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-rw-r--r--libjulia/optimiser/ASTWalker.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/libjulia/optimiser/ASTWalker.h b/libjulia/optimiser/ASTWalker.h
index 97891381..f09c2ff1 100644
--- a/libjulia/optimiser/ASTWalker.h
+++ b/libjulia/optimiser/ASTWalker.h
@@ -42,6 +42,7 @@ namespace julia
class ASTWalker: public boost::static_visitor<>
{
public:
+ virtual ~ASTWalker() = default;
virtual void operator()(Literal const&) {}
virtual void operator()(Instruction const&) { solAssert(false, ""); }
virtual void operator()(Identifier const&) {}
@@ -82,6 +83,7 @@ protected:
class ASTModifier: public boost::static_visitor<>
{
public:
+ virtual ~ASTModifier() = default;
virtual void operator()(Literal&) {}
virtual void operator()(Instruction&) { solAssert(false, ""); }
virtual void operator()(Identifier&) {}