#include "system.h"
-#include "obstack.h"
#include "quotearg.h"
#include "quote.h"
#include "getargs.h"
#include "conflicts.h"
#include "muscle_tab.h"
-/* Number of slots allocated (but not necessarily used yet) in `rline' */
-static int rline_allocated;
-
typedef struct symbol_list
{
struct symbol_list *next;
bucket *sym;
+ int line;
+ /* The action is attached to the LHS of a rule. */
+ const char *action;
+ int action_line;
bucket *ruleprec;
}
symbol_list;
static bucket *errtoken;
static bucket *undeftoken;
+
+
+static symbol_list *
+symbol_list_new (bucket *sym)
+{
+ symbol_list *res = XMALLOC (symbol_list, 1);
+ res->next = NULL;
+ res->sym = sym;
+ res->line = lineno;
+ res->ruleprec = NULL;
+ return res;
+}
+
\f
/*===================\
`--------------------------------------------------------------*/
static char *
-get_type_name (int n, symbol_list * rule)
+get_type_name (int n, symbol_list *rule)
{
int i;
symbol_list *rp;
ungetc (c, fin);
}
-/*-----------------------------------------------------------------.
-| Dump the wannabee comment from IN to OUT1 and OUT2 (which can be |
-| NULL). In fact we just saw a `/', which might or might not be a |
-| comment. In any case, copy what we saw. |
-| |
-| OUT2 might be NULL. |
-`-----------------------------------------------------------------*/
+
+/*------------------------------------------------------------------.
+| Dump the wannabee comment from IN to OOUT. In fact we just saw a |
+| `/', which might or might not be a comment. In any case, copy |
+| what we saw. |
+`------------------------------------------------------------------*/
static inline void
-copy_comment2 (FILE *fin, struct obstack *oout1, struct obstack *oout2)
+copy_comment (FILE *fin, struct obstack *oout)
{
int cplus_comment;
int ended;
int c;
/* We read a `/', output it. */
- obstack_1grow (oout1, '/');
- if (oout2)
- obstack_1grow (oout2, '/');
+ obstack_1grow (oout, '/');
switch ((c = getc (fin)))
{
return;
}
- obstack_1grow (oout1, c);
- if (oout2)
- obstack_1grow (oout2, c);
+ obstack_1grow (oout, c);
c = getc (fin);
ended = 0;
{
while (c == '*')
{
- obstack_1grow (oout1, c);
- if (oout2)
- obstack_1grow (oout2, c);
+ obstack_1grow (oout, c);
c = getc (fin);
}
if (c == '/')
{
- obstack_1grow (oout1, c);
- if (oout2)
- obstack_1grow (oout2, c);
+ obstack_1grow (oout, c);
ended = 1;
}
}
else if (c == '\n')
{
lineno++;
- obstack_1grow (oout1, c);
- if (oout2)
- obstack_1grow (oout2, c);
+ obstack_1grow (oout, c);
if (cplus_comment)
ended = 1;
else
fatal (_("unterminated comment"));
else
{
- obstack_1grow (oout1, c);
- if (oout2)
- obstack_1grow (oout2, c);
+ obstack_1grow (oout, c);
c = getc (fin);
}
}
}
-/*-------------------------------------------------------------------.
-| Dump the comment (actually the current string starting with a `/') |
-| from FIN to OOUT. |
-`-------------------------------------------------------------------*/
-
-static inline void
-copy_comment (FILE *fin, struct obstack *oout)
-{
- copy_comment2 (fin, oout, NULL);
-}
-
-
/*-----------------------------------------------------------------.
