X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/9280d3ef893b90b36c89fa7737512f2d640e41d9..e62f1a899168bdf1658dd6d934dea407491a80ff:/src/symtab.h diff --git a/src/symtab.h b/src/symtab.h index 54ff80fa..6433efcd 100644 --- 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. @@ -22,22 +23,14 @@ #ifndef SYMTAB_H_ # define SYMTAB_H_ +# include "assoc.h" # include "location.h" +# include "uniqstr.h" /*----------. | Symbols. | `----------*/ -/* Associativity values for tokens and rules. */ -typedef enum -{ - undef_assoc, - right_assoc, - left_assoc, - non_assoc -} associativity; - - /* Symbol classes. */ typedef enum { @@ -48,31 +41,41 @@ typedef enum /* Internal token numbers. */ -typedef short symbol_number_t; +typedef int symbol_number; +#define SYMBOL_NUMBER_MAXIMUM INT_MAX + +typedef struct symbol symbol; -typedef struct symbol_s symbol_t; -struct symbol_s +/* When extending this structure, be sure to complete + symbol_check_alias_consistency. */ +struct symbol { /* The key, name of the symbol. */ - char *tag; + uniqstr tag; + /* The location of its first occurrence. */ + location location; + + /* Its %type and associated printer and destructor. */ + uniqstr type_name; + location type_location; - /* Its %type and associated destructor. */ - char *type_name; char *destructor; + location destructor_location; - /* The location of its first occurence. */ - location_t location; + char *printer; + location printer_location; - symbol_number_t number; - short prec; - associativity assoc; + 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. */ - symbol_t *alias; + symbol *alias; symbol_class class; }; @@ -86,56 +89,49 @@ struct symbol_s #define USER_NUMBER_ALIAS -9991 /* Undefined internal token number. */ -#define NUMBER_UNDEFINED ((symbol_number_t) -1) +#define NUMBER_UNDEFINED (-1) -/* Return the tag of this SYMBOL in a printable form. Warning: uses - the QUOTEARG slot 0. */ -const char *symbol_tag_get PARAMS ((symbol_t *symbol)); - -/* Return the tag of this SYMBOL in a printable form. Use the - QUOTEARG slot number N. */ -const char *symbol_tag_get_n PARAMS ((symbol_t *symbol, int n)); - -/* Print the tag of this SYMBOL. */ -void symbol_tag_print PARAMS ((symbol_t *symbol, FILE *out)); - /* Fetch (or create) the symbol associated to KEY. */ -symbol_t *getsym PARAMS ((const char *key, location_t location)); +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. Make it an alias of SYMVAL. */ -void symbol_make_alias PARAMS ((symbol_t *symbol, symbol_t *symval)); +/* 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 to SYMBOL. Does nothing if passed 0 as +/* Set the TYPE_NAME associated with SYM. Do nothing if passed 0 as TYPE_NAME. */ -void symbol_type_set PARAMS ((symbol_t *symbol, location_t location, - char *type_name)); +void symbol_type_set (symbol *sym, uniqstr type_name, location loc); -/* Set the DESTRUCTOR associated to SYMBOL. */ -void symbol_destructor_set PARAMS ((symbol_t *symbol, location_t location, - char *destructor)); +/* Set the DESTRUCTOR associated with SYM. */ +void symbol_destructor_set (symbol *sym, char *destructor, location loc); -/* Set the PRECEDENCE associated to SYMBOL. Ensures that SYMBOL is a - terminal. Does nothing if invoked with UNDEF_ASSOC as ASSOC. */ -void symbol_precedence_set PARAMS ((symbol_t *symbol, location_t location, - int prec, associativity assoc)); +/* Set the PRINTER associated with SYM. */ +void symbol_printer_set (symbol *sym, char *printer, location loc); -/* Set the CLASS associated to SYMBOL. */ -void symbol_class_set PARAMS ((symbol_t *symbol, symbol_class class)); +/* 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 USER_TOKEN_NUMBER associated to SYMBOL. */ -void symbol_user_token_number_set PARAMS ((symbol_t *symbol, int user_number)); +/* 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_t *errtoken; -extern symbol_t *undeftoken; -extern symbol_t *eoftoken; -extern symbol_t *axiom; -extern symbol_t *startsymbol; -extern location_t startsymbol_location; +extern symbol *errtoken; +extern symbol *undeftoken; +extern symbol *endtoken; +extern symbol *accept; +extern symbol *startsymbol; +extern location startsymbol_location; /*---------------. @@ -144,24 +140,17 @@ extern location_t startsymbol_location; /* Create the symbol table. */ -void symbols_new PARAMS ((void)); - -/* A function to apply to each symbol. */ -typedef bool (*symbol_processor) PARAMS ((symbol_t *)); - -/* Apply PROCESSOR to all the symbols. PROCESSOR must return TRUE: on - FALSE, the processing stops. */ -void symbols_do PARAMS ((symbol_processor processor, void *processor_data)); +void symbols_new (void); /* Free all the memory allocated for symbols. */ -void symbols_free PARAMS ((void)); +void symbols_free (void); /* Check that all the symbols are defined. Report any undefined symbols and consider them nonterminals. */ -void symbols_check_defined PARAMS ((void)); +void symbols_check_defined (void); /* Perform various sanity checks, assign symbol numbers, and set up TOKEN_TRANSLATIONS. */ -void symbols_pack PARAMS ((void)); +void symbols_pack (void); #endif /* !SYMTAB_H_ */