implement `#[interrupt]`

1 files changed, 20 insertions, 0 deletions

diff --git a/cortex-m-rt/tests/compile-fail/interrupt-bad-signature-1.rs b/cortex-m-rt/tests/compile-fail/interrupt-bad-signature-1.rs
new file mode 100644
index 0000000..0222413
--- /dev/null
+++ b/cortex-m-rt/tests/compile-fail/interrupt-bad-signature-1.rs
@@ -0,0 +1,20 @@
+#![no_main]
+#![no_std]
+
+extern crate cortex_m_rt;
+extern crate panic_halt;
+
+use cortex_m_rt::{entry, interrupt};
+
+#[entry]
+fn foo() -> ! {
+    loop {}
+}
+
+enum interrupt {
+    USART1,
+}
+
+#[interrupt] //~ ERROR custom attribute panicked
+//~^ HELP `#[interrupt]` functions must have signature `[unsafe] fn() [-> !]`
+fn USART1(undef: i32) {}