| FIN is pointing to a location (i.e., a `@'). Output to OOUT a |
| reference to this location. STACK_OFFSET is the number of values |
/* -1 while reading a character if prev char was %. */
int after_percent;
-#if 0
if (!no_lines_flag)
{
obstack_fgrow2 (&attrs_obstack, muscle_find ("linef"),
lineno, quotearg_style (c_quoting_style,
muscle_find("filename")));
}
-#endif
after_percent = 0;
else
{
complain (_("`%s' is invalid in %s"),
- token_buffer, (what_is == token_sym) ? "%token" : "%nterm");
+ token_buffer,
+ (what_is == token_sym) ? "%token" : "%nterm");
skip_to_char ('%');
}
}
{
int c;
int count = 0;
+ bool done = FALSE;
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, prologue);
- c = getc (finput);
-
- while (c != EOF)
+ while (!done)
{
+ c = xgetc (finput);
+
/* If C contains '/', it is output by copy_comment (). */
if (c != '/')
- {
- obstack_1grow (&union_obstack, c);
- if (defines_flag)
- obstack_1grow (&defines_obstack, c);
- }
+ obstack_1grow (&union_obstack, c);
switch (c)
{
break;
case '/':
- copy_comment2 (finput, &defines_obstack, &union_obstack);
+ copy_comment (finput, &union_obstack);
break;
case '{':
break;
case '}':
+ /* FIXME: Errr. How could this happen???. --akim */
if (count == 0)
complain (_("unmatched %s"), "`}'");
count--;
- if (count <= 0)
- {
- if (defines_flag)
- obstack_sgrow (&defines_obstack, epilogue);
- /* JF don't choke on trailing semi */
- c = skip_white_space ();
- if (c != ';')
- ungetc (c, finput);
- obstack_1grow (&union_obstack, 0);
- muscle_insert ("stype", obstack_finish (&union_obstack));
- return;
- }
+ if (!count)
+ done = TRUE;
+ break;
}
-
- c = getc (finput);
}
+ /* JF don't choke on trailing semi */
+ c = skip_white_space ();
+ if (c != ';')
+ ungetc (c, finput);
+ obstack_1grow (&union_obstack, 0);
+ muscle_insert ("stype", obstack_finish (&union_obstack));
}
}
+
+/*---------------------------------.
+| Parse a double quoted parameter. |
+`---------------------------------*/
+
+static const char *
+parse_dquoted_param (const char *from)
+{
+ struct obstack param_obstack;
+ const char *param = NULL;
+ int c;
+
+ obstack_init (¶m_obstack);
+ c = skip_white_space ();
+
+ if (c != '"')
+ {
+ complain (_("invalid %s declaration"), from);
+ ungetc (c, finput);
+ skip_to_char ('%');
+ return NULL;
+ }
+
+ while ((c = literalchar ()) != '"')
+ obstack_1grow (¶m_obstack, c);
+
+ obstack_1grow (¶m_obstack, '\0');
+ param = obstack_finish (¶m_obstack);
+
+ if (c != '"' || strlen (param) == 0)
+ {
+ complain (_("invalid %s declaration"), from);
+ if (c != '"')
+ ungetc (c, finput);
+ skip_to_char ('%');
+ return NULL;
+ }
+
+ return param;
+}
+
/*----------------------------------.
| Parse what comes after %skeleton. |
`----------------------------------*/
-void
+static void
parse_skel_decl (void)
{
- /* Complete with parse_dquoted_param () on the CVS branch 1.29. */
+ skeleton = parse_dquoted_param ("%skeleton");
}
/*----------------------------------------------------------------.
case tok_stropt:
case tok_intopt:
case tok_obsolete:
- case tok_illegal:
abort ();
break;
+ case tok_illegal:
default:
complain (_("unrecognized: %s"), token_buffer);
skip_to_char ('%');
{
int c;
int count;
- char buf[4096];
/* offset is always 0 if parser has already popped the stack pointer */
if (semantic_parser)
stack_offset = 0;
- obstack_fgrow1 (&action_obstack, "\ncase %d:\n", nrules);
-
- if (!no_lines_flag)
- {
- obstack_fgrow2 (&action_obstack, muscle_find ("linef"),
- lineno, quotearg_style (c_quoting_style,
- muscle_find ("filename")));
- }
- obstack_1grow (&action_obstack, '{');
-
count = 1;
c = getc (finput);
}
}
- obstack_sgrow (&action_obstack, ";\n break;}");
+ obstack_1grow (&action_obstack, '\0');
+ rule->action = obstack_finish (&action_obstack);
+ rule->action_line = lineno;
}
\f
/*-------------------------------------------------------------------.
}
\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. |
sym->value = nvars++;
return sym;
}
-
-#if 0
-/*------------------------------------------------------------------.
