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Split the default %destructor/%printer into two kinds: <*> and <!>.

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Discussed starting at
<http://lists.gnu.org/archive/html/bison-patches/2006-09/msg00060.html>.
* NEWS (2.3a+): Mention.
* doc/bison.texinfo (Freeing Discarded Symbols): Document this and the
previous change today related to mid-rules.
(Bison Symbols): Remove %symbol-default and add <*> and <!>.
* src/parser-gram.y (PERCENT_SYMBOL_DEFAULT): Remove.
(TYPE_TAG_ANY): Add as <*>.
(TYPE_TAG_NONE): Add as <!>.
(generic_symlist_item): Remove RHS for %symbol-default and add RHS's
for <*> and <!>.
* src/scan-gram.l (PERCENT_SYMBOL_DEFAULT): Remove.
(TYPE_TAG_ANY, TYPE_TAG_NONE): Add.
* src/symlist.c (symbol_list_default_new): Split into tagged and
tagless versions.
(symbol_list_destructor_set, symbol_list_printer_set): Split
SYMLIST_DEFAULT case into SYMLIST_DEFAULT_TAGGED and
SYMLIST_DEFAULT_TAGLESS.
* src/symlist.h: Update symbol_list_default*_new prototypes.
(symbol_list.content_type): Split enum value SYMLIST_DEFAULT into
SYMLIST_DEFAULT_TAGGED and SYMLIST_DEFAULT_TAGLESS.
* src/symtab.c (default_destructor, default_destructor_location,
default_printer, default_printer_location): Split each into tagged and
tagless versions.
(symbol_destructor_get, symbol_destructor_location_get,
symbol_printer_get, symbol_printer_location_get): Implement tagged
default and tagless default cases.
(default_destructor_set, default_printer_set): Split each into tagged
and tagless versions.
* src/symtab.h: Update prototypes.
* tests/actions.at (Default %printer and %destructor): Rename to...
(Default tagless %printer and %destructor): ... this, and extend.
(Per-type %printer and %destructor): Rename to...
(Default tagged and per-type %printer and %destructor): ... this, and
extend.
(Default %printer and %destructor for user-defined end token): Extend.
(Default %printer and %destructor are not for error or $undefined):
Update.
(Default %printer and %destructor are not for $accept): Update.
(Default %printer and %destructor for mid-rule values): Extend.
* tests/input.at (Default %printer and %destructor redeclared): Extend.
(Unused values with default %destructor): Extend.
This commit is contained in:
Joel E. Denny
2006-10-21 10:03:35 +00:00
parent f91b162944
commit 12e3584054
13 changed files with 870 additions and 602 deletions
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15
src/symlist.h
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@@ -29,10 +29,13 @@
typedef struct symbol_list
{
/**
* Whether this node contains a symbol, a semantic type, or a
* \c \%symbol-default.
* Whether this node contains a symbol, a semantic type, a \c <*>, or a
* \c <!>.
*/
enum { SYMLIST_SYMBOL, SYMLIST_TYPE, SYMLIST_DEFAULT } content_type;
enum {
SYMLIST_SYMBOL, SYMLIST_TYPE,
SYMLIST_DEFAULT_TAGGED, SYMLIST_DEFAULT_TAGLESS
} content_type;
union {
/** The symbol or \c NULL iff <tt>node_type = SYMLIST_SYMBOL</tt>. */
symbol *sym;
@@ -76,8 +79,10 @@ symbol_list *symbol_list_sym_new (symbol *sym, location loc);
/** Create a list containing \c type_name at \c loc. */
symbol_list *symbol_list_type_new (uniqstr type_name, location loc);
/** Create a list containing a \c \%symbol-default at \c loc. */
symbol_list *symbol_list_default_new (location loc);
/** Create a list containing a \c <*> at \c loc. */
symbol_list *symbol_list_default_tagged_new (location loc);
/** Create a list containing a \c <!> at \c loc. */
symbol_list *symbol_list_default_tagless_new (location loc);
/** Print this list.