1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000, 2006 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #include <libpspp/message.h>
28 #include <libpspp/alloc.h>
29 #include <libpspp/assertion.h>
30 #include <language/command.h>
31 #include <libpspp/message.h>
32 #include <libpspp/magic.h>
33 #include <data/settings.h>
34 #include <libpspp/getl.h>
35 #include <libpspp/str.h>
40 #define _(msgid) gettext (msgid)
41 #define N_(msgid) msgid
49 struct string line_buffer;
51 struct source_stream *ss;
53 int token; /* Current token. */
54 double tokval; /* T_POS_NUM, T_NEG_NUM: the token's value. */
56 char tokid [LONG_NAME_LEN + 1]; /* T_ID: the identifier. */
58 struct string tokstr; /* T_ID, T_STRING: token string value.
59 For T_ID, this is not truncated as is
62 char *prog; /* Pointer to next token in line_buffer. */
63 bool dot; /* True only if this line ends with a terminal dot. */
65 int put_token ; /* If nonzero, next token returned by lex_get().
66 Used only in exceptional circumstances. */
68 struct string put_tokstr;
73 static int parse_id (struct lexer *);
75 /* How a string represents its contents. */
78 CHARACTER_STRING, /* Characters. */
79 BINARY_STRING, /* Binary digits. */
80 OCTAL_STRING, /* Octal digits. */
81 HEX_STRING /* Hexadecimal digits. */
84 static int parse_string (struct lexer *, enum string_type);
87 static void dump_token (struct lexer *);
92 /* Initializes the lexer. */
94 lex_create (struct source_stream *ss)
96 struct lexer *lexer = xzalloc (sizeof (*lexer));
98 ds_init_empty (&lexer->tokstr);
99 ds_init_empty (&lexer->put_tokstr);
100 ds_init_empty (&lexer->line_buffer);
106 struct source_stream *
107 lex_get_source_stream (const struct lexer *lex)
114 lex_destroy (struct lexer *lexer)
118 ds_destroy (&lexer->put_tokstr);
119 ds_destroy (&lexer->tokstr);
120 ds_destroy (&lexer->line_buffer);
127 /* Common functions. */
129 /* Copies put_token, lexer->put_tokstr, put_tokval into token, tokstr,
130 tokval, respectively, and sets tokid appropriately. */
132 restore_token (struct lexer *lexer)
134 assert (lexer->put_token != 0);
135 lexer->token = lexer->put_token;
136 ds_assign_string (&lexer->tokstr, &lexer->put_tokstr);
137 str_copy_trunc (lexer->tokid, sizeof lexer->tokid, ds_cstr (&lexer->tokstr));
138 lexer->tokval = lexer->put_tokval;
139 lexer->put_token = 0;
142 /* Copies token, tokstr, lexer->tokval into lexer->put_token, put_tokstr,
143 put_lexer->tokval respectively. */
145 save_token (struct lexer *lexer)
147 lexer->put_token = lexer->token;
148 ds_assign_string (&lexer->put_tokstr, &lexer->tokstr);
149 lexer->put_tokval = lexer->tokval;
152 /* Parses a single token, setting appropriate global variables to
153 indicate the token's attributes. */
155 lex_get (struct lexer *lexer)
160 if (NULL == lexer->prog && ! lex_get_line (lexer) )
162 lexer->token = T_STOP;
166 /* If a token was pushed ahead, return it. */
167 if (lexer->put_token)
169 restore_token (lexer);
178 /* Skip whitespace. */
179 while (isspace ((unsigned char) *lexer->prog))
194 else if (!lex_get_line (lexer))
197 lexer->token = T_STOP;
204 if (lexer->put_token)
206 restore_token (lexer);
215 /* Actually parse the token. */
216 ds_clear (&lexer->tokstr);
218 switch (*lexer->prog)
221 case '0': case '1': case '2': case '3': case '4':
222 case '5': case '6': case '7': case '8': case '9':
226 /* `-' can introduce a negative number, or it can be a
227 token by itself. If it is not followed by a digit or a
228 decimal point, it is definitely not a number.