-| read in a %type declaration and record its information for |
-| get_type_name to access. This is unused. It is only called from |
-| the #if 0 part of readgram |
-`------------------------------------------------------------------*/
-
-static int
-get_type (void)
-{
- int k;
- token_t token;
- char *name;
-
- token = lex ();
-
- if (token != tok_typename)
- {
- complain (_("invalid %s declaration"), "%type");
- return t;
- }
-
- name = xstrdup (token_buffer);
-
- for (;;)
- {
- token = lex ();
-
- switch (token)
- {
- case tok_semicolon:
- return lex ();
-
- case tok_comma:
- break;
-
- case tok_identifier:
- if (symval->type_name == NULL)
- symval->type_name = name;
- else if (strcmp (name, symval->type_name) != 0)
- complain (_("type redeclaration for %s"), symval->tag);
-
- break;
-
- default:
- return token;
- }
- }
-}
-
-#endif
\f
-/*------------------------------------------------------------------.
-| Parse the input grammar into a one symbol_list structure. Each |
-| rule is represented by a sequence of symbols: the left hand side |
-| followed by the contents of the right hand side, followed by a |
-| null pointer instead of a symbol to terminate the rule. The next |
-| symbol is the lhs of the following rule. |
-| |
-| All guards and actions are copied out to the appropriate files, |
-| labelled by the rule number they apply to. |
-`------------------------------------------------------------------*/
+/*-------------------------------------------------------------------.
+| Parse the input grammar into a one symbol_list structure. Each |
+| rule is represented by a sequence of symbols: the left hand side |
+| followed by the contents of the right hand side, followed by a |
+| null pointer instead of a symbol to terminate the rule. The next |
+| symbol is the lhs of the following rule. |
+| |
+| All guards and actions are copied out to the appropriate files, |
+| labelled by the rule number they apply to. |
+| |
+| Bison used to allow some %directives in the rules sections, but |
+| this is no longer consider appropriate: (i) the documented grammar |
+| doesn't claim it, (ii), it would promote bad style, (iii), error |
+| recovery for %directives consists in skipping the junk until a `%' |
+| is seen and helrp synchronizing. This scheme is definitely wrong |
+| in the rules section. |
+`-------------------------------------------------------------------*/
static void
readgram (void)
{
token_t t;
bucket *lhs = NULL;
- symbol_list *p;
- symbol_list *p1;
+ symbol_list *p = NULL;
+ symbol_list *p1 = NULL;
bucket *bp;
/* Points to first symbol_list of current rule. its symbol is the
lhs of the rule. */
- symbol_list *crule;
+ symbol_list *crule = NULL;
/* Points to the symbol_list preceding crule. */
- symbol_list *crule1;
-
- p1 = NULL;
+ symbol_list *crule1 = NULL;
t = lex ();
while (t != tok_two_percents && t != tok_eof)
- {
- if (t == tok_identifier || t == tok_bar)
- {
- int action_flag = 0;
- /* Number of symbols in rhs of this rule so far */
- int rulelength = 0;
- int xactions = 0; /* JF for error checking */
- bucket *first_rhs = 0;
-
- if (t == tok_identifier)
- {
- lhs = symval;
-
- if (!start_flag)
- {
- startval = lhs;
- start_flag = 1;
- }
-
- t = lex ();
- if (t != tok_colon)
- {
- complain (_("ill-formed rule: initial symbol not followed by colon"));
- unlex (t);
- }
- }
-
- if (nrules == 0 && t == tok_bar)
- {
- complain (_("grammar starts with vertical bar"));
- lhs = symval; /* BOGUS: use a random symval */
- }
- /* start a new rule and record its lhs. */
-
- nrules++;
- nitems++;
-
- record_rule_line ();
+ if (t == tok_identifier || t == tok_bar)
+ {
+ int action_flag = 0;
+ /* Number of symbols in rhs of this rule so far */
+ int rulelength = 0;
+ int xactions = 0; /* JF for error checking */
