bnf_dsl.h

Go to the documentation of this file.

 
#ifndef BNF_DSL_H
#define BNF_DSL_H
 
#include <stddef.h>
 
 
#ifndef PREFIX_TK
#define PREFIX_TK(tk) tk
#endif
 
#ifndef PREFIX_NT
#define PREFIX_NT(nt) nt
#endif
 
#ifndef POSTFIX_NT_REST
#define POSTFIX_NT_REST(nt) nt ## _REST
#endif
 
#define EOB -1
#define EOC -2
 
#define SEOB { .ty = CFG_SENTINEL, .id = EOB }
#define SEOC { { .ty = CFG_SENTINEL, .id = EOC } }
 
#define TK(tk) { .ty = CFG_TOKEN, .id = PREFIX_TK(tk) }
#define NT(nt) { .ty = CFG_NONTERMINAL, .id = PREFIX_NT(nt) }
#define EPSILON SEOB
 
 
#define r(...) { { __VA_ARGS__ SEOB }, SEOC }
 
#define rrr(head, listelem, delim) \
    { { listelem, NT(POSTFIX_NT_REST(head)), SEOB }, SEOC }, \
    { { delim, NT(head), SEOB }, { SEOB }, SEOC }
 
#define ropt(...) { { __VA_ARGS__, SEOB }, { SEOB }, SEOC }
 
#define alt SEOB, }, {
 
 
#endif