229 Otherwise, it might be either, but most of the time we
230 want it as a number. When the syntax calls for a `-'
231 token, lex_negative_to_dash() must be used to break
232 negative numbers into two tokens. */
233 if (*lexer->prog == '-')
235 ds_put_char (&lexer->tokstr, *lexer->prog++);
236 while (isspace ((unsigned char) *lexer->prog))
239 if (!isdigit ((unsigned char) *lexer->prog) && *lexer->prog != '.')
244 lexer->token = T_NEG_NUM;
247 lexer->token = T_POS_NUM;
249 /* Parse the number, copying it into tokstr. */
250 while (isdigit ((unsigned char) *lexer->prog))
251 ds_put_char (&lexer->tokstr, *lexer->prog++);
252 if (*lexer->prog == '.')
254 ds_put_char (&lexer->tokstr, *lexer->prog++);
255 while (isdigit ((unsigned char) *lexer->prog))
256 ds_put_char (&lexer->tokstr, *lexer->prog++);
258 if (*lexer->prog == 'e' || *lexer->prog == 'E')
260 ds_put_char (&lexer->tokstr, *lexer->prog++);
261 if (*lexer->prog == '+' || *lexer->prog == '-')
262 ds_put_char (&lexer->tokstr, *lexer->prog++);
263 while (isdigit ((unsigned char) *lexer->prog))
264 ds_put_char (&lexer->tokstr, *lexer->prog++);
267 /* Parse as floating point. */
268 lexer->tokval = strtod (ds_cstr (&lexer->tokstr), &tail);
271 msg (SE, _("%s does not form a valid number."),
272 ds_cstr (&lexer->tokstr));
275 ds_clear (&lexer->tokstr);
276 ds_put_char (&lexer->tokstr, '0');
283 lexer->token = parse_string (lexer, CHARACTER_STRING);
286 case '(': case ')': case ',': case '=': case '+': case '/':
287 lexer->token = *lexer->prog++;
291 if (*++lexer->prog == '*')
294 lexer->token = T_EXP;
301 if (*++lexer->prog == '=')
306 else if (*lexer->prog == '>')
316 if (*++lexer->prog == '=')
326 if (*++lexer->prog == '=')
332 lexer->token = T_NOT;
337 lexer->token = T_AND;
346 if (lexer->prog[1] == '\'' || lexer->prog[1] == '"')
347 lexer->token = parse_string (lexer, BINARY_STRING);
349 lexer->token = parse_id (lexer);
353 if (lexer->prog[1] == '\'' || lexer->prog[1] == '"')
354 lexer->token = parse_string (lexer, OCTAL_STRING);
356 lexer->token = parse_id (lexer);
360 if (lexer->prog[1] == '\'' || lexer->prog[1] == '"')
361 lexer->token = parse_string (lexer, HEX_STRING);
363 lexer->token = parse_id (lexer);
367 if (lex_is_id1 (*lexer->prog))
369 lexer->token = parse_id (lexer);
374 if (isgraph ((unsigned char) *lexer->prog))
375 msg (SE, _("Bad character in input: `%c'."), *lexer->prog++);
377 msg (SE, _("Bad character in input: `\\%o'."), *lexer->prog++);
389 /* Parses an identifier at the current position into tokid and
391 Returns the correct token type. */
393 parse_id (struct lexer *lexer)
395 struct substring rest_of_line
396 = ss_substr (ds_ss (&lexer->line_buffer),
397 ds_pointer_to_position (&lexer->line_buffer, lexer->prog),
399 struct substring id = ss_head (rest_of_line,
400 lex_id_get_length (rest_of_line));
401 lexer->prog += ss_length (id);
403 ds_assign_substring (&lexer->tokstr, id);
404 str_copy_trunc (lexer->tokid, sizeof lexer->tokid, ds_cstr (&lexer->tokstr));
405 return lex_id_to_token (id);
408 /* Reports an error to the effect that subcommand SBC may only be
411 lex_sbc_only_once (const char *sbc)
413 msg (SE, _("Subcommand %s may only be specified once."), sbc);
416 /* Reports an error to the effect that subcommand SBC is
419 lex_sbc_missing (struct lexer *lexer, const char *sbc)
421 lex_error (lexer, _("missing required subcommand %s"), sbc);
424 /* Prints a syntax error message containing the current token and
425 given message MESSAGE (if non-null). */
427 lex_error (struct lexer *lexer, const char *message, ...)
