#include <stddef.h>

int lex_looks_like_year(const char *, int *);
int lex_looks_like_month(const char *);
int lex_looks_like_day(const char *);

#define LEX_SYMBOL X(END), X(ERROR), X(TEXT), X(BANG), X(BRACKET), X(WHITE), \
	X(MAP), \
	/* Commands */ X(SOURCE), X(DEFAULT), X(SIGNIFICANT), X(SCORE), \
	/* Arguments */ X(ARG_KEYWORD), X(ARG_DATE), X(ARG_NATURAL), X(ARG_FREEFORM)

#define X(n) n
struct lex {
	enum lex_symbol { LEX_SYMBOL } symbol;
	int ws_before, new_paragraph;
	const char *s0, *s1;
	size_t line;
};
#undef X
#define X(n) #n
static const char *const lex_symbols[] = { LEX_SYMBOL };
#undef X

void lex_reset(const char *const buffer);
int lex_next(struct lex *);