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Diffstat (limited to 'pkg/lang/vm/mem/ptr.go')
-rw-r--r--pkg/lang/vm/mem/ptr.go8
1 files changed, 8 insertions, 0 deletions
diff --git a/pkg/lang/vm/mem/ptr.go b/pkg/lang/vm/mem/ptr.go
index 5e3bf3d..f6e3e64 100644
--- a/pkg/lang/vm/mem/ptr.go
+++ b/pkg/lang/vm/mem/ptr.go
@@ -4,7 +4,15 @@ import "strconv"
 
 type Ptr uint64
 
+const (
+	NullPtr Ptr = 0
+)
+
 func (p Ptr) String() string {
 	val := strconv.FormatUint(uint64(p), 10)
 	return "@" + val
 }
+
+func (p Ptr) IsNull() bool {
+	return p == NullPtr
+}