432 token_rep = lex_token_representation (lexer);
433 if (lexer->token == T_STOP)
434 strcpy (where, "end of file");
435 else if (lexer->token == '.')
436 strcpy (where, "end of command");
438 snprintf (where, sizeof where, "`%s'", token_rep);
446 va_start (args, message);
447 vsnprintf (buf, 1024, message, args);
450 msg (SE, _("Syntax error %s at %s."), buf, where);
453 msg (SE, _("Syntax error at %s."), where);
456 /* Checks that we're at end of command.
457 If so, returns a successful command completion code.
458 If not, flags a syntax error and returns an error command
461 lex_end_of_command (struct lexer *lexer)
463 if (lexer->token != '.')
465 lex_error (lexer, _("expecting end of command"));
472 /* Token testing functions. */
474 /* Returns true if the current token is a number. */
476 lex_is_number (struct lexer *lexer)
478 return lexer->token == T_POS_NUM || lexer->token == T_NEG_NUM;
482 /* Returns true if the current token is a string. */
484 lex_is_string (struct lexer *lexer)
486 return lexer->token == T_STRING;
490 /* Returns the value of the current token, which must be a
491 floating point number. */
493 lex_number (struct lexer *lexer)
495 assert (lex_is_number (lexer));
496 return lexer->tokval;
499 /* Returns true iff the current token is an integer. */
501 lex_is_integer (struct lexer *lexer)
503 return (lex_is_number (lexer)
504 && lexer->tokval != NOT_LONG
505 && lexer->tokval >= LONG_MIN
506 && lexer->tokval <= LONG_MAX
507 && floor (lexer->tokval) == lexer->tokval);
510 /* Returns the value of the current token, which must be an
513 lex_integer (struct lexer *lexer)
515 assert (lex_is_integer (lexer));
516 return lexer->tokval;
519 /* Token matching functions. */
521 /* If TOK is the current token, skips it and returns true
522 Otherwise, returns false. */
524 lex_match (struct lexer *lexer, int t)
526 if (lexer->token == t)
535 /* If the current token is the identifier S, skips it and returns
536 true. The identifier may be abbreviated to its first three
538 Otherwise, returns false. */
540 lex_match_id (struct lexer *lexer, const char *s)
542 if (lexer->token == T_ID
543 && lex_id_match (ss_cstr (s), ss_cstr (lexer->tokid)))
552 /* If the current token is integer N, skips it and returns true.
553 Otherwise, returns false. */
555 lex_match_int (struct lexer *lexer, int x)
557 if (lex_is_integer (lexer) && lex_integer (lexer) == x)
566 /* Forced matches. */
568 /* If this token is identifier S, fetches the next token and returns
570 Otherwise, reports an error and returns zero. */
572 lex_force_match_id (struct lexer *lexer, const char *s)
574 if (lex_match_id (lexer, s))
578 lex_error (lexer, _("expecting `%s'"), s);
583 /* If the current token is T, skips the token. Otherwise, reports an
584 error and returns from the current function with return value false. */
586 lex_force_match (struct lexer *lexer, int t)
588 if (lexer->token == t)
595 lex_error (lexer, _("expecting `%s'"), lex_token_name (t));
600 /* If this token is a string, does nothing and returns true.
601 Otherwise, reports an error and returns false. */
603 lex_force_string (struct lexer *lexer)
605 if (lexer->token == T_STRING)
609 lex_error (lexer, _("expecting string"));
614 /* If this token is an integer, does nothing and returns true.
615 Otherwise, reports an error and returns false. */
617 lex_force_int (struct lexer *lexer)
619 if (lex_is_integer (lexer))
623 lex_error (lexer, _("expecting integer"));
628 /* If this token is a number, does nothing and returns true.
629 Otherwise, reports an error and returns false. */
631 lex_force_num (struct lexer *lexer)
633 if (lex_is_number (lexer))
636 lex_error (lexer, _("expecting number"));
640 /* If this token is an identifier, does nothing and returns true.
