properly handle #[cfg] (conditional compilation) on resources

tests/cfail/cfg-resources.rs

@@ -0,0 +1,64 @@
+#![no_main]
+#![no_std]
+
+extern crate lm3s6965;
+extern crate panic_halt;
+extern crate rtfm;
+
+use rtfm::app;
+
+#[app(device = lm3s6965)]
+const APP: () = {
+    #[cfg(never)]
+    static mut O1: u32 = 0; // init
+    #[cfg(never)]
+    static mut O2: u32 = 0; // idle
+    #[cfg(never)]
+    static mut O3: u32 = 0; // EXTI0
+    #[cfg(never)]
+    static O4: u32 = 0; // idle
+    #[cfg(never)]
+    static O5: u32 = 0; // EXTI1
+    #[cfg(never)]
+    static O6: u32 = 0; // init
+
+    #[cfg(never)]
+    static mut S1: u32 = 0; // idle & EXTI0
+    #[cfg(never)]
+    static mut S2: u32 = 0; // EXTI0 & EXTI1
+    #[cfg(never)]
+    static S3: u32 = 0;
+
+    #[init(resources = [O1, O4, O5, O6, S3])]
+    fn init() {
+        resources.O1; //~ ERROR no field `O1`
+        resources.O4; //~ ERROR no field `O4`
+        resources.O5; //~ ERROR no field `O5`
+        resources.O6; //~ ERROR no field `O6`
+        resources.S3; //~ ERROR no field `S3`
+    }
+
+    #[idle(resources = [O2, O4, S1, S3])]
+    fn idle() -> ! {
+        resources.O2; //~ ERROR no field `O2`
+        resources.O4; //~ ERROR no field `O4`
+        resources.S1; //~ ERROR no field `S1`
+        resources.S3; //~ ERROR no field `S3`
+
+        loop {}
+    }
+
+    #[interrupt(resources = [O3, S1, S2, S3])]
+    fn UART0() {
+        resources.O3; //~ ERROR no field `O3`
+        resources.S1; //~ ERROR no field `S1`
+        resources.S2; //~ ERROR no field `S2`
+        resources.S3; //~ ERROR no field `S3`
+    }
+
+    #[interrupt(resources = [S2, O5])]
+    fn UART1() {
+        resources.S2; //~ ERROR no field `S2`
+        resources.O5; //~ ERROR no field `O5`
+    }
+};

tests/cfail/cfg-static.rs

@@ -0,0 +1,57 @@
+#![no_main]
+#![no_std]
+
+extern crate lm3s6965;
+extern crate panic_halt;
+extern crate rtfm;
+
+use rtfm::app;
+
+#[app(device = lm3s6965)]
+const APP: () = {
+    #[init]
+    fn init() {
+        #[cfg(never)]
+        static mut FOO: u32 = 0;
+
+        FOO; //~ ERROR cannot find value `FOO` in this scope
+    }
+
+    #[idle]
+    fn idle() -> ! {
+        #[cfg(never)]
+        static mut FOO: u32 = 0;
+
+        FOO; //~ ERROR cannot find value `FOO` in this scope
+
+        loop {}
+    }
+
+    #[exception]
+    fn SVCall() {
+        #[cfg(never)]
+        static mut FOO: u32 = 0;
+
+        FOO; //~ ERROR cannot find value `FOO` in this scope
+    }
+
+    #[interrupt]
+    fn UART0() {
+        #[cfg(never)]
+        static mut FOO: u32 = 0;
+
+        FOO; //~ ERROR cannot find value `FOO` in this scope
+    }
+
+    #[task]
+    fn foo() {
+        #[cfg(never)]
+        static mut FOO: u32 = 0;
+
+        FOO; //~ ERROR cannot find value `FOO` in this scope
+    }
+
+    extern "C" {
+        fn UART1();
+    }
+};

tests/cpass/cfg.rs

@@ -0,0 +1,49 @@
+//! Compile-pass test that checks that `#[cfg]` attributes are respected
+
+#![deny(unsafe_code)]
+#![deny(warnings)]
+#![no_main]
+#![no_std]
+
+extern crate lm3s6965;
+extern crate panic_semihosting;
+extern crate rtfm;
+
+use rtfm::app;
+
+#[app(device = lm3s6965)]
+const APP: () = {
+    #[cfg(never)]
+    static mut FOO: u32 = 0;
+
+    #[init]
+    fn init() {
+        #[cfg(never)]
+        static mut BAR: u32 = 0;
+    }
+
+    #[idle]
+    fn idle() -> ! {
+        #[cfg(never)]
+        static mut BAR: u32 = 0;
+
+        loop {}
+    }
+
+    #[task(resources = [FOO])]
+    fn foo() {
+        #[cfg(never)]
+        static mut BAR: u32 = 0;
+    }
+
+    #[task(priority = 3, resources = [FOO])]
+    fn bar() {
+        #[cfg(never)]
+        static mut BAR: u32 = 0;
+    }
+
+    extern "C" {
+        fn UART0();
+        fn UART1();
+    }
+};