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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.
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