641 Otherwise, reports an error and returns false. */
643 lex_force_id (struct lexer *lexer)
645 if (lexer->token == T_ID)
648 lex_error (lexer, _("expecting identifier"));
652 /* Weird token functions. */
654 /* Returns the first character of the next token, except that if the
655 next token is not an identifier, the character returned will not be
656 a character that can begin an identifier. Specifically, the
657 hexstring lead-in X' causes lookahead() to return '. Note that an
658 alphanumeric return value doesn't guarantee an ID token, it could
659 also be a reserved-word token. */
661 lex_look_ahead (struct lexer *lexer)
663 if (lexer->put_token)
664 return lexer->put_token;
668 if (NULL == lexer->prog && ! lex_get_line (lexer) )
673 while (isspace ((unsigned char) *lexer->prog))
680 else if (!lex_get_line (lexer))
683 if (lexer->put_token)
684 return lexer->put_token;
687 if ((toupper ((unsigned char) *lexer->prog) == 'X'
688 || toupper ((unsigned char) *lexer->prog) == 'B'
689 || toupper ((unsigned char) *lexer->prog) == 'O')
690 && (lexer->prog[1] == '\'' || lexer->prog[1] == '"'))
697 /* Makes the current token become the next token to be read; the
698 current token is set to T. */
700 lex_put_back (struct lexer *lexer, int t)
706 /* Makes the current token become the next token to be read; the
707 current token is set to the identifier ID. */
709 lex_put_back_id (struct lexer *lexer, const char *id)
711 assert (lex_id_to_token (ss_cstr (id)) == T_ID);
714 ds_assign_cstr (&lexer->tokstr, id);
715 str_copy_trunc (lexer->tokid, sizeof lexer->tokid, ds_cstr (&lexer->tokstr));
718 /* Weird line processing functions. */
720 /* Returns the entire contents of the current line. */
722 lex_entire_line (const struct lexer *lexer)
724 return ds_cstr (&lexer->line_buffer);
727 const struct string *
728 lex_entire_line_ds (const struct lexer *lexer)
730 return &lexer->line_buffer;
733 /* As lex_entire_line(), but only returns the part of the current line
734 that hasn't already been tokenized. */
736 lex_rest_of_line (const struct lexer *lexer)
741 /* Returns true if the current line ends in a terminal dot,
744 lex_end_dot (const struct lexer *lexer)
749 /* Causes the rest of the current input line to be ignored for
750 tokenization purposes. */
752 lex_discard_line (struct lexer *lexer)
754 ds_cstr (&lexer->line_buffer); /* Ensures ds_end points to something valid */
755 lexer->prog = ds_end (&lexer->line_buffer);
757 lexer->put_token = 0;
761 /* Discards the rest of the current command.
762 When we're reading commands from a file, we skip tokens until
763 a terminal dot or EOF.
764 When we're reading commands interactively from the user,
765 that's just discarding the current line, because presumably
766 the user doesn't want to finish typing a command that will be
769 lex_discard_rest_of_command (struct lexer *lexer)
771 if (!getl_is_interactive (lexer->ss))
773 while (lexer->token != T_STOP && lexer->token != '.')
777 lex_discard_line (lexer);
780 /* Weird line reading functions. */
782 /* Remove C-style comments in STRING, begun by slash-star and
783 terminated by star-slash or newline. */
785 strip_comments (struct string *string)
793 for (cp = ds_cstr (string); *cp; )
795 /* If we're not in a comment, check for quote marks. */
800 else if (*cp == '\'' || *cp == '"')
804 /* If we're not inside a quotation, check for comment. */
807 if (cp[0] == '/' && cp[1] == '*')
814 else if (in_comment && cp[0] == '*' && cp[1] == '/')
823 /* Check commenting. */
830 /* Prepares LINE, which is subject to the given SYNTAX rules, for
831 tokenization by stripping comments and determining whether it
832 is the beginning or end of a command and storing into
833 *LINE_STARTS_COMMAND and *LINE_ENDS_COMMAND appropriately. */
835 lex_preprocess_line (struct string *line,
836 enum getl_syntax syntax,
837 bool *line_starts_command,
838 bool *line_ends_command)
840 strip_comments (line);
841 ds_rtrim (line, ss_cstr (CC_SPACES));
842 *line_ends_command = (ds_chomp (line, get_endcmd ())
843 || (ds_is_empty (line) && get_nulline ()));
844 *line_starts_command = false;
845 if (syntax == GETL_BATCH)
847 int first = ds_first (line);
848 *line_starts_command = !isspace (first);
849 if (first == '+' || first == '-')
850 *ds_data (line) = ' ';
854 /* Reads a line, without performing any preprocessing.
