/* Allocate input grammar variables for Bison.
Copyright (C) 1984, 1986, 1989, 2001, 2002, 2003, 2005, 2006
- 2007 Free Software Foundation, Inc.
+ 2007, 2008 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
int max_user_token_number = 256;
-/*--------------------------------------------------------------.
-| Return true IFF the rule has a `number' smaller than NRULES. |
-`--------------------------------------------------------------*/
-
bool
-rule_useful_p (rule *r)
+rule_useful_in_grammar_p (rule *r)
{
return r->number < nrules;
}
-
-/*-------------------------------------------------------------.
-| Return true IFF the rule has a `number' higher than NRULES. |
-`-------------------------------------------------------------*/
-
bool
-rule_useless_p (rule *r)
+rule_useless_in_grammar_p (rule *r)
{
- return !rule_useful_p (r);
+ return !rule_useful_in_grammar_p (r);
}
-
-/*--------------------------------------------------------------------.
-| Return true IFF the rule is not flagged as useful *and* is useful. |
-| In other words, it was discarded because of conflicts. |
-`--------------------------------------------------------------------*/
-
bool
-rule_never_reduced_p (rule *r)
+rule_useless_in_parser_p (rule *r)
{
- return !r->useful && rule_useful_p (r);
+ return !r->useful && rule_useful_in_grammar_p (r);
}
-
-/*----------------------------------------------------------------.
-| Print this RULE's number and lhs on OUT. If a PREVIOUS_LHS was |
-| already displayed (by a previous call for another rule), avoid |
-| useless repetitions. |
-`----------------------------------------------------------------*/
-
void
rule_lhs_print (rule *r, symbol *previous_lhs, FILE *out)
{
xml_printf (out, level, "<lhs>%s</lhs>", r->lhs->tag);
}
-
-/*--------------------------------------.
-| Return the number of symbols in RHS. |
-`--------------------------------------*/
-
-int
+size_t
rule_rhs_length (rule *r)
{
- int res = 0;
+ size_t res = 0;
item_number *rhsp;
for (rhsp = r->rhs; *rhsp >= 0; ++rhsp)
++res;
return res;
}
-
-/*-------------------------------.
-| Print this rule's RHS on OUT. |
-`-------------------------------*/
-
void
rule_rhs_print (rule *r, FILE *out)
{
item_number *rp;
xml_puts (out, level, "<rhs>");
for (rp = r->rhs; *rp >= 0; rp++)
- xml_printf (out, level + 1, "<symbol class=\"%s\">%s</symbol>",
- symbol_class_get_string (symbols[*rp]),
+ xml_printf (out, level + 1, "<symbol>%s</symbol>",
xml_escape (symbols[*rp]->tag));
xml_puts (out, level, "</rhs>");
}
}
}
-/*-------------------------.
-| Print this rule on OUT. |
-`-------------------------*/
-
void
rule_print (rule *r, FILE *out)
{
rule_rhs_print (r, out);
}
-
-/*------------------------.
-| Dump RITEM for traces. |
-`------------------------*/
-
void
ritem_print (FILE *out)
{
fputs ("\n\n", out);
}
-
-/*------------------------------------------.
-| Return the size of the longest rule RHS. |
-`------------------------------------------*/
-
size_t
ritem_longest_rhs (void)
{
return max;
}
-
-/*-----------------------------------------------------------------.
-| Print the grammar's rules that match FILTER on OUT under TITLE. |
-`-----------------------------------------------------------------*/
-
void
grammar_rules_partial_print (FILE *out, const char *title,
rule_filter filter)
fputs ("\n\n", out);
}
-
-/*----------------------------------------------------------.
-| Print the grammar's rules that match FILTER on OUT (XML). |
-`-----------------------------------------------------------*/
+void
+grammar_rules_print (FILE *out)
+{
+ grammar_rules_partial_print (out, _("Grammar"), rule_useful_in_grammar_p);
+}
void
-grammar_rules_partial_print_xml (FILE *out, int level, bool rtag,
- rule_filter filter)
+grammar_rules_print_xml (FILE *out, int level)
{
rule_number r;
bool first = true;
for (r = 0; r < nrules + nuseless_productions; r++)
{
- if (filter && !filter (&rules[r]))
- continue;
- if (rtag && first)
+ if (first)
xml_puts (out, level + 1, "<rules>");
first = false;
-
- xml_printf (out, level + 2, "<rule number=\"%d\">",
- rules[r].number);
+ {
+ char const *usefulness;
+ if (rule_useless_in_grammar_p (&rules[r]))
+ usefulness = "useless-in-grammar";
+ else if (rule_useless_in_parser_p (&rules[r]))
+ usefulness = "useless-in-parser";
+ else
+ usefulness = "useful";
+ xml_indent (out, level + 2);
+ fprintf (out, "<rule number=\"%d\" usefulness=\"%s\"",
+ rules[r].number, usefulness);
+ if (rules[r].precsym)
+ fprintf (out, " percent_prec=\"%s\"", rules[r].precsym->tag);
+ fputs (">\n", out);
+ }
rule_lhs_print_xml (&rules[r], out, level + 3);
rule_rhs_print_xml (&rules[r], out, level + 3);
xml_puts (out, level + 2, "</rule>");
}
- if (rtag)
- {
- if (!first)
- xml_puts (out, level + 1, "</rules>");
- else
- xml_puts (out, level + 1, "<rules/>");
- }
-}
-
-/*------------------------------------------.
-| Print the grammar's useful rules on OUT. |
-`------------------------------------------*/
-
-void
-grammar_rules_print (FILE *out)
-{
- grammar_rules_partial_print (out, _("Grammar"), rule_useful_p);
-}
-
-void
-grammar_rules_print_xml (FILE *out, int level)
-{
- grammar_rules_partial_print_xml (out, level, true, rule_useful_p);
+ if (!first)
+ xml_puts (out, level + 1, "</rules>");
+ else
+ xml_puts (out, level + 1, "<rules/>");
}
-
-/*-------------------.
-| Dump the grammar. |
-`-------------------*/
-
void
grammar_dump (FILE *out, const char *title)
{
fprintf (out, "\n\n");
}
-
-/*------------------------------------------------------------------.
-| Report on STDERR the rules that are not flagged USEFUL, using the |
-| MESSAGE (which can be `useless rule' when invoked after grammar |
-| reduction, or `never reduced' after conflicts were taken into |
-| account). |
-`------------------------------------------------------------------*/
-
void
-grammar_rules_never_reduced_report (const char *message)
+grammar_rules_useless_report (const char *message)
{
rule_number r;
for (r = 0; r < nrules ; ++r)
projects / bison.git / blobdiff