implement `#[interrupt]`

1 files changed, 33 insertions, 0 deletions

diff --git a/cortex-m-rt/tests/compile-fail/interrupt-soundness.rs b/cortex-m-rt/tests/compile-fail/interrupt-soundness.rs
new file mode 100644
index 0000000..b473a94
--- /dev/null
+++ b/cortex-m-rt/tests/compile-fail/interrupt-soundness.rs
@@ -0,0 +1,33 @@
+#![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,
+    USART2,
+}
+
+#[interrupt]
+fn USART1() {
+    static mut COUNT: u64 = 0;
+
+    if *COUNT % 2 == 0 {
+        *COUNT += 1;
+    } else {
+        *COUNT *= 2;
+    }
+}
+
+#[interrupt]
+fn USART2() {
+    USART1(); //~ ERROR cannot find function `USART1` in this scope
+}