/// ExprAST - Base class for all expression nodes.
class ExprAST {
public:
- virtual ~ExprAST() {}
+ virtual ~ExprAST();
virtual Value *Codegen() = 0;
};
+// Provide out-of-line definition to prevent weak vtable.
+ExprAST::~ExprAST() {}
+
/// NumberExprAST - Expression class for numeric literals like "1.0".
class NumberExprAST : public ExprAST {
double Val;