summaryrefslogtreecommitdiffstats
path: root/tests/ui/ptr-coercion.rs
diff options
context:
space:
mode:
Diffstat (limited to 'tests/ui/ptr-coercion.rs')
-rw-r--r--tests/ui/ptr-coercion.rs23
1 files changed, 23 insertions, 0 deletions
diff --git a/tests/ui/ptr-coercion.rs b/tests/ui/ptr-coercion.rs
new file mode 100644
index 000000000..193899034
--- /dev/null
+++ b/tests/ui/ptr-coercion.rs
@@ -0,0 +1,23 @@
+// Test coercions between pointers which don't do anything fancy like unsizing.
+// These are testing that we don't lose mutability when converting to raw pointers.
+
+pub fn main() {
+ // *const -> *mut
+ let x: *const isize = &42;
+ let x: *mut isize = x; //~ ERROR mismatched types
+ //~| expected raw pointer `*mut isize`
+ //~| found raw pointer `*const isize`
+ //~| types differ in mutability
+
+ // & -> *mut
+ let x: *mut isize = &42; //~ ERROR mismatched types
+ //~| expected raw pointer `*mut isize`
+ //~| found reference `&isize`
+ //~| types differ in mutability
+
+ let x: *const isize = &42;
+ let x: *mut isize = x; //~ ERROR mismatched types
+ //~| expected raw pointer `*mut isize`
+ //~| found raw pointer `*const isize`
+ //~| types differ in mutability
+}