70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*
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* Author: Ceriel J.H. Jacobs
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*/
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/* T O K E N D E S C R I P T O R D E F I N I T I O N */
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/* $Id$ */
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#include "real.h"
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/* Structure to store a string constant
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*/
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struct string {
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unsigned s_length; /* length of a string */
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char *s_str; /* the string itself */
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};
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union tk_attr {
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struct string *tk_str;
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arith tk_int;
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struct real *tk_real;
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struct {
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union {
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arith *tky_set;
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struct idf *tky_idf;
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struct def *tky_def;
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} tk_yy;
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struct node *tky_next;
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} tk_y;
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struct {
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struct node *tkx_left, *tkx_right;
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} tk_x;
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};
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#define tk_left tk_x.tkx_left
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#define tk_right tk_x.tkx_right
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#define tk_next tk_y.tky_next
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#define tk_idf tk_y.tk_yy.tky_idf
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#define tk_def tk_y.tk_yy.tky_def
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#define tk_set tk_y.tk_yy.tky_set
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/* Token structure. Keep it small, as it is part of a parse-tree node
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*/
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struct token {
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short tk_symb; /* token itself */
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unsigned short tk_lineno; /* linenumber on which it occurred */
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union tk_attr tk_data;
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};
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typedef struct token t_token;
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#define TOK_IDF tk_data.tk_idf
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#define TOK_SSTR tk_data.tk_str
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#define TOK_STR tk_data.tk_str->s_str
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#define TOK_SLE tk_data.tk_str->s_length
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#define TOK_INT tk_data.tk_int
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#define TOK_REAL tk_data.tk_real
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#define TOK_RSTR tk_data.tk_real->r_real
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#define TOK_RVAL tk_data.tk_real->r_val
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extern t_token dot, aside;
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extern struct type *toktype;
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#define DOT dot.tk_symb
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#define ASIDE aside.tk_symb
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extern int token_nmb;
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extern int tk_nmb_at_last_syn_err;
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