Change @dircategory from "GNU programming tools" to "Software development".

[bison.git] / src / symtab.h

diff --git a/src/symtab.h b/src/symtab.h
index f56bc3b119f0c0721d086c5095da98d66da82d37..6433efcd527a7058df7910e5e1b18cd0c1018b69 100644 (file)
--- a/src/symtab.h
+++ b/src/symtab.h
@@ -1,5 +1,6 @@
-/* Definitions for symtab.c and callers, part of bison,
-   Copyright (C) 1984, 1989, 1992, 2000, 2001, 2002
+/* Definitions for symtab.c and callers, part of Bison.
+
+   Copyright (C) 1984, 1989, 1992, 2000, 2001, 2002, 2004

    Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
    Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.


@@ -22,16 +23,13 @@
 #ifndef SYMTAB_H_
 # define SYMTAB_H_
 
 #ifndef SYMTAB_H_
 # define SYMTAB_H_
 

-#define        TABSIZE 1009
-
-/* Associativity values for tokens and rules.  */
-typedef enum
-{
-  right_assoc,
-  left_assoc,
-  non_assoc
-} associativity;
+# include "assoc.h"
+# include "location.h"
+# include "uniqstr.h"

 
 

+/*----------.
+| Symbols.  |
+`----------*/

 
 /* Symbol classes.  */
 typedef enum
 
 /* Symbol classes.  */
 typedef enum


@@ -41,36 +39,118 @@ typedef enum
   nterm_sym            /* non-terminal */
 } symbol_class;
 
   nterm_sym            /* non-terminal */
 } symbol_class;
 

-#define SUNDEF  -1              /* For undefined user number. */
-#define SALIAS -9991           /* for symbol generated with an alias */

 
 

-struct symbol_s
+/* Internal token numbers. */
+typedef int symbol_number;
+#define SYMBOL_NUMBER_MAXIMUM INT_MAX
+
+
+typedef struct symbol symbol;
+
+/* When extending this structure, be sure to complete
+   symbol_check_alias_consistency.  */
+struct symbol

 {
 {

-  /* The key, name of the symbol. */
-  char *tag;
-  /* Its type. */
-  char *type_name;
-  short number;
-  short prec;
-  associativity assoc;
-  short user_token_number;
-
-  /* Points to the other in the identifier-symbol pair for an
-     alias. Special value SALIAS in the identifier half of the
+  /* The key, name of the symbol.  */
+  uniqstr tag;
+  /* The location of its first occurrence.  */
+  location location;
+
+  /* Its %type and associated printer and destructor.  */
+  uniqstr type_name;
+  location type_location;
+
+  char *destructor;
+  location destructor_location;
+
+  char *printer;
+  location printer_location;
+
+  symbol_number number;
+  location prec_location;
+  int prec;
+  assoc assoc;
+  int user_token_number;
+
+  /* Points to the other in the identifier-symbol pair for an alias.
+     Special value USER_NUMBER_ALIAS in the identifier half of the

      identifier-symbol pair for an alias.  */
      identifier-symbol pair for an alias.  */

-  struct symbol_s *alias;
+  symbol *alias;

   symbol_class class;
 };
 
   symbol_class class;
 };
 

-typedef struct symbol_s symbol_t;
+/* Undefined user number.  */
+#define USER_NUMBER_UNDEFINED -1
+
+/* `symbol->user_token_number == USER_NUMBER_ALIAS' means this symbol
+   *has* (not is) a string literal alias.  For instance, `%token foo
+   "foo"' has `"foo"' numbered regularly, and `foo' numbered as
+   USER_NUMBER_ALIAS.  */
+#define USER_NUMBER_ALIAS -9991
+
+/* Undefined internal token number.  */
+#define NUMBER_UNDEFINED (-1)
+
+
+/* Fetch (or create) the symbol associated to KEY.  */
+symbol *symbol_get (const char *key, location loc);
+
+/* Generate a dummy nonterminal, whose name cannot conflict with the
+   user's names.  */
+symbol *dummy_symbol_get (location loc);
+
+/* Declare the new symbol SYM.  Make it an alias of SYMVAL.  */
+void symbol_make_alias (symbol *sym, symbol *symval, location loc);
+
+/* Set the TYPE_NAME associated with SYM.  Do nothing if passed 0 as
+   TYPE_NAME.  */
+void symbol_type_set (symbol *sym, uniqstr type_name, location loc);
+
+/* Set the DESTRUCTOR associated with SYM.  */
+void symbol_destructor_set (symbol *sym, char *destructor, location loc);
+
+/* Set the PRINTER associated with SYM.  */
+void symbol_printer_set (symbol *sym, char *printer, location loc);
+
+/* Set the PRECEDENCE associated with SYM.  Ensure that SYMBOL is a
+   terminal.  Do nothing if invoked with UNDEF_ASSOC as ASSOC.  */
+void symbol_precedence_set (symbol *sym, int prec, assoc a, location loc);
+
+/* Set the CLASS associated with SYM.  */
+void symbol_class_set (symbol *sym, symbol_class class, location loc);
+
+/* Set the USER_TOKEN_NUMBER associated with SYM.  */
+void symbol_user_token_number_set (symbol *sym, int user_number, location loc);
+
+
+/* Distinguished symbols.  AXIOM is the real start symbol, that used
+   by the automaton.  STARTSYMBOL is the one specified by the user.
+   */
+extern symbol *errtoken;
+extern symbol *undeftoken;
+extern symbol *endtoken;
+extern symbol *accept;
+extern symbol *startsymbol;
+extern location startsymbol_location;
+
+
+/*---------------.
+| Symbol table.  |
+`---------------*/
+
+
+/* Create the symbol table.  */
+void symbols_new (void);

 
 

-/* A function to apply to each symbol. */
-typedef bool (*symbol_processor) PARAMS ((symbol_t *));
+/* Free all the memory allocated for symbols.  */
+void symbols_free (void);

 
 

-symbol_t *getsym PARAMS ((const char *));
+/* Check that all the symbols are defined.  Report any undefined
+   symbols and consider them nonterminals.  */
+void symbols_check_defined (void);

 
 

-void symbols_new PARAMS ((void));
-void symbols_do PARAMS ((symbol_processor processor, void *processor_data));
-void symbols_free PARAMS ((void));
+/* Perform various sanity checks, assign symbol numbers, and set up
+   TOKEN_TRANSLATIONS.  */
+void symbols_pack (void);

 
 #endif /* !SYMTAB_H_ */
 
 #endif /* !SYMTAB_H_ */