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-rw-r--r--src/tuplr.hpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/tuplr.hpp b/src/tuplr.hpp
index 0385533..787355b 100644
--- a/src/tuplr.hpp
+++ b/src/tuplr.hpp
@@ -158,7 +158,7 @@ struct Object {
inline Tag tag() const { return (Tag)header()->tag; }
inline void tag(Tag t) { header()->tag = t; }
inline bool marked() const { return header()->mark != 0; }
- inline void mark(bool b) const { header()->mark = 1; }
+ inline void mark(bool b) const { header()->mark = (b ? 1 : 0); }
static void* operator new(size_t size) { return pool.alloc(size); }
static void operator delete(void* ptr) {}
@@ -638,6 +638,8 @@ Subst unify(const Constraints& c);
/// Compiler backend
struct Engine {
+ virtual ~Engine() {}
+
virtual CFunc startFunction(
CEnv& cenv,
const std::string& name,