Showcase usage of paren around cast

Author: lucic71

tests/unit/out/unsafe/strchr_c.rs

@@ -12,8 +12,8 @@ pub fn main() {
     }
 }
 unsafe fn main_0() -> i32 {
-    let mut s: *const u8 = b"hello world\0".as_ptr().cast_mut().cast_const();
-    let mut r: *mut u8 = libc::strchr(s as *const i8, ('w' as i32)) as *mut u8;
+    let mut s: *const u8 = (b"hello world\0".as_ptr().cast_mut()).cast_const();
+    let mut r: *const u8 = (libc::strchr(s as *const i8, ('w' as i32)) as *mut u8).cast_const();
     assert!((((!((r).is_null())) as i32) != 0));
     assert!((((((*r) as i32) == ('w' as i32)) as i32) != 0));
     assert!(((((libc::strchr(s as *const i8, ('z' as i32)) as *mut u8).is_null()) as i32) != 0));

tests/unit/strchr_c.c

@@ -4,7 +4,7 @@
 
 int main() {
   const char *s = "hello world";
-  char *r = strchr(s, 'w');
+  const char *r = strchr(s, 'w');
   assert(r != NULL);
   assert(*r == 'w');
   assert(strchr(s, 'z') == NULL);