/* Input parser for bison
- Copyright 1984, 1986, 1989, 1992, 1998, 2000
+ Copyright 1984, 1986, 1989, 1992, 1998, 2000, 2001
Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
}
prev = t;
-
}
}
int c;
int count = 0;
struct obstack union_obstack;
+ const char *prologue = "\
+#ifndef YYSTYPE\n\
+typedef union";
+ const char *epilogue = "\
+ yystype;\n\
+# define YYSTYPE yystype\n\
+#endif\n";
if (typed)
complain (_("multiple %s declarations"), "%union");
typed = 1;
+ /* FIXME: I'm worried: are you sure attrs_obstack is properly
+ filled? */
+ /* I don't see any reasons to keep this line, because we should
+ create a special skeleton for this option. */
if (no_lines_flag)
obstack_1grow (&attrs_obstack, '\n');
obstack_init (&union_obstack);
obstack_sgrow (&union_obstack, "union");
if (defines_flag)
- obstack_sgrow (&defines_obstack, "typedef union");
+ obstack_sgrow (&defines_obstack, prologue);
c = getc (finput);
/* If C contains '/', it is output by copy_comment (). */
if (c != '/')
{
- obstack_1grow (&attrs_obstack, c);
+ obstack_1grow (&union_obstack, c);
if (defines_flag)
obstack_1grow (&defines_obstack, c);
}
if (count <= 0)
{
if (defines_flag)
- obstack_sgrow (&defines_obstack, " YYSTYPE;\n");
+ obstack_sgrow (&defines_obstack, epilogue);
/* JF don't choke on trailing semi */
c = skip_white_space ();
if (c != ';')
token_t token;
struct bucket *symbol;
char *typename = 0;
- int usrtoknum;
+ int usrtoknum = SUNDEF;
token = lex (); /* fetch typename or first token */
if (token == tok_typename)
usrtoknum = numval;
token = lex (); /* okay, did number, now get literal */
}
- else
- usrtoknum = 0;
/* process literal string token */
static void
read_declarations (void)
{
- int c;
- int tok;
-
for (;;)
{
- c = skip_white_space ();
+ int c = skip_white_space ();
if (c == '%')
{
- tok = parse_percent_token ();
+ token_t tok = parse_percent_token ();
switch (tok)
{
case tok_noop:
break;
+ case tok_stropt:
+ case tok_intopt:
+ case tok_obsolete:
+ case tok_illegal:
+ abort ();
+ break;
+
default:
complain (_("unrecognized: %s"), token_buffer);
skip_to_char ('%');
}
\f
-static void
-record_rule_line (void)
-{
- /* Record each rule's source line number in rline table. */
-
- if (nrules >= rline_allocated)
- {
- rline_allocated = nrules * 2;
- rline = XREALLOC (rline, short, rline_allocated);
- }
- rline[nrules] = lineno;
-}
-
-
/*-------------------------------------------------------------------.
| Generate a dummy symbol, a nonterminal, whose name cannot conflict |
| with the user's names. |
nrules++;
nitems++;
- record_rule_line ();
-
p = XCALLOC (symbol_list, 1);
p->sym = lhs;
just read can belong to it. */
nrules++;
nitems++;
- record_rule_line ();
p = XCALLOC (symbol_list, 1);
if (crule1)
crule1->next = p;
grammar = p;
p->sym = sdummy;
crule1 = XCALLOC (symbol_list, 1);
- p->next = crule1;
crule1->next = crule;
+ p->next = crule1;
+
/* Insert the dummy generated by that rule into this
rule. */
nitems++;
}
+/*------------------------------------------------------------------.
+| Set TOKEN_TRANSLATIONS. Check that no two symbols share the same |
+| number. |
+`------------------------------------------------------------------*/
+
+static void
+token_translations_init (void)
+{
+ bucket *bp = NULL;
+ int i;
+
+ token_translations = XCALLOC (short, max_user_token_number + 1);
+
+ /* Initialize all entries for literal tokens to 2, the internal
+ token number for $undefined., which represents all invalid
+ inputs. */
+ for (i = 0; i <= max_user_token_number; i++)
+ token_translations[i] = 2;
+
+ for (bp = firstsymbol; bp; bp = bp->next)
+ {
+ /* Non-terminal? */
+ if (bp->value >= ntokens)
+ continue;
+ /* A token string alias? */
+ if (bp->user_token_number == SALIAS)
+ continue;
+
+ assert (bp->user_token_number != SUNDEF);
+
+ /* A token which translation has already been set? */
+ if (token_translations[bp->user_token_number] != 2)
+ complain (_("tokens %s and %s both assigned number %d"),
+ tags[token_translations[bp->user_token_number]],
+ bp->tag, bp->user_token_number);
+ token_translations[bp->user_token_number] = bp->value;
+ }
+}
+
+
/*------------------------------------------------------------------.
