From c7deb5bdc2dead50d728c71a18095f088398b7db Mon Sep 17 00:00:00 2001
From: varkor <github@varkor.com>
Date: Tue, 23 Apr 2019 00:03:14 +0100
Subject: [PATCH] Add a test for const arguments

---
 src/test/ui/const-generics/const-arg-in-fn.rs     | 13 +++++++++++++
 src/test/ui/const-generics/const-arg-in-fn.stderr |  6 ++++++
 2 files changed, 19 insertions(+)
 create mode 100644 src/test/ui/const-generics/const-arg-in-fn.rs
 create mode 100644 src/test/ui/const-generics/const-arg-in-fn.stderr

diff --git a/src/test/ui/const-generics/const-arg-in-fn.rs b/src/test/ui/const-generics/const-arg-in-fn.rs
new file mode 100644
index 000000000000..3f86782838ca
--- /dev/null
+++ b/src/test/ui/const-generics/const-arg-in-fn.rs
@@ -0,0 +1,13 @@
+// run-pass
+
+#![feature(const_generics)]
+//~^ WARN the feature `const_generics` is incomplete and may cause the compiler to crash
+
+fn const_u32_identity<const X: u32>() -> u32 {
+    X
+}
+
+ fn main() {
+    let val = const_u32_identity::<18>();
+    assert_eq!(val, 18);
+}
diff --git a/src/test/ui/const-generics/const-arg-in-fn.stderr b/src/test/ui/const-generics/const-arg-in-fn.stderr
new file mode 100644
index 000000000000..e32b714b25d3
--- /dev/null
+++ b/src/test/ui/const-generics/const-arg-in-fn.stderr
@@ -0,0 +1,6 @@
+warning: the feature `const_generics` is incomplete and may cause the compiler to crash
+  --> $DIR/const-arg-in-fn.rs:3:12
+   |
+LL | #![feature(const_generics)]
+   |            ^^^^^^^^^^^^^^
+