+ bucket *first_rhs = 0;
+
+ if (t == tok_identifier)
+ {
+ lhs = symval;
+
+ if (!start_flag)
+ {
+ startval = lhs;
+ start_flag = 1;
+ }
- p = XCALLOC (symbol_list, 1);
- p->sym = lhs;
+ t = lex ();
+ if (t != tok_colon)
+ {
+ complain (_("ill-formed rule: initial symbol not followed by colon"));
+ unlex (t);
+ }
+ }
+
+ if (nrules == 0 && t == tok_bar)
+ {
+ complain (_("grammar starts with vertical bar"));
+ lhs = symval; /* BOGUS: use a random symval */
+ }
+ /* start a new rule and record its lhs. */
+
+ nrules++;
+ nitems++;
+
+ p = symbol_list_new (lhs);
+
+ crule1 = p1;
+ if (p1)
+ p1->next = p;
+ else
+ grammar = p;
- crule1 = p1;
- if (p1)
- p1->next = p;
- else
- grammar = p;
+ p1 = p;
+ crule = p;
- p1 = p;
- crule = p;
+ /* mark the rule's lhs as a nonterminal if not already so. */
- /* mark the rule's lhs as a nonterminal if not already so. */
+ if (lhs->class == unknown_sym)
+ {
+ lhs->class = nterm_sym;
+ lhs->value = nvars;
+ nvars++;
+ }
+ else if (lhs->class == token_sym)
+ complain (_("rule given for %s, which is a token"), lhs->tag);
- if (lhs->class == unknown_sym)
- {
- lhs->class = nterm_sym;
- lhs->value = nvars;
- nvars++;
- }
- else if (lhs->class == token_sym)
- complain (_("rule given for %s, which is a token"), lhs->tag);
-
- /* read the rhs of the rule. */
+ /* read the rhs of the rule. */
- for (;;)
- {
- t = lex ();
- if (t == tok_prec)
- {
- t = lex ();
- crule->ruleprec = symval;
- t = lex ();
- }
-
- if (!(t == tok_identifier || t == tok_left_curly))
- break;
-
- /* If next token is an identifier, see if a colon follows it.
- If one does, exit this rule now. */
- if (t == tok_identifier)
- {
- bucket *ssave;
- token_t t1;
-
- ssave = symval;
- t1 = lex ();
- unlex (t1);
- symval = ssave;
- if (t1 == tok_colon)
- break;
-
- if (!first_rhs) /* JF */
- first_rhs = symval;
- /* Not followed by colon =>
- process as part of this rule's rhs. */
- }
-
- /* If we just passed an action, that action was in the middle
- of a rule, so make a dummy rule to reduce it to a
- non-terminal. */
- if (action_flag)
- {
- bucket *sdummy;
-
- /* Since the action was written out with this rule's
- number, we must give the new rule this number by
- inserting the new rule before it. */
-
- /* Make a dummy nonterminal, a gensym. */
- sdummy = gensym ();
-
- /* Make a new rule, whose body is empty,
- before the current one, so that the action
- just read can belong to it. */
- nrules++;
- nitems++;
- record_rule_line ();
- p = XCALLOC (symbol_list, 1);
- if (crule1)
- crule1->next = p;
- else
- grammar = p;
- p->sym = sdummy;
- crule1 = XCALLOC (symbol_list, 1);
- p->next = crule1;
- crule1->next = crule;
-
- /* Insert the dummy generated by that rule into this
- rule. */
- nitems++;
- p = XCALLOC (symbol_list, 1);
- p->sym = sdummy;
- p1->next = p;
- p1 = p;
-
- action_flag = 0;
- }
-
- if (t == tok_identifier)
- {
- nitems++;
- p = XCALLOC (symbol_list, 1);
- p->sym = symval;
- p1->next = p;
- p1 = p;
- }
- else /* handle an action. */
- {
- copy_action (crule, rulelength);
- action_flag = 1;
- xactions++; /* JF */
- }
- rulelength++;
- } /* end of read rhs of rule */
-
- /* Put an empty link in the list to mark the end of this rule */
- p = XCALLOC (symbol_list, 1);
- p1->next = p;
- p1 = p;
+ for (;;)
+ {
+ t = lex ();
+ if (t == tok_prec)
+ {
+ t = lex ();
+ crule->ruleprec = symval;
+ t = lex ();
+ }
+
+ if (!(t == tok_identifier || t == tok_left_curly))
+ break;
- if (t == tok_prec)
- {
- complain (_("two @prec's in a row"));
- t = lex ();
- crule->ruleprec = symval;
- t = lex ();
- }
- if (t == tok_guard)
- {
- if (!semantic_parser)
- complain (_("%%guard present but %%semantic_parser not specified"));
+ /* If next token is an identifier, see if a colon follows it.
