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#ifndef MACROS_HPP_INCLUDED
#define MACROS_HPP_INCLUDED
#include "parse/lex.hpp"
#include "parse/tokentree.hpp"
#include <map>
#include <memory>
#include <cstring>
class MacroExpander;
namespace AST {
class Module;
}
class MacroRuleEnt:
public Serialisable
{
friend class MacroExpander;
Token tok;
::std::string name;
::std::vector<MacroRuleEnt> subpats;
public:
MacroRuleEnt():
tok(TOK_NULL),
name("")
{
}
MacroRuleEnt(Token tok):
tok(tok),
name("")
{
}
MacroRuleEnt(::std::string name):
name(name)
{
}
MacroRuleEnt(Token tok, ::std::vector<MacroRuleEnt> subpats):
tok(tok),
subpats(subpats)
{
}
friend ::std::ostream& operator<<(::std::ostream& os, const MacroRuleEnt& x);
SERIALISABLE_PROTOTYPES();
};
struct MacroPatEnt:
public Serialisable
{
::std::string name;
Token tok;
::std::vector<MacroPatEnt> subpats;
enum Type {
PAT_TOKEN,
PAT_TT,
PAT_PAT,
PAT_IDENT,
PAT_PATH,
PAT_TYPE,
PAT_EXPR,
PAT_STMT,
PAT_BLOCK,
PAT_META,
PAT_LOOP, // Enables use of subpats
} type;
MacroPatEnt():
tok(TOK_NULL),
type(PAT_TOKEN)
{
}
MacroPatEnt(Token tok):
tok(tok),
type(PAT_TOKEN)
{
}
MacroPatEnt(::std::string name, Type type):
name(name),
tok(),
type(type)
{
}
MacroPatEnt(Token sep, bool need_once, ::std::vector<MacroPatEnt> ents):
name( need_once ? "+" : "*" ),
tok(sep),
subpats( move(ents) ),
type(PAT_LOOP)
{
}
friend ::std::ostream& operator<<(::std::ostream& os, const MacroPatEnt& x);
SERIALISABLE_PROTOTYPES();
};
/// A rule within a macro_rules! blcok
class MacroRule:
public Serialisable
{
public:
::std::vector<MacroPatEnt> m_pattern;
::std::vector<MacroRuleEnt> m_contents;
SERIALISABLE_PROTOTYPES();
};
/// A sigle 'macro_rules!' block
typedef ::std::vector<MacroRule> MacroRules;
extern ::std::unique_ptr<TokenStream> Macro_InvokeRules(const char *name, const MacroRules& rules, TokenTree input);
extern ::std::unique_ptr<TokenStream> Macro_Invoke(const TokenStream& lex, const ::std::string& name, TokenTree input);
#endif // MACROS_HPP_INCLUDED
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