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/*
* MRustC - Mutabah's Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* ast/expr_ptr.hpp
* - Pointer type wrapping AST::ExprNode (prevents need to know the full definition)
*/
#include <memory>
namespace AST {
class ExprNode;
class NodeVisitor;
typedef ::std::unique_ptr<AST::ExprNode> ExprNodeP;
extern ::std::ostream& operator<<(::std::ostream& os, const ExprNode& node);
class Expr
{
::std::shared_ptr<ExprNode> m_node;
public:
Expr(unique_ptr<ExprNode> node);
Expr(ExprNode* node);
Expr();
bool is_valid() const { return m_node.get() != nullptr; }
const ExprNode& node() const { assert(m_node.get()); return *m_node; }
ExprNode& node() { assert(m_node.get()); return *m_node; }
::std::shared_ptr<ExprNode> take_node() { assert(m_node.get()); return ::std::move(m_node); }
void visit_nodes(NodeVisitor& v);
void visit_nodes(NodeVisitor& v) const;
Expr clone() const;
friend ::std::ostream& operator<<(::std::ostream& os, const Expr& pat);
};
}
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