From b00b7bd29037f25ee155f07e74fcb5de44918926 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Sun, 10 Sep 2017 00:34:44 -0400
Subject: [PATCH] variables are allowed to be pointers to opaque

---
 src/ir.cpp          | 6 +++++-
 test/cases/misc.zig | 9 +++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/ir.cpp b/src/ir.cpp
index 5771fd480d..487f5897e4 100644
--- a/src/ir.cpp
+++ b/src/ir.cpp
@@ -9828,7 +9828,11 @@ static VarClassRequired get_var_class_required(TypeTableEntry *type_entry) {
             return VarClassRequiredConst;
 
         case TypeTableEntryIdPointer:
-            return get_var_class_required(type_entry->data.pointer.child_type);
+            if (type_entry->data.pointer.child_type->id == TypeTableEntryIdOpaque) {
+                return VarClassRequiredAny;
+            } else {
+                return get_var_class_required(type_entry->data.pointer.child_type);
+            }
         case TypeTableEntryIdArray:
             return get_var_class_required(type_entry->data.array.child_type);
         case TypeTableEntryIdMaybe:
diff --git a/test/cases/misc.zig b/test/cases/misc.zig
index a968fd213c..47e7ea5e1b 100644
--- a/test/cases/misc.zig
+++ b/test/cases/misc.zig
@@ -546,3 +546,12 @@ test "@OpaqueType" {
     assert(mem.eql(u8, @typeName(OpaqueA), "OpaqueA"));
     assert(mem.eql(u8, @typeName(OpaqueB), "OpaqueB"));
 }
+
+test "variable is allowed to be a pointer to an opaque type" {
+    var x: i32 = 1234;
+    _ = hereIsAnOpaqueType(@ptrCast(&OpaqueA, &x));
+}
+fn hereIsAnOpaqueType(ptr: &OpaqueA) -> &OpaqueA {
+    var a = ptr;
+    return a;
+}