1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/* Lists of symbols for Bison
Copyright (C) 2002, 2005, 2006 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
Bison is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
Bison is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bison; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#ifndef SYMLIST_H_
# define SYMLIST_H_
# include "location.h"
# include "symtab.h"
/* A list of symbols, used during the parsing to store the rules. */
typedef struct symbol_list
{
/**
* Whether this node contains a symbol, a semantic type, a \c <*>, or a
* \c <!>.
*/
enum {
SYMLIST_SYMBOL, SYMLIST_TYPE,
SYMLIST_DEFAULT_TAGGED, SYMLIST_DEFAULT_TAGLESS
} content_type;
union {
/** The symbol or \c NULL iff <tt>node_type = SYMLIST_SYMBOL</tt>. */
symbol *sym;
/** The semantic type iff <tt>node_type = SYMLIST_TYPE</tt>. */
uniqstr type_name;
} content;
location location;
/* If this symbol is the generated lhs for a midrule but this is the rule in
whose rhs it appears, MIDRULE = a pointer to that midrule. */
struct symbol_list *midrule;
/* If this symbol is the generated lhs for a midrule and this is that
midrule, MIDRULE_PARENT_RULE = a pointer to the rule in whose rhs it
appears, and MIDRULE_PARENT_RHS_INDEX = its rhs index (1-origin) in the
parent rule. */
struct symbol_list *midrule_parent_rule;
int midrule_parent_rhs_index;
/* The action is attached to the LHS of a rule. */
const char *action;
location action_location;
/* Whether this symbol's value is used in the current action. */
bool used;
/* Precedence/associativity. */
symbol *ruleprec;
int dprec;
int merger;
location merger_declaration_location;
/* The list. */
struct symbol_list *next;
} symbol_list;
/** Create a list containing \c sym at \c loc. */
symbol_list *symbol_list_sym_new (symbol *sym, location loc);
/** Create a list containing \c type_name at \c loc. */
symbol_list *symbol_list_type_new (uniqstr type_name, location loc);
/** Create a list containing a \c <*> at \c loc. */
symbol_list *symbol_list_default_tagged_new (location loc);
/** Create a list containing a \c <!> at \c loc. */
symbol_list *symbol_list_default_tagless_new (location loc);
/** Print this list.
\pre For every node \c n in the list, <tt>n->content_type =
SYMLIST_SYMBOL</tt>. */
void symbol_list_syms_print (const symbol_list *l, FILE *f);
/** Prepend \c node to \c list. */
symbol_list *symbol_list_prepend (symbol_list *list, symbol_list *node);
/** Free \c list, but not the items it contains. */
void symbol_list_free (symbol_list *list);
/** Return the length of \c l. */
int symbol_list_length (symbol_list const *l);
/** Get item \c n in symbol list \c l. */
symbol_list *symbol_list_n_get (symbol_list *l, int n);
/* Get the data type (alternative in the union) of the value for
symbol N in rule RULE. */
uniqstr symbol_list_n_type_name_get (symbol_list *l, location loc, int n);
/** The item \c n in symbol list \c l is \c used. */
void symbol_list_n_used_set (symbol_list *l, int n, bool used);
/** Set the \c \%destructor for \c node as \c destructor at \c loc. */
void symbol_list_destructor_set (symbol_list *node, const char *destructor,
location loc);
/** Set the \c \%printer for \c node as \c printer at \c loc. */
void symbol_list_printer_set (symbol_list *node, const char *printer,
location loc);
#endif /* !SYMLIST_H_ */
|