+ If one does, exit this rule now. */
+ if (t == tok_identifier)
+ {
+ bucket *ssave;
+ token_t t1;
+
+ ssave = symval;
+ t1 = lex ();
+ unlex (t1);
+ symval = ssave;
+ if (t1 == tok_colon)
+ break;
+
+ if (!first_rhs) /* JF */
+ first_rhs = symval;
+ /* Not followed by colon =>
+ process as part of this rule's rhs. */
+ }
+
+ /* If we just passed an action, that action was in the middle
+ of a rule, so make a dummy rule to reduce it to a
+ non-terminal. */
+ if (action_flag)
+ {
+ /* Since the action was written out with this rule's
+ number, we must give the new rule this number by
+ inserting the new rule before it. */
+
+ /* Make a dummy nonterminal, a gensym. */
+ bucket *sdummy = gensym ();
+
+ /* Make a new rule, whose body is empty, before the
+ current one, so that the action just read can
+ belong to it. */
+ nrules++;
+ nitems++;
+ p = symbol_list_new (sdummy);
+ /* Attach its lineno to that of the host rule. */
+ p->line = crule->line;
+ if (crule1)
+ crule1->next = p;
+ else
+ grammar = p;
+ /* End of the rule. */
+ crule1 = symbol_list_new (NULL);
+ crule1->next = crule;
+
+ p->next = crule1;
+
+ /* Insert the dummy generated by that rule into this
+ rule. */
+ nitems++;
+ p = symbol_list_new (sdummy);
+ p1->next = p;
+ p1 = p;
+
+ action_flag = 0;
+ }
+
+ if (t == tok_identifier)
+ {
+ nitems++;
+ p = symbol_list_new (symval);
+ p1->next = p;
+ p1 = p;
+ }
+ else /* handle an action. */
+ {
+ copy_action (crule, rulelength);
+ action_flag = 1;
+ xactions++; /* JF */
+ }
+ rulelength++;
+ } /* end of read rhs of rule */
+
+ /* Put an empty link in the list to mark the end of this rule */
+ p = symbol_list_new (NULL);
+ p1->next = p;
+ p1 = p;
+
+ if (t == tok_prec)
+ {
+ complain (_("two @prec's in a row"));
+ t = lex ();
+ crule->ruleprec = symval;
+ t = lex ();
+ }
+ if (t == tok_guard)
+ {
+ if (!semantic_parser)
+ complain (_("%%guard present but %%semantic_parser not specified"));
- copy_guard (crule, rulelength);
- t = lex ();
- }
- else if (t == tok_left_curly)
- {
- /* This case never occurs -wjh */
- if (action_flag)
- complain (_("two actions at end of one rule"));
- copy_action (crule, rulelength);
- action_flag = 1;
- xactions++; /* -wjh */
- t = lex ();
- }
- /* If $$ is being set in default way, report if any type
- mismatch. */
- else if (!xactions
- && first_rhs && lhs->type_name != first_rhs->type_name)
- {
- if (lhs->type_name == 0
- || first_rhs->type_name == 0
- || strcmp (lhs->type_name, first_rhs->type_name))
- complain (_("type clash (`%s' `%s') on default action"),
- lhs->type_name ? lhs->type_name : "",
- first_rhs->type_name ? first_rhs->type_name : "");
- }
- /* Warn if there is no default for $$ but we need one. */
- else if (!xactions && !first_rhs && lhs->type_name != 0)
- complain (_("empty rule for typed nonterminal, and no action"));
- if (t == tok_semicolon)
+ copy_guard (crule, rulelength);
t = lex ();
- }
-#if 0
- /* these things can appear as alternatives to rules. */
-/* NO, they cannot.
