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/* Lists of symbols for Bison
Copyright (C) 2002, 2005-2007, 2009-2015, 2018-2020 Free Software
Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
This program 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 3 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include "system.h"
#include "symlist.h"
/*--------------------------------------.
| Create a list containing SYM at LOC. |
`--------------------------------------*/
symbol_list *
symbol_list_sym_new (symbol *sym, location loc)
{
symbol_list *res = xmalloc (sizeof *res);
res->content_type = SYMLIST_SYMBOL;
res->content.sym = sym;
res->sym_loc = loc;
res->named_ref = NULL;
res->midrule = NULL;
res->midrule_parent_rule = NULL;
res->midrule_parent_rhs_index = 0;
/* Members used for LHS only. */
res->rhs_loc = empty_loc;
res->ruleprec = NULL;
res->percent_empty_loc = empty_loc;
code_props_none_init (&res->action_props);
res->dprec = 0;
res->dprec_loc = empty_loc;
res->merger = 0;
res->merger_declaration_loc = empty_loc;
res->expected_sr_conflicts = -1;
res->expected_rr_conflicts = -1;
res->next = NULL;
return res;
}
/*--------------------------------------------.
| Create a list containing TYPE_NAME at LOC. |
`--------------------------------------------*/
symbol_list *
symbol_list_type_new (uniqstr type_name, location loc)
{
symbol_list *res = xmalloc (sizeof *res);
res->content_type = SYMLIST_TYPE;
res->content.sem_type = xmalloc (sizeof (semantic_type));
res->content.sem_type->tag = type_name;
res->content.sem_type->location = loc;
res->content.sem_type->status = undeclared;
res->sym_loc = loc;
res->named_ref = NULL;
res->next = NULL;
return res;
}
symbol_list *
symbol_list_type_set (symbol_list *syms, uniqstr type_name, location loc)
{
for (symbol_list *l = syms; l; l = l->next)
symbol_type_set (l->content.sym, type_name, loc);
return syms;
}
/*-----------------------------------------------------------------------.
| Print this list, for which every content_type must be SYMLIST_SYMBOL. |
`-----------------------------------------------------------------------*/
void
symbol_list_syms_print (const symbol_list *l, FILE *f)
{
fputc ('[', f);
char const *sep = "";
for (/* Nothing. */; l && l->content.sym; l = l->next)
{
fputs (sep, f);
fputs (l->content_type == SYMLIST_SYMBOL ? "symbol: "
: l->content_type == SYMLIST_TYPE ? "type: "
: "invalid content_type: ",
f);
if (l->content_type == SYMLIST_SYMBOL)
symbol_print (l->content.sym, f);
fputs (l->action_props.is_value_used ? " (used)" : " (unused)", f);
sep = ", ";
}
fputc (']', f);
}
/*---------------------------.
| Prepend NODE to the LIST. |
`---------------------------*/
symbol_list *
symbol_list_prepend (symbol_list *list, symbol_list *node)
{
node->next = list;
return node;
}
/*-------------------------.
| Append NODE to the LIST. |
`-------------------------*/
symbol_list *
symbol_list_append (symbol_list *list, symbol_list *node)
{
if (!list)
return node;
symbol_list *next = list;
while (next->next)
next = next->next;
next->next = node;
return list;
}
/*-----------------------------------------------.
| Free the LIST, but not the items it contains. |
`-----------------------------------------------*/
void
symbol_list_free (symbol_list *list)
{
for (symbol_list *next; list; list = next)
{
next = list->next;
named_ref_free (list->named_ref);
if (list->content_type == SYMLIST_TYPE)
free (list->content.sem_type);
free (list);
}
}
/*--------------------.
| Return its length. |
`--------------------*/
int
symbol_list_length (symbol_list const *l)
{
int res = 0;
for (/* Nothing. */;
l && !(l->content_type == SYMLIST_SYMBOL && l->content.sym == NULL);
l = l->next)
++res;
return res;
}
/*------------------------------.
| Get item N in symbol list L. |
`------------------------------*/
symbol_list *
symbol_list_n_get (symbol_list *l, int n)
{
aver (0 <= n);
for (int i = 0; i < n; ++i)
{
l = l->next;
aver (l);
}
aver (l->content_type == SYMLIST_SYMBOL);
aver (l->content.sym);
return l;
}
/*--------------------------------------------------------------.
| Get the data type (alternative in the union) of the value for |
| symbol N in symbol list L. |
`--------------------------------------------------------------*/
uniqstr
symbol_list_n_type_name_get (symbol_list *l, int n)
{
return symbol_list_n_get (l, n)->content.sym->content->type_name;
}
bool
symbol_list_null (symbol_list *node)
{
return (!node
|| (node->content_type == SYMLIST_SYMBOL && !node->content.sym));
}
void
symbol_list_code_props_set (symbol_list *node, code_props_type kind,
code_props const *cprops)
{
switch (node->content_type)
{
case SYMLIST_SYMBOL:
symbol_code_props_set (node->content.sym, kind, cprops);
if (node->content.sym->content->status == undeclared)
node->content.sym->content->status = used;
break;
case SYMLIST_TYPE:
semantic_type_code_props_set
(semantic_type_get (node->content.sem_type->tag,
&node->content.sem_type->location),
kind, cprops);
if (node->content.sem_type->status == undeclared)
node->content.sem_type->status = used;
break;
}
}
|
