs:19:1
+   |
+19 | #[overlord(signal=SigSigSig, event=Event, gen=AllMessages, error=OverseerError)]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | |
+   | first implementation here
+   | conflicting implementation for `AllMessages`
+   |
+   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0119]: conflicting implementations of trait `polkadot_overseer_gen::SubsystemSender<MsgStrukt>` for type `OverseerSubsystemSender`
+  --> $DIR/err-01-duplicate-consumer.rs:19:1
+   |
+19 | #[overlord(signal=SigSigSig, event=Event, gen=AllMessages, error=OverseerError)]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   | |
+   | first implementation here
+   | conflicting implementation for `OverseerSubsystemSender`
+   |
+   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)

polkadot/node/overseer/overseer-gen/tests/ui/err-02-enum.rs

@@ -0,0 +1,32 @@
+#![allow(dead_code)]
+
+use polkadot_overseer_gen::*;
+
+#[derive(Default)]
+struct AwesomeSubSys;
+
+struct SigSigSig;
+
+struct Event;
+
+#[derive(Clone, Debug)]
+struct MsgStrukt(u8);
+
+#[overlord(signal=SigSigSig, event=Event, gen=AllMessages, error=OverseerError)]
+enum Overseer {
+	#[subsystem(MsgStrukt)]
+	Sub0(AwesomeSubSys),
+}
+
+#[derive(Debug, Clone)]
+struct DummySpawner;
+
+struct DummyCtx;
+
+fn main() {
+	let overseer = Overseer::<_,_>::builder()
+		.sub0(AwesomeSubSys::default())
+		.i_like_pie(std::f64::consts::PI)
+		.spawner(DummySpawner)
+		.build(|| -> DummyCtx { DummyCtx } );
+}

polkadot/node/overseer/overseer-gen/tests/ui/err-02-enum.stderr

@@ -0,0 +1,11 @@
+error: expected `struct`
+  --> $DIR/err-02-enum.rs:16:1
+   |
+16 | enum Overseer {
+   | ^^^^
+
+error[E0433]: failed to resolve: use of undeclared type `Overseer`
+  --> $DIR/err-02-enum.rs:27:17
+   |
+27 |     let overseer = Overseer::<_,_>::builder()
+   |                    ^^^^^^^^ use of undeclared type `Overseer`

polkadot/node/overseer/overseer-gen/tests/ui/err-03-subsys-twice.rs

@@ -0,0 +1,39 @@
+#![allow(dead_code)]
+
+use polkadot_overseer_gen::*;
+
+#[derive(Default)]
+struct AwesomeSubSys;
+
+#[derive(Clone, Debug)]
+struct SigSigSig;
+
+struct Event;
+
+#[derive(Clone, Debug)]
+struct MsgStrukt(u8);
+
+#[derive(Clone, Debug)]
+struct MsgStrukt2(f64);
+
+#[overlord(signal=SigSigSig, event=Event, gen=AllMessages, error=OverseerError)]
+struct Overseer {
+	#[subsystem(MsgStrukt)]
+	sub0: AwesomeSubSys,
+
+	#[subsystem(MsgStrukt2)]
+	sub1: AwesomeSubSys,
+}
+
+#[derive(Debug, Clone)]
+struct DummySpawner;
+
+struct DummyCtx;
+
+fn main() {
+	let overseer = Overseer::<_,_>::builder()
+		.sub0(AwesomeSubSys::default())
+		.i_like_pie(std::f64::consts::PI)
+		.spawner(DummySpawner)
+		.build(|| -> DummyCtx { DummyCtx } );
+}

polkadot/node/overseer/overseer-gen/tests/ui/err-03-subsys-twice.stderr

@@ -0,0 +1,17 @@
+error: Duplicate subsystem names `AwesomeSubSys`
+  --> $DIR/err-03-subsys-twice.rs:25:8
+   |
+25 |     sub1: AwesomeSubSys,
+   |           ^^^^^^^^^^^^^
+
+error: previously defined here.
+  --> $DIR/err-03-subsys-twice.rs:22:8
+   |
+22 |     sub0: AwesomeSubSys,
+   |           ^^^^^^^^^^^^^
+
+error[E0433]: failed to resolve: use of undeclared type `Overseer`
+  --> $DIR/err-03-subsys-twice.rs:34:17
+   |
+34 |     let overseer = Overseer::<_,_>::builder()
+   |                    ^^^^^^^^ use of undeclared type `Overseer`

polkadot/node/overseer/overseer-gen/tests/ui/err-04-missing-error.rs

@@ -0,0 +1,36 @@
+#![allow(dead_code)]
+
+use polkadot_overseer_gen::*;
+
+#[derive(Default)]
+struct AwesomeSubSys;
+
+#[derive(Clone, Debug)]
+struct SigSigSig;
+
+struct Event;
+
+#[derive(Clone)]
+struct MsgStrukt(u8);
+
+#[overlord(signal=SigSigSig, event=Event, gen=AllMessages)]
+struct Overseer {
+	#[subsystem(no_dispatch, MsgStrukt)]
+	sub0: AwesomeSubSys,
+
+	i_like_pie: f64,
+}
+
+#[derive(Debug, Clone)]
+struct DummySpawner;
+
+struct DummyCtx;
+
+fn main() {
+	let _ = Overseer::builder()
+		.sub0(AwesomeSubSys::default())
+		.i_like_pie(std::f64::consts::PI)
+		.spawner(DummySpawner)
+		.build()
+		.unwrap();
+}

polkadot/node/overseer/overseer-gen/tests/ui/err-04-missing-error.stderr

@@ -0,0 +1,13 @@
+error: Must declare the overseer error type via `error=..`.
+  --> $DIR/err-04-missing-error.rs:16:1
+   |
+16 | #[overlord(signal=SigSigSig, event=Event, gen=AllMessages)]
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
+
+error[E0433]: failed to resolve: use of undeclared type `Overseer`
+  --> $DIR/err-04-missing-error.rs:30:10
+   |
+30 |     let _ = Overseer::builder()
+   |             ^^^^^^^^ use of undeclared type `Overseer`