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#ifndef LEXER_H
#define LEXER_H
#include <stdlib.h>
#include "preprocessor.h"
typedef enum stmt_type stmt_type;
typedef enum cond_type cond_type;
typedef struct source source;
typedef struct alt_stmt alt_stmt;
typedef struct cond_stmt cond_stmt;
typedef struct stmt stmt;
typedef void *(lex_func)(source *src, int dbg);
enum stmt_type {
STMT_NONE,
STMT_FUNC,
STMT_EXPR,
STMT_COND,
STMT_COMP,
NUM_STMTS
};
enum cond_type {
COND_NONE,
COND_IF,
COND_FOR,
COND_WHILE,
COND_DO,
NUM_CONDS
};
struct alt_stmt {
int type;
size_t offset;
lex_func *lex;
};
struct cond_stmt {
cond_type type;
expr *expr;
stmt *stmt;
};
struct stmt {
stmt_type type;
union {
func *func;
expr *expr;
cond_stmt *cond_stmt;
stmt *down;
};
whitespace wsp;
stmt *next;
};
extern int lex(source *src, int dbg);
#endif
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