Encapsulate the push parser state variables into an M4 macro so the

[bison.git] / ChangeLog

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+2006-12-19  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       Encapsulate the push parser state variables into an M4 macro so the
+       push skeleton doesn't have to list them again for pull mode's yyparse.
+       For push mode, remove yypush_parse's local equivalents of these
+       variables to eliminate unnecessary copying between the two sets at
+       run-time.  This patch also fixes at least a bug related to multiple
+       %initial-action invocations in push mode.
+       * data/push.c (b4_declare_parser_variables): Rename to...
+       (b4_declare_scanner_communication_variables): ... this for clarity and
+       update both uses.
+       (b4_declare_yyparse_variables): Remove and move its contents to the one
+       spot where it was invoked.
+       (b4_declare_parser_state_variables): New macro containing the parser
+       state variables required by push mode.
+       (struct yypstate): Replace all fields but yynew with
+       b4_declare_parser_state_variables.
+       (yystate, yyn, yyresult, yyerrstatus, yytoken, yyss, yyssp, yyvs,
+       yyvsp, yyls, yylsp, yystacksize, yyval, yyloc): 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 yyparse in pull mode, replace local
+       parser state variable declarations with
+       b4_declare_parser_state_variables.
+       Don't initialize parser state variables when calling yypush_parse since
+       yypstate_new already does that.
+       Invoke the user's initial action only upon the first yypush_parse
+       invocation.
+       Remove all code that copies between the local parser state variables
+       and the yypstate.
+
+2006-12-19  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       * data/push.c (union yyalloc): Rename yyss, yyvs, and yyls fields to
+       prevent a name collision in a future patch where these names will
+       sometimes be #define'd.
+       (YYSTACK_RELOCATE): Add an argument to select a union yyalloc field
+       since it no longer has the same name as the existing argument.
+       (yyparse or yypush_parse): Update all uses of YYSTACK_RELOCATE.
+
+2006-12-19  Paolo Bonzini  <bonzini@gnu.org>
+       and Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       * doc/bison.texinfo (Decl Summary): In the %language entry, mention
+       that the argument is case-insensitive, and there's no `=' here.
+       For the %skeleton entry, mention that %language is better.
+       (Bison Options): Likewise for --language and --skeleton.  Move the
+       --skeleton entry so that the `Tuning the parser' section is sorted
+       alphabetically on long options.
+       (C++ Bison Interface): Don't use the word skeleton.  Don't explain the
+       %language directive in detail here; cross-reference the %language
+       documentation instead.
+       (Calc++ Parser): Use `%require "@value{VERSION}"' rather than
+       `%require "2.3b"' so that the example is always up-to-date.
+       (Bison Symbols): Add entries for %language and %skeleton.
+       * examples/extexi (normalize): Instead of replacing every %require
+       argument with the current Bison version, just substitute for
+       `@value{VERSION}'.  This guarantees that we're testing what actually
+       appears in the documentation.
+       * examples/calc++/Makefile.am ($(calc_extracted)): Use `$(VERSION)'
+       rather than `@VERSION@'.
+
 2006-12-18  Paul Eggert  <eggert@cs.ucla.edu>
 
        * NEWS: Reword the %language news a bit, and put it earlier.