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/*
*/
#pragma once
#ifndef _SYNEXT_HPP_
#define _SYNEXT_HPP_
#include "../ast/item.hpp"
namespace AST {
class Crate;
class MetaItem;
class Path;
class Module;
class Item;
class ExprNode;
class Expr;
class MacroInvocation;
}
class TokenTree;
class TokenStream;
#include "../common.hpp" // for mv$ and other things
#include <string>
#include <memory>
enum class AttrStage
{
EarlyPre,
EarlyPost,
LatePre,
LatePost,
};
class ExpandDecorator
{
public:
virtual AttrStage stage() const = 0;
virtual void handle(const AST::MetaItem& mi, AST::Crate& crate) const {}
virtual void handle(const AST::MetaItem& mi, AST::Crate& crate, AST::MacroInvocation& mac) const {}
virtual void handle(const AST::MetaItem& mi, AST::Crate& crate, const AST::Path& path, AST::Module& mod, AST::Item&i) const {}
virtual void handle(const AST::MetaItem& mi, AST::ExprNode& expr) const {};
};
enum class MacroPosition
{
Item,
Stmt,
Expr,
Type,
Pattern,
};
class ExpandProcMacro
{
public:
virtual bool expand_early() const = 0;
virtual ::std::unique_ptr<TokenStream> expand(const ::std::string& ident, const TokenTree& tt, AST::Module& mod) = 0;
};
#define STATIC_DECORATOR(ident, _handler_class) \
struct register_##_handler_class##_c {\
register_##_handler_class##_c() {\
Register_Synext_Decorator( ident, ::std::unique_ptr<ExpandDecorator>(new _handler_class()) ); \
} \
} s_register_##_handler_class;
#define STATIC_MACRO(ident, _handler_class) \
struct register_##_handler_class##_c {\
register_##_handler_class##_c() {\
Register_Synext_Macro( ident, ::std::unique_ptr<ExpandProcMacro>(new _handler_class()) ); \
} \
} s_register_##_handler_class;
extern void Register_Synext_Decorator(::std::string name, ::std::unique_ptr<ExpandDecorator> handler);
extern void Register_Synext_Macro(::std::string name, ::std::unique_ptr<ExpandProcMacro> handler);
#endif
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