X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/4d7370cb4fe960032afd4a42293b6d55e02237fe..6130b75585cad5f4bb2ee78875a0bfe109b2a3e3:/src/symtab.h diff --git a/src/symtab.h b/src/symtab.h index 647a9e4c..0e521626 100644 --- a/src/symtab.h +++ b/src/symtab.h @@ -1,24 +1,22 @@ /* Definitions for symtab.c and callers, part of Bison. - Copyright (C) 1984, 1989, 1992, 2000, 2001, 2002, 2004, 2005, 2006 + Copyright (C) 1984, 1989, 1992, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. - Bison 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, or (at your option) - any later version. + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. - Bison is distributed in the hope that it will be useful, + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with Bison; see the file COPYING. 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 . */ /** * \file symtab.h @@ -30,6 +28,7 @@ # include "assoc.h" # include "location.h" +# include "scan-code.h" # include "uniqstr.h" /*----------. @@ -69,28 +68,16 @@ struct symbol /** Any \c \%destructor declared specifically for this symbol. Access this field only through symbol's interface functions. For - example, if symbol::destructor = NULL, the default - \c \%destructor or a per-type \c \%destructor might be appropriate, and + example, if symbol::destructor = NULL, a default \c \%destructor + or a per-type \c \%destructor might be appropriate, and \c symbol_destructor_get will compute the correct one. */ - const char *destructor; - - /** The location of \c symbol::destructor. - - Access this field only through symbol's interface functions. - \sa symbol::destructor */ - location destructor_location; + code_props destructor; /** Any \c \%printer declared specifically for this symbol. Access this field only through symbol's interface functions. \sa symbol::destructor */ - const char *printer; - - /** The location of \c symbol::printer. - - Access this field only through symbol's interface functions. - \sa symbol::destructor */ - location printer_location; + code_props printer; symbol_number number; location prec_location; @@ -106,7 +93,6 @@ struct symbol bool declared; }; - /** Undefined user number. */ #define USER_NUMBER_UNDEFINED -1 @@ -119,9 +105,6 @@ struct symbol /* Undefined internal token number. */ #define NUMBER_UNDEFINED (-1) -/** Print a symbol (for debugging). */ -void symbol_print (symbol *s, FILE *f); - /** Fetch (or create) the symbol associated to KEY. */ symbol *symbol_from_uniqstr (const uniqstr key, location loc); @@ -133,9 +116,23 @@ symbol *symbol_get (const char *key, location loc); Its name cannot conflict with the user's names. */ symbol *dummy_symbol_get (location loc); + +/*--------------------. +| Methods on symbol. | +`--------------------*/ + +/** Print a symbol (for debugging). */ +void symbol_print (symbol *s, FILE *f); + /** Is this a dummy nonterminal? */ bool symbol_is_dummy (const symbol *sym); +/** Return the name of the symbol that can be used as an identifier. + ** Consider the alias if needed. + ** Return 0 if there is none (e.g., the symbol is only defined as + ** a string). */ +uniqstr symbol_id_get (symbol const *sym); + /** Declare the new symbol \c sym. Make it an alias of \c symval. */ void symbol_make_alias (symbol *sym, symbol *symval, location loc); @@ -144,27 +141,22 @@ void symbol_make_alias (symbol *sym, symbol *symval, location loc); Do nothing if passed 0 as \c type_name. */ void symbol_type_set (symbol *sym, uniqstr type_name, location loc); -/** Set the \c destructor associated with \c sym. */ -void symbol_destructor_set (symbol *sym, const char *destructor, location loc); +/** Get the \c class string associated with \c sym. */ +const char *symbol_class_get_string (symbol *sym); -/** Get the computed \c \%destructor for \c sym, or \c NULL if none. */ -const char *symbol_destructor_get (symbol *sym); +/** Set the \c destructor associated with \c sym. */ +void symbol_destructor_set (symbol *sym, code_props const *destructor); -/** Get the grammar location of the computed \c \%destructor for \c sym. - - \pre symbol_destructor_get (sym) != NULL */ -location symbol_destructor_location_get (symbol *sym); +/** Get the computed \c \%destructor for \c sym, which was initialized with + \c code_props_none_init if there's no \c \%destructor. */ +code_props const *symbol_destructor_get (symbol const *sym); /** Set the \c printer associated with \c sym. */ -void symbol_printer_set (symbol *sym, const char *printer, location loc); +void symbol_printer_set (symbol *sym, code_props const *printer); -/** Get the computed \c \%printer for \c sym, or \c NULL if none. */ -const char *symbol_printer_get (symbol *sym); - -/** Get the grammar location of the computed \c \%printer for \c sym. - - \pre symbol_printer_get (sym) != NULL */ -location symbol_printer_location_get (symbol *sym); +/** Get the computed \c \%printer for \c sym, which was initialized with + \c code_props_none_init if there's no \c \%printer. */ +code_props const *symbol_printer_get (symbol const *sym); /* Set the \c precedence associated with \c sym. @@ -180,6 +172,11 @@ void symbol_class_set (symbol *sym, symbol_class class, location loc, void symbol_user_token_number_set (symbol *sym, int user_number, location loc); + +/*------------------. +| Special symbols. | +`------------------*/ + /** The error token. */ extern symbol *errtoken; /** The token for unknown tokens. */ @@ -197,15 +194,46 @@ extern symbol *startsymbol; extern location startsymbol_location; -/*---------------. -| Symbol table. | -`---------------*/ +/*-----------------. +| Semantic types. | +`-----------------*/ + +/** A semantic type and its associated \c \%destructor and \c \%printer. + + Access the fields of this struct only through the interface functions in + this file. \sa symbol::destructor */ +typedef struct { + /** The key, name of the semantic type. */ + uniqstr tag; + + /** Any \c %destructor declared for this semantic type. */ + code_props destructor; + /** Any \c %printer declared for this semantic type. */ + code_props printer; +} semantic_type; + +/** Fetch (or create) the semantic type associated to KEY. */ +semantic_type *semantic_type_from_uniqstr (const uniqstr key); + +/** Fetch (or create) the semantic type associated to KEY. */ +semantic_type *semantic_type_get (const char *key); + +/** Set the \c destructor associated with \c type. */ +void semantic_type_destructor_set (semantic_type *type, + code_props const *destructor); + +/** Set the \c printer associated with \c type. */ +void semantic_type_printer_set (semantic_type *type, + code_props const *printer); +/*----------------------------------. +| Symbol and semantic type tables. | +`----------------------------------*/ -/** Create the symbol table. */ +/** Create the symbol and semantic type tables. */ void symbols_new (void); -/** Free all the memory allocated for symbols. */ +/** Free all the memory allocated for symbols and semantic types. */ void symbols_free (void); /** Check that all the symbols are defined. @@ -220,14 +248,18 @@ void symbols_check_defined (void); void symbols_pack (void); -/*-----------------------------------. -| Default %destructor and %printer. | -`-----------------------------------*/ +/*---------------------------------------. +| Default %destructor's and %printer's. | +`---------------------------------------*/ -/** Set the default \c \%destructor. */ -void default_destructor_set (const char *destructor, location loc); +/** Set the default \c \%destructor for tagged values. */ +void default_tagged_destructor_set (code_props const *destructor); +/** Set the default \c \%destructor for tagless values. */ +void default_tagless_destructor_set (code_props const *destructor); -/** Set the default \c \%printer. */ -void default_printer_set (const char *printer, location loc); +/** Set the default \c \%printer for tagged values. */ +void default_tagged_printer_set (code_props const *printer); +/** Set the default \c \%printer for tagless values. */ +void default_tagless_printer_set (code_props const *printer); #endif /* !SYMTAB_H_ */