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#define statements unless `--yacc' is specified; always use enum yytokentype. Most important discussions start at: <http://lists.gnu.org/archive/html/bison-patches/2005-09/msg00053.html>, <http://lists.gnu.org/archive/html/bison-patches/2005-12/msg00052.html>, and <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00043.html>. * NEWS (2.3+): Mention. * data/c.m4 (b4_yacc_if): New. (b4_token_enums_defines): Use b4_yacc_if to decide whether to add the token #define's. * doc/bison.texinfo (Bison Options): Describe the effect of `--yacc' on token name definitions. * src/getargs.c (usage): Capitalize `Yacc' in English. * src/output.c (prepare): Define b4_yacc_flag. * tests/regression.at (Early token definitions): Test that tokens names are defined before the pre-prologue not just before the post-prologue. Remove this test case and copy to... (Early token definitions with --yacc): ... this to test #define's. (Early token definitions without --yacc): ... and this to test enums.