option_env!($env).expect($message)
};
}
+
+#[macro_export]
+macro_rules! ref_arg_binding {
+ () => {
+ let ref _y = 42;
+ };
+}
+
+#[macro_export]
+macro_rules! ref_arg_function {
+ () => {
+ fn fun_example(ref _x: usize) {}
+ };
+}
+
+#[macro_export]
+macro_rules! as_conv_with_arg {
+ (0u32 as u64) => {
+ ()
+ };
+}
+
+#[macro_export]
+macro_rules! as_conv {
+ () => {
+ 0u32 as u64
+ };
+}