tests: add test for check correct macro hygiene

Author: nbdd0121

tests/macro-hygiene.rs

@@ -0,0 +1,22 @@
+macro_rules! wrap_init {
+    ($($args:tt)*) => {
+        ::pin_init::init!(
+            $($args)*
+        )
+    }
+}
+
+struct Foo {
+    a: u32,
+    b: u32,
+    c: u32,
+}
+
+fn main() {
+    let c = 3;
+    let _ = wrap_init!(Foo {
+        a: 1,
+        b <- 2,
+        c,
+    });
+}