New upstream version 1.52.1+dfsg1

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

diff --git a/src/tools/clippy/tests/ui/must_use_unit.rs b/src/tools/clippy/tests/ui/must_use_unit.rs
new file mode 100644 (file)
index 0000000..8a395dc
--- /dev/null
+++ b/src/tools/clippy/tests/ui/must_use_unit.rs
@@ -0,0 +1,26 @@
+//run-rustfix
+// aux-build:macro_rules.rs
+
+#![warn(clippy::must_use_unit)]
+#![allow(clippy::unused_unit)]
+
+#[macro_use]
+extern crate macro_rules;
+
+#[must_use]
+pub fn must_use_default() {}
+
+#[must_use]
+pub fn must_use_unit() -> () {}
+
+#[must_use = "With note"]
+pub fn must_use_with_note() {}
+
+fn main() {
+    must_use_default();
+    must_use_unit();
+    must_use_with_note();
+
+    // We should not lint in external macros
+    must_use_unit!();
+}