interpret/src/lex.h

#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 \
	\
	/* Results. */ \
	X(END), X(SYNTAX), X(ILLEGAL), X(NOT_FOUND), \
	\
	/* Text. */ \
	X(PARAGRAPH), X(TEXT), X(CAPTION), \
	\
	/* Edicts. */ \
	X(SOURCE), X(DEFAULT), X(SOURCE_RECALL), \
	X(LOCATION), X(LOCATION_SAVE), X(LOCATION_RECALL), \
	X(SIGNIFICANT), X(SIGNIFICANT_RECALL), \
	\
	/* Arguments. */ \
	X(ARG_KEYWORD), X(ARG_DATE), X(ARG_NATURAL), X(ARG_FREEFORM), \
	\
	/* Bible */ \
	X(BIBLE_BOOK), X(BIBLE_CHAPTER_VERSE), X(BIBLE_TEXT), X(BIBLE_NEXT)

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