skeletons: simplify the handling of default api.location.type

[bison.git] / src / scan-code.h

diff --git a/src/scan-code.h b/src/scan-code.h
index a6e1fc130ac0f5209e9327b7af0bf83783ca798d..348d9e3f820e9e865644993cd00e74cd42d8f607 100644 (file)
--- a/src/scan-code.h
+++ b/src/scan-code.h
@@ -1,12 +1,12 @@
 /* Bison code properties structure and scanner.
 
-   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2006-2007, 2009-2012 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
+   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 2 of the License, or
+   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,
@@ -15,15 +15,13 @@
    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, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301  USA
-*/
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef SCAN_CODE_H_
 # define SCAN_CODE_H_
 
 # include "location.h"
+# include "named-ref.h"
 
 struct symbol_list;
 
@@ -47,7 +45,10 @@ typedef struct code_props {
     CODE_PROPS_SYMBOL_ACTION, CODE_PROPS_RULE_ACTION
   } kind;
 
-  /** \c NULL iff \c code_props::kind is \c CODE_PROPS_NONE.  */
+  /**
+   * \c NULL iff \c code_props::kind is \c CODE_PROPS_NONE.
+   * Memory is allocated in an obstack freed elsewhere.
+   */
   char const *code;
   /** Undefined iff \c code_props::code is \c NULL.  */
   location location;
@@ -65,8 +66,22 @@ typedef struct code_props {
    */
   bool is_value_used;
 
+  /**
+   * \c true iff this code is an action that is not to be deferred in
+   * a non-deterministic parser.
+   */
+  bool is_predicate;
+
+  /**
+   * Whether this is actually used (i.e., not completely masked by
+   * other code props).  */
+  bool is_used;
+
   /** \c NULL iff \c code_props::kind is not \c CODE_PROPS_RULE_ACTION.  */
   struct symbol_list *rule;
+
+  /* Named reference. */
+  named_ref *named_ref;
 } code_props;
 
 /**
@@ -78,11 +93,20 @@ typedef struct code_props {
 void code_props_none_init (code_props *self);
 
 /** Equivalent to \c code_props_none_init.  */
-#define CODE_PROPS_NONE_INIT \
-  {CODE_PROPS_NONE, NULL, EMPTY_LOCATION_INIT, false, NULL}
+#define CODE_PROPS_NONE_INIT                    \
+  {                                             \
+    /* .kind = */ CODE_PROPS_NONE,              \
+    /* .code = */ NULL,                         \
+    /* .location = */ EMPTY_LOCATION_INIT,      \
+    /* .is_value_used = */ false,               \
+    /* .is_predicate = */ false,                \
+    /* .is_used = */ false,                     \
+    /* .rule = */ NULL,                         \
+    /* .named_ref = */ NULL                     \
+  }
 
 /** Initialized by \c CODE_PROPS_NONE_INIT with no further modification.  */
-extern code_props const code_props_none;
+extern code_props code_props_none;
 
 /**
  * \pre
@@ -132,7 +156,8 @@ void code_props_symbol_action_init (code_props *self, char const *code,
  *     - The caller frees \c rule.
  */
 void code_props_rule_action_init (code_props *self, char const *code,
-                                  location code_loc, struct symbol_list *rule);
+                                  location code_loc, struct symbol_list *rule,
+                                  named_ref *name, bool is_predicate);
 
 /**
  * \pre
@@ -162,22 +187,10 @@ void code_scanner_last_string_free (void);
  * \pre
  *   - None.
  * \post
- *   - All dynamic memory allocated during any previous invocations of
- *     \c code_props_translate_code, \c translate_rule_action,
- *     \c translate_symbol_action, and \c translate_code has been freed.  All
- *     \c code_props instances may now be invalid.
+ *   - All dynamic memory allocated during invocations of
+ *     \c code_props_translate_code (if any) has been freed.  All \c code_props
+ *     instances may now be invalid.
  */
 void code_scanner_free (void);
 
-/* The action of the rule R contains $$, $1 etc. referring to the values
-   of the rule R. */
-char const *translate_rule_action (symbol_list *r);
-
-/* The action A refers to $$ and @$ only, referring to a symbol. */
-char const *translate_symbol_action (char const *a, location l);
-
-/* The action contains no special escapes, just protect M4 special
-   symbols.  */
-char const *translate_code (char const *a, location l);
-
 #endif /* !SCAN_CODE_H_ */