Update upstream source from tag 'upstream/1.52.1+dfsg1'

[rustc.git] / src / tools / clippy / tests / ui / unit_arg_empty_blocks.rs

diff --git a/src/tools/clippy/tests/ui/unit_arg_empty_blocks.rs b/src/tools/clippy/tests/ui/unit_arg_empty_blocks.rs
new file mode 100644 (file)
index 0000000..18a31eb
--- /dev/null
+++ b/src/tools/clippy/tests/ui/unit_arg_empty_blocks.rs
@@ -0,0 +1,26 @@
+#![warn(clippy::unit_arg)]
+#![allow(clippy::no_effect, unused_must_use, unused_variables)]
+
+use std::fmt::Debug;
+
+fn foo<T: Debug>(t: T) {
+    println!("{:?}", t);
+}
+
+fn foo3<T1: Debug, T2: Debug, T3: Debug>(t1: T1, t2: T2, t3: T3) {
+    println!("{:?}, {:?}, {:?}", t1, t2, t3);
+}
+
+fn bad() {
+    foo({});
+    foo3({}, 2, 2);
+    taking_two_units({}, foo(0));
+    taking_three_units({}, foo(0), foo(1));
+}
+
+fn taking_two_units(a: (), b: ()) {}
+fn taking_three_units(a: (), b: (), c: ()) {}
+
+fn main() {
+    bad();
+}