From 562c64d86aeea35890841d1c09a731ff13815f95 Mon Sep 17 00:00:00 2001
From: Oliver Schneider <git-spam-no-reply9815368754983@oli-obk.de>
Date: Thu, 15 Sep 2016 16:32:30 +0200
Subject: [PATCH] add some sanity tests

---
 tests/run-pass/function_pointers.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/tests/run-pass/function_pointers.rs b/tests/run-pass/function_pointers.rs
index 2e75a5a3ea2a..e7368004069f 100644
--- a/tests/run-pass/function_pointers.rs
+++ b/tests/run-pass/function_pointers.rs
@@ -2,6 +2,10 @@ fn f() -> i32 {
     42
 }
 
+fn g(i: i32) -> i32 {
+    i*42
+}
+
 fn return_fn_ptr() -> fn() -> i32 {
     f
 }
@@ -10,8 +14,22 @@ fn call_fn_ptr() -> i32 {
     return_fn_ptr()()
 }
 
+fn indirect<F: Fn() -> i32>(f: F) -> i32 { f() }
+fn indirect_mut<F: FnMut() -> i32>(mut f: F) -> i32 { f() }
+fn indirect_once<F: FnOnce() -> i32>(f: F) -> i32 { f() }
+
+fn indirect2<F: Fn(i32) -> i32>(f: F) -> i32 { f(10) }
+fn indirect_mut2<F: FnMut(i32) -> i32>(mut f: F) -> i32 { f(10) }
+fn indirect_once2<F: FnOnce(i32) -> i32>(f: F) -> i32 { f(10) }
+
 fn main() {
     assert_eq!(call_fn_ptr(), 42);
+    assert_eq!(indirect(f), 42);
+    assert_eq!(indirect_mut(f), 42);
+    assert_eq!(indirect_once(f), 42);
+    assert_eq!(indirect2(g), 420);
+    assert_eq!(indirect_mut2(g), 420);
+    assert_eq!(indirect_once2(g), 420);
     assert!(return_fn_ptr() == f);
     assert!(return_fn_ptr() as unsafe fn() -> i32 == f as fn() -> i32 as unsafe fn() -> i32);
 }