- a) none of the documentation allows them
- b) most of them scan forward until finding a next %
- thus they may swallow lots of intervening rules
-*/
- else if (t == tok_token)
- {
- parse_token_decl (token_sym, nterm_sym);
- t = lex ();
- }
- else if (t == tok_nterm)
- {
- parse_token_decl (nterm_sym, token_sym);
- t = lex ();
- }
- else if (t == tok_type)
- {
- t = get_type ();
- }
- else if (t == tok_union)
- {
- parse_union_decl ();
- t = lex ();
- }
- else if (t == tok_expect)
- {
- parse_expect_decl ();
- t = lex ();
- }
- else if (t == tok_start)
- {
- parse_start_decl ();
+ }
+ else if (t == tok_left_curly)
+ {
+ /* This case never occurs -wjh */
+ if (action_flag)
+ complain (_("two actions at end of one rule"));
+ copy_action (crule, rulelength);
+ action_flag = 1;
+ xactions++; /* -wjh */
+ t = lex ();
+ }
+ /* If $$ is being set in default way, report if any type
+ mismatch. */
+ else if (!xactions
+ && first_rhs && lhs->type_name != first_rhs->type_name)
+ {
+ if (lhs->type_name == 0
+ || first_rhs->type_name == 0
+ || strcmp (lhs->type_name, first_rhs->type_name))
+ complain (_("type clash (`%s' `%s') on default action"),
+ lhs->type_name ? lhs->type_name : "",
+ first_rhs->type_name ? first_rhs->type_name : "");
+ }
+ /* Warn if there is no default for $$ but we need one. */
+ else if (!xactions && !first_rhs && lhs->type_name != 0)
+ complain (_("empty rule for typed nonterminal, and no action"));
+ if (t == tok_semicolon)
t = lex ();
- }
-#endif
+ }
+ else
+ {
+ complain (_("invalid input: %s"), quote (token_buffer));
+ t = lex ();
+ }
- else
- {
- complain (_("invalid input: %s"), quote (token_buffer));
- t = lex ();
- }
- }
/* grammar has been read. Do some checking */
obstack_init (&el_obstack);
+ if (!no_lines_flag)
+ {
+ obstack_fgrow2 (&el_obstack, muscle_find ("linef"),
+ lineno, quotearg_style (c_quoting_style,
+ muscle_find("filename")));
+ }
+
while ((c = getc (finput)) != EOF)
obstack_1grow (&el_obstack, c);
}
\f
-/*--------------------------------------------------------------.
-| For named tokens, but not literal ones, define the name. The |
-| value is the user token number. |
-`--------------------------------------------------------------*/
-
-static void
-output_token_defines (struct obstack *oout)
-{
- bucket *bp;
- char *cp, *symbol;
- char c;
-
- for (bp = firstsymbol; bp; bp = bp->next)
- {
- symbol = bp->tag; /* get symbol */
-
- if (bp->value >= ntokens)
- continue;
- if (bp->user_token_number == SALIAS)
- continue;
- if ('\'' == *symbol)
- continue; /* skip literal character */
- if (bp == errtoken)
- continue; /* skip error token */
- if ('\"' == *symbol)
- {
- /* use literal string only if given a symbol with an alias */
- if (bp->alias)
- symbol = bp->alias->tag;
- else
- continue;
- }
-
- /* Don't #define nonliteral tokens whose names contain periods. */
- cp = symbol;
- while ((c = *cp++) && c != '.');
- if (c != '\0')
- continue;
-
- obstack_fgrow2 (oout, "# define\t%s\t%d\n",
- symbol, bp->user_token_number);
- if (semantic_parser)
- /* FIXME: This is certainly dead wrong, and should be just as
- above. --akim. */
- obstack_fgrow2 (oout, "# define\tT%s\t%d\n", symbol, bp->value);
- }
-}
-
-
/*------------------------------------------------------------------.
| Set TOKEN_TRANSLATIONS. Check that no two symbols share the same |
| number. |
}
-/*-----------------------------------.
-| Output definition of token names. |
-`-----------------------------------*/
+/*---------------------------------------------------------------.
