Sol -> Yul Generation: Implicit conversions

libsolidity/codegen/ir/IRGeneratorForStatements.h

@@ -53,6 +53,10 @@ public:
 	bool visit(Literal const& _literal) override;
 
 private:
+	/// @returns a Yul expression representing the current value of @a _expression,
+	/// converted to type @a _to if it does not yet have that type.
+	std::string expressionAsType(Expression const& _expression, Type const& _to);
+
 	std::ostringstream m_code;
 	IRGenerationContext& m_context;
 	YulUtilFunctions& m_utils;