%option prefix="code_" outfile="lex.yy.c"
%{
-#include <config.h>
-#include "system.h"
-
/* Work around a bug in flex 2.5.31. See Debian bug 333231
<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>. */
#undef code_wrap
#define code_wrap() 1
#define FLEX_PREFIX(Id) code_ ## Id
-#include "complain.h"
#include "flex-scanner.h"
+
+#include "complain.h"
#include "reader.h"
#include "getargs.h"
-#include <assert.h>
#include <get-errno.h>
#include <quote.h>
/* The current calling start condition: SC_RULE_ACTION or
SC_SYMBOL_ACTION. */
-# define YY_DECL const char *code_lex (int sc_context, symbol_list *rule)
+# define YY_DECL char *code_lex (int sc_context, symbol_list *rule)
YY_DECL;
#define YY_USER_ACTION location_compute (loc, &loc->end, yytext, yyleng);
static void handle_action_at (symbol_list *rule, char *cp, location at_loc);
static location the_location;
static location *loc = &the_location;
+
+/* True if an untyped $$ or $n was seen. */
+static bool untyped_var_seen;
%}
/* C and C++ comments in code. */
%x SC_COMMENT SC_LINE_COMMENT
%{
/* Nesting level of the current code in braces. */
- int braces_level IF_LINT (= 0);
+ int braces_level = 0;
/* This scanner is special: it is invoked only once, henceforth
is expected to return only once. This initialization is
therefore done once per action to translate. */
- assert (sc_context == SC_SYMBOL_ACTION
- || sc_context == SC_RULE_ACTION
- || sc_context == INITIAL);
+ aver (sc_context == SC_SYMBOL_ACTION
+ || sc_context == SC_RULE_ACTION
+ || sc_context == INITIAL);
BEGIN sc_context;
%}
++cp;
*cp = '\0';
++cp;
+ if (untyped_var_seen)
+ complain_at (dollar_loc, _("explicit type given in untyped grammar"));
+ tag_seen = true;
}
if (*cp == '$')
{
if (!type_name)
type_name = symbol_list_n_type_name_get (rule, dollar_loc, 0);
- if (!type_name && typed)
- {
- if (rule->midrule_parent_rule)
- complain_at (dollar_loc,
- _("$$ for the midrule at $%d of `%s' has no declared"
- " type"),
- rule->midrule_parent_rhs_index,
- effective_rule->sym->tag);
- else
- complain_at (dollar_loc, _("$$ of `%s' has no declared type"),
- rule->sym->tag);
- }
+
if (!type_name)
- type_name = "";
+ {
+ if (union_seen | tag_seen)
+ {
+ if (rule->midrule_parent_rule)
+ complain_at (dollar_loc,
+ _("$$ for the midrule at $%d of `%s'"
+ " has no declared type"),
+ rule->midrule_parent_rhs_index,
+ effective_rule->content.sym->tag);
+ else
+ complain_at (dollar_loc, _("$$ of `%s' has no declared type"),
+ rule->content.sym->tag);
+ }
+ else
+ untyped_var_seen = true;
+ type_name = "";
+ }
+
obstack_fgrow1 (&obstack_for_string,
"]b4_lhs_value([%s])[", type_name);
rule->used = true;
}
else
{
- long int num;
- set_errno (0);
- num = strtol (cp, 0, 10);
- if (INT_MIN <= num && num <= effective_rule_length && ! get_errno ())
+ long int num = strtol (cp, NULL, 10);
+
+ if (1 - INT_MAX + effective_rule_length <= num
+ && num <= effective_rule_length)
{
int n = num;
- if (1-n > max_left_semantic_context)
- max_left_semantic_context = 1-n;
- if (!type_name && n > 0)
+ if (max_left_semantic_context < 1 - n)
+ max_left_semantic_context = 1 - n;
+ if (!type_name && 0 < n)
type_name =
symbol_list_n_type_name_get (effective_rule, dollar_loc, n);
- if (!type_name && typed)
- complain_at (dollar_loc, _("$%d of `%s' has no declared type"),
- n, effective_rule->sym->tag);
if (!type_name)
- type_name = "";
+ {
+ if (union_seen | tag_seen)
+ complain_at (dollar_loc, _("$%d of `%s' has no declared type"),
+ n, effective_rule->content.sym->tag);
+ else
+ untyped_var_seen = true;
+ type_name = "";
+ }
+
obstack_fgrow3 (&obstack_for_string,
"]b4_rhs_value(%d, %d, [%s])[",
effective_rule_length, n, type_name);
handle_action_at (symbol_list *rule, char *text, location at_loc)
{
char *cp = text + 1;
- locations_flag = true;
- int effective_rule_length;
+ int effective_rule_length =
+ (rule->midrule_parent_rule
+ ? rule->midrule_parent_rhs_index - 1
+ : symbol_list_length (rule->next));
- if (rule->midrule_parent_rule)
- effective_rule_length = rule->midrule_parent_rhs_index - 1;
- else
- effective_rule_length = symbol_list_length (rule->next);
+ locations_flag = true;
if (*cp == '$')
obstack_sgrow (&obstack_for_string, "]b4_lhs_location[");
else
{
- long int num;
- set_errno (0);
- num = strtol (cp, 0, 10);
+ long int num = strtol (cp, NULL, 10);
- if (INT_MIN <= num && num <= effective_rule_length && ! get_errno ())
+ if (1 - INT_MAX + effective_rule_length <= num
+ && num <= effective_rule_length)
{
int n = num;
obstack_fgrow2 (&obstack_for_string, "]b4_rhs_location(%d, %d)[",
| Initialize the scanner. |
`-------------------------*/
-/* Translate the dollars and ats in \a a, whose location is l.
- Depending on the \a sc_context (SC_RULE_ACTION, SC_SYMBOL_ACTION,
- INITIAL), the processing is different. */
+/* Translate the dollars and ats in \a a, whose location is \a l. The
+ translation is for \a rule, in the context \a sc_context
+ (SC_RULE_ACTION, SC_SYMBOL_ACTION, INITIAL). */
-static const char *
-translate_action (int sc_context, symbol_list *rule, const char *a, location l)
+static char const *
+translate_action (int sc_context, symbol_list *rule, char const *a, location l)
{
- const char *res;
+ char *res;
static bool initialized = false;
if (!initialized)
{
obstack_init (&obstack_for_string);
- /* The initial buffer, never used. */
- yy_delete_buffer (YY_CURRENT_BUFFER);
yy_flex_debug = 0;
initialized = true;
}
return res;
}
-const char *
+char const *
translate_rule_action (symbol_list *rule)
{
return translate_action (SC_RULE_ACTION, rule, rule->action,
rule->action_location);
}
-const char *
-translate_symbol_action (const char *a, location l)
+char const *
+translate_symbol_action (char const *a, location l)
{
return translate_action (SC_SYMBOL_ACTION, NULL, a, l);
}
-const char *
-translate_code (const char *a, location l)
+char const *
+translate_code (char const *a, location l)
{
return translate_action (INITIAL, NULL, a, l);
}
{
obstack_free (&obstack_for_string, 0);
/* Reclaim Flex's buffers. */
- yy_delete_buffer (YY_CURRENT_BUFFER);
+ yylex_destroy ();
}
projects / bison.git / blobdiff