+| Save the definition of token names in the `TOKENDEFS' muscle. |
+`---------------------------------------------------------------*/
static void
-symbols_output (void)
+symbols_save (void)
{
- {
- struct obstack tokendefs;
- obstack_init (&tokendefs);
- output_token_defines (&tokendefs);
- obstack_1grow (&tokendefs, 0);
- muscle_insert ("tokendef", xstrdup (obstack_finish (&tokendefs)));
- obstack_free (&tokendefs, NULL);
- }
-
-#if 0
- if (!no_parser_flag)
- output_token_defines (&table_obstack);
-#endif
-
- if (defines_flag)
+ struct obstack tokendefs;
+ bucket *bp;
+ char *cp, *symbol;
+ char c;
+ obstack_init (&tokendefs);
+
+ for (bp = firstsymbol; bp; bp = bp->next)
{
- output_token_defines (&defines_obstack);
+ symbol = bp->tag; /* get symbol */
- if (!pure_parser)
+ if (bp->value >= ntokens)
+ continue;
+ if (bp->user_token_number == SALIAS)
+ continue;
+ if ('\'' == *symbol)
+ continue; /* skip literal character */
+ if (bp == errtoken)
+ continue; /* skip error token */
+ if ('\"' == *symbol)
{
- if (spec_name_prefix)
- obstack_fgrow1 (&defines_obstack, "\nextern YYSTYPE %slval;\n",
- spec_name_prefix);
+ /* use literal string only if given a symbol with an alias */
+ if (bp->alias)
+ symbol = bp->alias->tag;
else
- obstack_sgrow (&defines_obstack,
- "\nextern YYSTYPE yylval;\n");
+ continue;
}
- if (semantic_parser)
- {
- int i;
+ /* Don't #define nonliteral tokens whose names contain periods. */
+ cp = symbol;
+ while ((c = *cp++) && c != '.');
+ if (c != '\0')
+ continue;
- 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;
-#endif
- }
+ obstack_fgrow2 (&tokendefs, "# define %s\t%d\n",
+ symbol, bp->user_token_number);
+ if (semantic_parser)
+ /* FIXME: This is probably wrong, and should be just as
+ above. --akim. */
+ obstack_fgrow2 (&tokendefs, "# define T%s\t%d\n", symbol, bp->value);
}
+
+ obstack_1grow (&tokendefs, 0);
+ muscle_insert ("tokendef", xstrdup (obstack_finish (&tokendefs)));
+ obstack_free (&tokendefs, NULL);
}
int ruleno;
symbol_list *p;
- 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;
- ruleprec = p->ruleprec;
+ bucket *ruleprec = p->ruleprec;
+ rule_table[ruleno].lhs = p->sym->value;
+ rule_table[ruleno].rhs = itemno;
+ rule_table[ruleno].line = p->line;
+ rule_table[ruleno].useful = TRUE;
+ rule_table[ruleno].action = p->action;
+ rule_table[ruleno].action_line = p->action_line;
p = p->next;
while (p && p->sym)
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;
}
ritem[itemno] = 0;
+
+ if (trace_flag)
+ ritem_print (stderr);
}
\f
/*-------------------------------------------------------------------.
nvars = 0;
nrules = 0;
nitems = 0;
- rline_allocated = 10;
- rline = XCALLOC (short, rline_allocated);
typed = 0;
lastprec = 0;
undeftoken->class = token_sym;
undeftoken->user_token_number = 2;
+ /* Initialize the obstacks. */
+ obstack_init (&action_obstack);
+ obstack_init (&attrs_obstack);
+ obstack_init (&guard_obstack);
+ obstack_init (&output_obstack);
+
+ finput = xfopen (infile, "r");
+
/* Read the declaration section. Copy %{ ... %} groups to
TABLE_OBSTACK and FDEFINES file. Also notice any %token, %left,
etc. found there. */
/* Some C code is given at the end of the grammar file. */
read_additionnal_code ();
- /* Now we know whether we need the line-number stack. If we do,
- write its type into the .tab.h file.
- This is no longer need with header skeleton. */
+ lex_free ();
+ xfclose (finput);
/* Assign the symbols their symbol numbers. Write #defines for the
token symbols into FDEFINES if requested. */
packsymbols ();
- symbols_output ();
+ /* Save them. */
+ symbols_save ();
+
/* Convert the grammar into the format described in gram.h. */
packgram ();
- /* Output the headers. */
- symbols_output ();
}
projects / bison.git / blobdiff