855 Sets *SYNTAX, if SYNTAX is non-null, to the line's syntax
858 lex_get_line_raw (struct lexer *lexer, enum getl_syntax *syntax)
860 enum getl_syntax dummy;
861 bool ok = getl_read_line (lexer->ss, &lexer->line_buffer,
862 syntax != NULL ? syntax : &dummy);
866 /* Reads a line for use by the tokenizer, and preprocesses it by
867 removing comments, stripping trailing whitespace and the
868 terminal dot, and removing leading indentors. */
870 lex_get_line (struct lexer *lexer)
872 bool line_starts_command;
873 enum getl_syntax syntax;
875 if (!lex_get_line_raw (lexer, &syntax))
881 lex_preprocess_line (&lexer->line_buffer, syntax,
882 &line_starts_command, &lexer->dot);
884 if (line_starts_command)
885 lexer->put_token = '.';
887 lexer->prog = ds_cstr (&lexer->line_buffer);
893 /* Returns the name of a token. */
895 lex_token_name (int token)
897 if (lex_is_keyword (token))
898 return lex_id_name (token);
899 else if (token < 256)
901 static char t[256][2];
911 /* Returns an ASCII representation of the current token as a
912 malloc()'d string. */
914 lex_token_representation (struct lexer *lexer)
918 switch (lexer->token)
923 return ds_xstrdup (&lexer->tokstr);
931 for (sp = ds_cstr (&lexer->tokstr); sp < ds_end (&lexer->tokstr); sp++)
932 if (!isprint ((unsigned char) *sp))
938 token_rep = xmalloc (2 + ds_length (&lexer->tokstr) * 2 + 1 + 1);
946 for (sp = ds_cstr (&lexer->tokstr); *sp; )
950 *dp++ = (unsigned char) *sp++;
953 for (sp = ds_cstr (&lexer->tokstr); sp < ds_end (&lexer->tokstr); sp++)
955 *dp++ = (((unsigned char) *sp) >> 4)["0123456789ABCDEF"];
956 *dp++ = (((unsigned char) *sp) & 15)["0123456789ABCDEF"];
966 token_rep = xmalloc (1);
971 return xstrdup ("**");
974 return xstrdup (lex_token_name (lexer->token));
980 /* Really weird functions. */
982 /* Most of the time, a `-' is a lead-in to a negative number. But
983 sometimes it's actually part of the syntax. If a dash can be part
984 of syntax then this function is called to rip it off of a
987 lex_negative_to_dash (struct lexer *lexer)
989 if (lexer->token == T_NEG_NUM)
991 lexer->token = T_POS_NUM;
992 lexer->tokval = -lexer->tokval;
993 ds_assign_substring (&lexer->tokstr, ds_substr (&lexer->tokstr, 1, SIZE_MAX));
999 /* Skip a COMMENT command. */
1001 lex_skip_comment (struct lexer *lexer)
1005 if (!lex_get_line (lexer))
1007 lexer->put_token = T_STOP;
1012 if (lexer->put_token == '.')
1015 ds_cstr (&lexer->line_buffer); /* Ensures ds_end will point to a valid char */
1016 lexer->prog = ds_end (&lexer->line_buffer);
1022 /* Private functions. */
1024 /* When invoked, tokstr contains a string of binary, octal, or
1025 hex digits, according to TYPE. The string is converted to
1026 characters having the specified values. */
1028 convert_numeric_string_to_char_string (struct lexer *lexer,
1029 enum string_type type)
1031 const char *base_name;
1041 base_name = _("binary");
1046 base_name = _("octal");
1051 base_name = _("hex");
1059 byte_cnt = ds_length (&lexer->tokstr) / chars_per_byte;
1060 if (ds_length (&lexer->tokstr) % chars_per_byte)
1061 msg (SE, _("String of %s digits has %d characters, which is not a "
1063 base_name, (int) ds_length (&lexer->tokstr), chars_per_byte);
1065 p = ds_cstr (&lexer->tokstr);
1066 for (i = 0; i < byte_cnt; i++)
1072 for (j = 0; j < chars_per_byte; j++, p++)
1076 if (*p >= '0' && *p <= '9')
1080 static const char alpha[] = "abcdef";
1081 const char *q = strchr (alpha, tolower ((unsigned char) *p));
1090 msg (SE, _("`%c' is not a valid %s digit."), *p, base_name);
1092 value = value * base + v;
1095 ds_cstr (&lexer->tokstr)[i] = (unsigned char) value;
1098 ds_truncate (&lexer->tokstr, byte_cnt);
1101 /* Parses a string from the input buffer into tokstr. The input
1102 buffer pointer lexer->prog must point to the initial single or double
1103 quote. TYPE indicates the type of string to be parsed.
