runtime safety check for casting null to pointer

see #1059

1 files changed, 9 insertions, 0 deletions

diff --git a/src/analyze.cpp b/src/analyze.cpp
index 900def52d4..6a8090a843 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -6902,3 +6902,12 @@ const char *container_string(ContainerKind kind) {
     }
     zig_unreachable();
 }
+
+bool ptr_allows_addr_zero(ZigType *ptr_type) {
+    if (ptr_type->id == ZigTypeIdPointer) {
+        return ptr_type->data.pointer.allow_zero;
+    } else if (ptr_type->id == ZigTypeIdOptional) {
+        return true;
+    }
+    return false;
+}