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-rw-r--r--libsolidity/ast/ASTVisitor.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/libsolidity/ast/ASTVisitor.h b/libsolidity/ast/ASTVisitor.h
index b1389f0f..6c0ce6f8 100644
--- a/libsolidity/ast/ASTVisitor.h
+++ b/libsolidity/ast/ASTVisitor.h
@@ -43,6 +43,7 @@ namespace solidity
class ASTVisitor
{
public:
+ virtual ~ASTVisitor() = default;
virtual bool visit(SourceUnit& _node) { return visitNode(_node); }
virtual bool visit(PragmaDirective& _node) { return visitNode(_node); }
virtual bool visit(ImportDirective& _node) { return visitNode(_node); }
@@ -147,6 +148,7 @@ protected:
class ASTConstVisitor
{
public:
+ virtual ~ASTConstVisitor() = default;
virtual bool visit(SourceUnit const& _node) { return visitNode(_node); }
virtual bool visit(PragmaDirective const& _node) { return visitNode(_node); }
virtual bool visit(ImportDirective const& _node) { return visitNode(_node); }