1104 Returns token type. */
1106 parse_string (struct lexer *lexer, enum string_type type)
1108 if (type != CHARACTER_STRING)
1111 /* Accumulate the entire string, joining sections indicated by +
1115 /* Single or double quote. */
1116 int c = *lexer->prog++;
1118 /* Accumulate section. */
1121 /* Check end of line. */
1122 if (*lexer->prog == '\0')
1124 msg (SE, _("Unterminated string constant."));
1128 /* Double quote characters to embed them in strings. */
1129 if (*lexer->prog == c)
1131 if (lexer->prog[1] == c)
1137 ds_put_char (&lexer->tokstr, *lexer->prog++);
1141 /* Skip whitespace after final quote mark. */
1142 if (lexer->prog == NULL)
1146 while (isspace ((unsigned char) *lexer->prog))
1154 if (!lex_get_line (lexer))
1158 /* Skip plus sign. */
1159 if (*lexer->prog != '+')
1163 /* Skip whitespace after plus sign. */
1164 if (lexer->prog == NULL)
1168 while (isspace ((unsigned char) *lexer->prog))
1176 if (!lex_get_line (lexer))
1178 msg (SE, _("Unexpected end of file in string concatenation."));
1183 /* Ensure that a valid string follows. */
1184 if (*lexer->prog != '\'' && *lexer->prog != '"')
1186 msg (SE, _("String expected following `+'."));
1191 /* We come here when we've finished concatenating all the string sections
1192 into one large string. */
1194 if (type != CHARACTER_STRING)
1195 convert_numeric_string_to_char_string (lexer, type);
1197 if (ds_length (&lexer->tokstr) > 255)
1199 msg (SE, _("String exceeds 255 characters in length (%d characters)."),
1200 (int) ds_length (&lexer->tokstr));
1201 ds_truncate (&lexer->tokstr, 255);
1208 /* Reads one token from the lexer and writes a textual representation
1209 on stdout for debugging purposes. */
1211 dump_token (struct lexer *lexer)
1217 curln = getl_source_location (lexer->ss);
1218 curfn = getl_source_name (lexer->ss);
1220 fprintf (stderr, "%s:%d\t", curfn, curln);
1223 switch (lexer->token)
1226 fprintf (stderr, "ID\t%s\n", lexer->tokid);
1231 fprintf (stderr, "NUM\t%f\n", lexer->tokval);
1235 fprintf (stderr, "STRING\t\"%s\"\n", ds_cstr (&lexer->tokstr));
1239 fprintf (stderr, "STOP\n");
1243 fprintf (stderr, "MISC\tEXP\"");
1247 fprintf (stderr, "MISC\tEOF\n");
1251 if (lex_is_keyword (lexer->token))
1252 fprintf (stderr, "KEYWORD\t%s\n", lex_token_name (lexer->token));
1254 fprintf (stderr, "PUNCT\t%c\n", lexer->token);
1258 #endif /* DUMP_TOKENS */
1261 /* Token Accessor Functions */
1264 lex_token (const struct lexer *lexer)
1266 return lexer->token;
1270 lex_tokval (const struct lexer *lexer)
1272 return lexer->tokval;
1276 lex_tokid (const struct lexer *lexer)
1278 return lexer->tokid;
1281 const struct string *
1282 lex_tokstr (const struct lexer *lexer)
1284 return &lexer->tokstr;