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3508ce361b
isn't a question of whether the user *declares* that symbol (in %token, for example). It's a question of whether the user by any means *defines* the symbol at all (by simply using a char token, for example). $end is defined by Bison whereas any other token with token number 0 is defined by the user. The error token is always defined by Bison regardless of whether the user declares it with %token, but we may one day let the user define error as a nonterminal instead. * NEWS (2.3+): Say "user-defined" instead of "user-declared". * doc/bison.texinfo (Freeing Discarded Symbols): Likewise, and document the meaning of "user-defined". * tests/actions.at (Default %printer and %destructor for user-declared end token): Rename to... (Default %printer and %destructor for user-defined end token): ... this. * src/symtab.c (symbol_destructor_get, symbol_printer_get): In the computation of whether to apply the default, don't maintain a list of every Bison-defined symbol. Instead, just check for a first character of '$', which a user symbol cannot have, and check for the error token.