#include "data/identifier.h"
#include "data/variable.h"
+#include "libpspp/cast.h"
#include "libpspp/compiler.h"
#include "libpspp/prompt.h"
void lex_get (struct lexer *);
/* Token testing functions. */
-bool lex_is_number (struct lexer *);
-double lex_number (struct lexer *);
-bool lex_is_integer (struct lexer *);
-long lex_integer (struct lexer *);
-bool lex_is_string (struct lexer *);
+bool lex_is_number (const struct lexer *);
+double lex_number (const struct lexer *);
+bool lex_is_integer (const struct lexer *);
+long lex_integer (const struct lexer *);
+bool lex_is_string (const struct lexer *);
/* Token testing functions with lookahead. */
-bool lex_next_is_number (struct lexer *, int n);
-double lex_next_number (struct lexer *, int n);
-bool lex_next_is_integer (struct lexer *, int n);
-long lex_next_integer (struct lexer *, int n);
-bool lex_next_is_string (struct lexer *, int n);
+bool lex_next_is_number (const struct lexer *, int n);
+double lex_next_number (const struct lexer *, int n);
+bool lex_next_is_integer (const struct lexer *, int n);
+long lex_next_integer (const struct lexer *, int n);
+bool lex_next_is_string (const struct lexer *, int n);
/* Token matching functions. */
bool lex_match (struct lexer *, enum token_type);
int lex_end_of_command (struct lexer *);
void lex_error_expecting (struct lexer *, const char *, ...) SENTINEL(0);
+#define lex_error_expecting(...) \
+ lex_error_expecting(__VA_ARGS__, NULL_SENTINEL)
void lex_sbc_only_once (const char *);
void lex_sbc_missing (const char *);