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symbol_type::token () was removed: it returned the token kind of a symbol. To do that, one needs to convert from the symbol kind to the token kind, which requires a table. This broke some users' unit tests for scanners, see https://lists.gnu.org/r/bug-bison/2020-01/msg00001.html https://lists.gnu.org/r/bug-bison/2020-03/msg00020.html https://lists.gnu.org/r/help-bison/2020-04/msg00005.html Instead of making this possible again, let's check the symbol's kind instead. So give proper access to a symbol's kind. That feature existed, undocumented, as 'type_get()'. Let's rename this as 'kind()'. * data/skeletons/c++.m4, data/skeletons/glr.cc, * data/skeletons/lalr1.cc (type_get): Rename as... (kind): This. (type_get): Install a backward compatibility alias. * doc/bison.texi (Complete Symbols): Document symbol_type and symbol_type::kind.