X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/b0f4c4eaa1da1437b18d5d8e250d666133225d8a..a68b1f237e63c96ee905916424013f79d01908ba:/src/symtab.h diff --git a/src/symtab.h b/src/symtab.h index c2949233..7d8cf982 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 - Free Software Foundation, Inc. + Copyright (C) 1984, 1989, 1992, 2000-2002, 2004-2007, 2009-2012 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" /*----------. @@ -61,36 +60,31 @@ struct symbol /** The location of its first occurrence. */ location location; - /** Its \c \%type. */ + /** Its \c \%type. + + Beware that this is the type_name as was entered by the user, + including silly things such as "]" if she entered "%token <]> t". + Therefore, when outputting type_name to M4, be sure to escape it + into "@}". See quoted_output for instance. */ uniqstr type_name; + /** Its \c \%type's location. */ location type_location; /** Any \c \%destructor declared specifically for this symbol. - Access this field only through symbol's interface functions. For - 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; + Access this field only through symbol's interface + functions. For 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. */ + 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; + Access this field only through symbol's interface functions. + \sa symbol::destructor */ + code_props printer; symbol_number number; location prec_location; @@ -98,9 +92,9 @@ struct symbol 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. */ + /* Points to the other in the symbol-string pair for an alias. + Special value USER_NUMBER_HAS_STRING_ALIAS in the symbol half of the + symbol-string pair for an alias. */ symbol *alias; symbol_class class; bool declared; @@ -109,11 +103,11 @@ struct symbol /** 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 +/* `symbol->user_token_number == USER_NUMBER_HAS_STRING_ALIAS' means + this symbol has a literal string alias. For instance, `%token foo "foo"' has `"foo"' numbered regularly, and `foo' numbered as - USER_NUMBER_ALIAS. */ -#define USER_NUMBER_ALIAS -9991 + USER_NUMBER_HAS_STRING_ALIAS. */ +#define USER_NUMBER_HAS_STRING_ALIAS -9991 /* Undefined internal token number. */ #define NUMBER_UNDEFINED (-1) @@ -135,8 +129,11 @@ symbol *dummy_symbol_get (location loc); /** Is this a dummy nonterminal? */ bool symbol_is_dummy (const symbol *sym); -/** Declare the new symbol \c sym. Make it an alias of \c symval. */ -void symbol_make_alias (symbol *sym, symbol *symval, location loc); +/** + * Make \c str the literal string alias of \c sym. Copy token number, + * symbol number, and type from \c sym to \c str. + */ +void symbol_make_alias (symbol *sym, symbol *str, location loc); /** Set the \c type_name associated with \c sym. @@ -144,26 +141,18 @@ void symbol_make_alias (symbol *sym, symbol *symval, location loc); 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 computed \c \%destructor for \c sym, or \c NULL if none. */ -const char *symbol_destructor_get (symbol *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); - -/** Get the computed \c \%printer for \c sym, or \c NULL if none. */ -const char *symbol_printer_get (symbol *sym); +void symbol_printer_set (symbol *sym, code_props const *printer); -/** 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. @@ -201,22 +190,17 @@ extern location startsymbol_location; `-----------------*/ /** 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 semantic_type { +typedef struct { /** The key, name of the semantic type. */ uniqstr tag; /** Any \c %destructor declared for this semantic type. */ - const char *destructor; - /** The location of \c semantic_type::destructor. */ - location destructor_location; - + code_props destructor; /** Any \c %printer declared for this semantic type. */ - const char *printer; - /** The location of \c semantic_type::printer. */ - location printer_location; + code_props printer; } semantic_type; /** Fetch (or create) the semantic type associated to KEY. */ @@ -226,12 +210,12 @@ semantic_type *semantic_type_from_uniqstr (const uniqstr 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, const char *destructor, - location loc); +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, const char *printer, - location loc); +void semantic_type_printer_set (semantic_type *type, + code_props const *printer); /*----------------------------------. | Symbol and semantic type tables. | @@ -260,13 +244,13 @@ void symbols_pack (void); `---------------------------------------*/ /** Set the default \c \%destructor for tagged values. */ -void default_tagged_destructor_set (const char *destructor, location loc); +void default_tagged_destructor_set (code_props const *destructor); /** Set the default \c \%destructor for tagless values. */ -void default_tagless_destructor_set (const char *destructor, location loc); +void default_tagless_destructor_set (code_props const *destructor); /** Set the default \c \%printer for tagged values. */ -void default_tagged_printer_set (const char *printer, location loc); +void default_tagged_printer_set (code_props const *printer); /** Set the default \c \%printer for tagless values. */ -void default_tagless_printer_set (const char *printer, location loc); +void default_tagless_printer_set (code_props const *printer); #endif /* !SYMTAB_H_ */