tests: add underscore

Signed-off-by: Benno Lossin <[email protected]>

Author: BennoLossin

tests/underscore.rs

@@ -0,0 +1,31 @@
+use pin_init::{try_init, Init};
+
+pub struct Foo {
+    x: u64,
+}
+
+fn foo() -> bool {
+    false
+}
+
+fn bar() -> bool {
+    true
+}
+
+impl Foo {
+    pub fn new() -> impl Init<Self, ()> {
+        try_init!(Self {
+            _: {
+                if foo() {
+                    return Err(());
+                }
+            },
+            x: 0,
+            _: {
+                if bar() {
+                    return Err(());
+                }
+            }
+        }? ())
+    }
+}