| Assign symbol numbers, and write definition of token names into |
| FDEFINES. Set up vectors TAGS and SPREC of names and precedences |
{
bucket *bp = NULL;
int tokno = 1;
- int i, j;
int last_user_token_number;
static char DOLLAR[] = "$";
tags = XCALLOC (char *, nsyms + 1);
- tags[0] = DOLLAR;
user_toknums = XCALLOC (short, nsyms + 1);
- user_toknums[0] = 0;
sprec = XCALLOC (short, nsyms);
sassoc = XCALLOC (short, nsyms);
+ /* The EOF token. */
+ tags[0] = DOLLAR;
+ user_toknums[0] = 0;
+
max_user_token_number = 256;
last_user_token_number = 256;
if (bp->class == token_sym)
{
- if (!bp->user_token_number)
+ if (bp->user_token_number == SUNDEF)
bp->user_token_number = ++last_user_token_number;
if (bp->user_token_number > max_user_token_number)
max_user_token_number = bp->user_token_number;
sassoc[bp->value] = bp->assoc;
}
- token_translations = XCALLOC (short, max_user_token_number + 1);
+ token_translations_init ();
- /* initialize all entries for literal tokens to 2, the internal
- token number for $undefined., which represents all invalid
- inputs. */
- for (j = 0; j <= max_user_token_number; j++)
- token_translations[j] = 2;
+ error_token_number = errtoken->value;
- for (bp = firstsymbol; bp; bp = bp->next)
- {
- if (bp->value >= ntokens)
- continue; /* non-terminal */
- if (bp->user_token_number == SALIAS)
- continue;
- if (token_translations[bp->user_token_number] != 2)
- complain (_("tokens %s and %s both assigned number %d"),
- tags[token_translations[bp->user_token_number]],
- bp->tag, bp->user_token_number);
- token_translations[bp->user_token_number] = bp->value;
- }
+ if (startval->class == unknown_sym)
+ fatal (_("the start symbol %s is undefined"), startval->tag);
+ else if (startval->class == token_sym)
+ fatal (_("the start symbol %s is a token"), startval->tag);
- error_token_number = errtoken->value;
+ start_symbol = startval->value;
+}
+
+
+/*-----------------------------------.
+| Output definition of token names. |
+`-----------------------------------*/
+static void
+symbols_output (void)
+{
{
struct obstack tokendefs;
obstack_init (&tokendefs);
output_token_defines (&table_obstack);
#endif
- if (startval->class == unknown_sym)
- fatal (_("the start symbol %s is undefined"), startval->tag);
- else if (startval->class == token_sym)
- fatal (_("the start symbol %s is a token"), startval->tag);
-
- start_symbol = startval->value;
-
if (defines_flag)
{
output_token_defines (&defines_obstack);
}
if (semantic_parser)
- for (i = ntokens; i < nsyms; i++)
- {
- /* don't make these for dummy nonterminals made by gensym. */
- if (*tags[i] != '@')
- obstack_fgrow2 (&defines_obstack,
- "# define\tNT%s\t%d\n", tags[i], i);
- }
+ {
+ int i;
+
+ for (i = ntokens; i < nsyms; i++)
+ {
+ /* don't make these for dummy nonterminals made by gensym. */
+ if (*tags[i] != '@')
+ obstack_fgrow2 (&defines_obstack,
+ "# define\tNT%s\t%d\n", tags[i], i);
+ }
#if 0
- /* `fdefines' is now a temporary file, so we need to copy its
- contents in `done', so we can't close it here. */
- fclose (fdefines);
- fdefines = NULL;
+ /* `fdefines' is now a temporary file, so we need to copy its
+ contents in `done', so we can't close it here. */
+ fclose (fdefines);
+ fdefines = NULL;
#endif
+ }
}
}
bucket *ruleprec;
ritem = XCALLOC (short, nitems + 1);
- rlhs = XCALLOC (short, nrules) - 1;
- rrhs = XCALLOC (short, nrules) - 1;
- rprec = XCALLOC (short, nrules) - 1;
- rprecsym = XCALLOC (short, nrules) - 1;
- rassoc = XCALLOC (short, nrules) - 1;
+ rule_table = XCALLOC (rule_t, nrules) - 1;
itemno = 0;
ruleno = 1;
p = grammar;
while (p)
{
- rlhs[ruleno] = p->sym->value;
- rrhs[ruleno] = itemno;
+ rule_table[ruleno].lhs = p->sym->value;
+ rule_table[ruleno].rhs = itemno;
+ rule_table[ruleno].line = p->sym->line;
ruleprec = p->ruleprec;
p = p->next;
of the last token in it. */
if (p->sym->class == token_sym)
{
- rprec[ruleno] = p->sym->prec;
- rassoc[ruleno] = p->sym->assoc;
+ rule_table[ruleno].prec = p->sym->prec;
+ rule_table[ruleno].assoc = p->sym->assoc;
}
if (p)
p = p->next;
the specified symbol's precedence replaces the default. */
if (ruleprec)
{
- rprec[ruleno] = ruleprec->prec;
- rassoc[ruleno] = ruleprec->assoc;
- rprecsym[ruleno] = ruleprec->value;
+ rule_table[ruleno].prec = ruleprec->prec;
+ rule_table[ruleno].assoc = ruleprec->assoc;
+ rule_table[ruleno].precsym = ruleprec->value;
}
ritem[itemno++] = -ruleno;
nvars = 0;
nrules = 0;
nitems = 0;
- rline_allocated = 10;
- rline = XCALLOC (short, rline_allocated);
typed = 0;
lastprec = 0;
/* Assign the symbols their symbol numbers. Write #defines for the
token symbols into FDEFINES if requested. */
packsymbols ();
+ symbols_output ();
/* Convert the grammar into the format described in gram.h. */
packgram ();
+ /* Output the headers. */
+ symbols_output ();
}
projects / bison.git / blobdiff