change tasks! syntax to resemble struct initialization

tests/cfail/tasks-p0.rs

@@ -11,7 +11,11 @@ use device::interrupt::Exti0;
 // WRONG: Tasks can't have a priority of 0.
 // Only idle and init can have a priority of 0.
 tasks!(device, {
-    j1: (Exti0, P0),
+    j1: Task {
+        interrupt: Exti0,
+        priority: P0,
+        enabled: true,
+    },
 });
 
 fn init(_: P0, _: &C16) {}

tests/cfail/tasks-same-handler.rs

@@ -10,8 +10,16 @@ use device::interrupt::Exti0;
 
 // WRONG: Two tasks mapped to the same interrupt handler
 tasks!(device, {
-    j1: (Exti0, P1),
-    j2: (Exti0, P2),
+    j1: Task {
+        interrupt: Exti0,
+        priority: P1,
+        enabled: true,
+    },
+    j2: Task {
+        interrupt: Exti0,
+        priority: P2,
+        enabled: true,
+    },
 });
 
 fn init(_: P0, _: &C16) {}

tests/cfail/tasks-wrong-idle.rs

@@ -9,7 +9,11 @@ use device::interrupt::Exti0;
 use rtfm::{C16, P0, P1};
 
 tasks!(device, {
-    j1: (Exti0, P1),
+    j1: Task {
+        interrupt: Exti0,
+        priority: P1,
+        enabled: true,
+    },
 });
 
 fn init(_: P0, _: &C16) {}

tests/cfail/tasks-wrong-init.rs

@@ -9,7 +9,11 @@ use rtfm::{C1, P0, P1};
 use device::interrupt::Exti0;
 
 tasks!(device, {
-    j1: (Exti0, P1),
+    j1: Task {
+        interrupt: Exti0,
+        priority: P1,
+        enabled: true,
+    },
 });
 
 // WRONG. `init` must have signature `fn(P0, &C16)`

tests/cfail/tasks-wrong-priority.rs

@@ -9,7 +9,11 @@ use cortex_m_srp::{C16, P0, P1, P2};
 use device::interrupt::Exti1;
 
 tasks!(device, {
-    j1: (Exti0, P1),
+    j1: Task {
+        interrupt: Exti0,
+        priority: P1,
+        enabled: true,
+    },
 });
 
 fn init(_: P0, _: &C16) {}

tests/cfail/tasks-wrong-task.rs

@@ -9,7 +9,11 @@ use cortex_mrtfm::{C16, P0, P1};
 use device::interrupt::Exti1;
 
 tasks!(device, {
-    j1: (Exti0, P1),
+    j1: Task {
+        interrupt: Exti0,
+        priority: P1,
+        enabled: true,
+    },
 });
 
 fn init(_: P0, _: &C16) {}