Merge #90

90: turn macros into attributes r=adamgreig a=japaric

This is a PoC implementation of RFC #82. Assuming that we are OK with this implementation we should
add some compile fail tests (e.g. using a function with the wrong signature as the entry point)
before landing this.

Look at the diff of the examples to get an overview of the changes.

cc @rust-embedded/cortex-m

Co-authored-by: Jorge Aparicio <jorge@japaric.io>

1 files changed, 6 insertions, 11 deletions

diff --git a/cortex-m-rt/examples/override-exception.rs b/cortex-m-rt/examples/override-exception.rs
index 2f100a2..3e0af25 100644
--- a/cortex-m-rt/examples/override-exception.rs
+++ b/cortex-m-rt/examples/override-exception.rs
@@ -6,29 +6,24 @@
 #![no_std]
 
 extern crate cortex_m;
-#[macro_use(entry, exception)]
 extern crate cortex_m_rt as rt;
 extern crate panic_semihosting;
 
 use cortex_m::asm;
-use rt::ExceptionFrame;
-
-// the program entry point
-entry!(main);
+use rt::{entry, exception, ExceptionFrame};
 
+#[entry]
 fn main() -> ! {
     loop {}
 }
 
-exception!(*, default_handler);
-
-fn default_handler(_irqn: i16) {
+#[exception]
+fn DefaultHandler(_irqn: i16) {
     asm::bkpt();
 }
 
-exception!(HardFault, hard_fault);
-
-fn hard_fault(_ef: &ExceptionFrame) -> ! {
+#[exception]
+fn HardFault(_ef: &ExceptionFrame) -> ! {
     asm::bkpt();
 
     loop {}