Fix bug such that the first pushed token's value and location are

[bison.git] / ChangeLog

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+2006-12-20  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       Fix bug such that the first pushed token's value and location are
+       sometimes overwritten (sometimes by %initial-action) before being used.
+       * data/push.c (yypush_parse): Rename arguments yynchar, yynlval, and
+       yynlloc to yypushed_char, yypushed_val, and yypushed_loc for clarity.
+       For the first yypush_parse invocation, initialize yychar to YYEMPTY to
+       more closely mimic the pull parser logic.
+       Don't copy the pushed token to yychar, yylval, and yylloc until it's
+       time to read a token, which is after any initialization of yylval and
+       yylloc.
+       (gottoken): Rename label to...
+       (yyread_pushed_token): ... for clarity and to avoid infringing on the
+       user namespace.
+
+2006-12-20  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       Rearrange initialization of the parser state variables so that the
+       skeleton doesn't have to have a copy for pull mode and another for push
+       mode.  This patch also fixes at least a bug such that yylloc was not
+       initialized (with b4_location_initial_line and
+       b4_location_initial_column) upon calling yypush_parse.  However, that
+       initialization now overwrites the first token's location;
+       %initial-action assigning @$ already did the same thing, and both bugs
+       will be fixed in a later patch.
+       * data/push.c (b4_yyssa): Remove and convert all uses to just yyssa.
+       (b4_declare_parser_state_variables): Remove initialization of yytoken,
+       yyss, yyvs, yyls, and yystacksize.
+       (yypstate_new): Remove initialization of some yypstate fields: yystate,
+       yyerrstatus, yytoken, yyss, yyvs, yyls, yystacksize, yyssp, yyvsp, and
+       yylsp.
+       (yyssa, yyvsa, yylsa): For push mode, #define each NAME in this list to
+       yyps->NAME so it can be used in yypush_parse.
+       (yyparse or yypush_parse): For yypush_parse, don't print the
+       "Starting parse" diagnostic for invocations after the first.
+       Add initialization of yytoken, yyss, yyvs, yyls, and yystacksize; for
+       yypush_parse, only do it for the first invocation.
+       Allow yystate, yyerrstatus, yyssp, yyvsp, yylsp, and yylloc
+       initialization to occur in yypush_parse but only on the first
+       invocation.
+
+2006-12-19  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       * data/push.c: Add CPP guards around push parser declarations in both
+       the header and the code file.
+       In the code file, move the push parser declarations to the same place
+       they appear in the header file.
+       Clean up the M4 some, especially the inconsistent underquoting in
+       some b4_c_function_def and b4_c_function_decl uses.
+
 2006-12-19  Joel E. Denny  <jdenny@ces.clemson.edu>
 
        Encapsulate the push parser state variables into an M4 macro so the