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Initial check-in introducing experimental GLR parsing. See entry in

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ChangeLog dated 2002-06-27 from Paul Hilfinger for details.
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Paul Hilfinger
2002-06-28 02:26:44 +00:00
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2002-06-27 Akim Demaille <akim@epita.fr>
2002-06-27 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU>
Accumulated changelog for new GLR parsing features.
* src/conflicts.c (count_total_conflicts): Change name to
conflicts_total_count.
* src/conflicts.h: Ditto.
* src/output.c (token_actions): Use the new name.
(output_conflicts): Change conflp => conflict_list_heads, and
confl => conflict_list for better readability.
* data/glr.c: Use the new names.
* NEWS: Add self to GLR announcement.
* src/reader.c (free_merger_functions): Cleanup: XFREE->free.
* doc/bison.texinfo (GLR Parsers): Make corrections suggested by
Akim Demaille.
* data/bison.glr: Change name to glr.c
* data/glr.c: Renamed from bison.glr.
* data/Makefile.am: Add glr.c
* src/getargs.c:
* src/symlist.h: Add dprec and merger fields to symbol_list_s.
* src/symlist.c (symbol_list_new): Initialize dprec and merger fields.
Originally 2002-06-16 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU>
* data/bison.glr: Be sure to restore the
current #line when returning to the skeleton contents after having
exposed the input file's #line.
Originally 2002-06-13 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU>
* data/bison.glr: Bring up to date with changes to bison.simple.
Originally 2002-06-03 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU>
* data/bison.glr: Correct definitions that use b4_prefix.
Various reformatting.
(GLRStack): Make yychar (in YYPURE case) and yytokenp as part of stack.
(yyreportParseError, yyrecoverParseError, yyprocessOneStack): remove
yytokenp argument; now part of stack.
(yychar): Define to behave as documented.
(yyclearin): Ditto.
Originally 2002-05-14 Paul Hilfinger <Hilfinger@CS.Berkeley.EDU>
* src/reader.h: Add declaration for free_merger_functions.
* src/reader.c (merge_functions): New variable.
(get_merge_function): New function.
(free_merger_functions): New function.
(readgram): Check for %prec that is not followed by a symbol.
Handle %dprec and %merge declarations.
(packgram): Initialize dprec and merger fields in rules array.
* src/output.c (conflict_tos, conflrow, conflict_table, conflict_list,
conflict_list_cnt, conflict_list_free): New variables.
(table_grow): Also grow conflict_table.
(prepare_rules): Output dprec and merger tables.
(conflict_row): New function.
(action_row): Output conflict lists for GLR parser. Don't use
default reduction in conflicted states for GLR parser so that there
are spaces for the conflict lists.
(save_row): Also save conflict information.
(token_actions): Allocate conflict list.
(merger_output): New function.
(pack_vector): Pack conflict table, too.
(output_conflicts): New function to output yyconflp and yyconfl.
(output_check): Allocate conflict_tos.
(output_actions): Output conflict tables, also.
(output_skeleton): Output b4_mergers definition.
(prepare): Output b4_max_rhs_length definition.
Use 'bison.glr' as default skeleton for GLR parsers.
* src/gram.c (glr_parser): New flag.
(grammar_free): Call free_merger_functions.
* src/conflicts.c (count_rr_conflicts): Augment to optionally count
all pairs of conflicting reductions, rather than just all tokens
causing conflicts. Needed to size conflict tables.
(conflicts_output): Modify call to count_rr_conflicts for new
interface.
(conflicts_print): Ditto.
(count_total_conflicts): New function.
* src/reader.h (merger_list): New type.
(merge_functions): New variable.
* src/lex.h (tok_dprec, tok_merge): New token types.
* src/gram.h (rule_s): Add dprec and merger fields.
(glr_parser): New flag.
* src/conflicts.h (count_total_conflicts): New function.
* src/options.c (option_table): Add %dprec, %merge, and %glr-parser.
* doc/bison.texinfo (Generalized LR Parsing): New section.
(GLR Parsers): New section.
(Language and Grammar): Mention GLR parsing.
(Table of Symbols): Add %dprec, %glr-parser, %merge, GLR
Correct typo ("tge" -> "the").
* data/bison.glr: New skeleton for GLR parsing.
* tests/cxx-gram.at: New tests for GLR parsing.
* tests/testsuite.at: Include cxx-gram.at.
* tests/Makefile.am: Add cxx-gram.at.
* src/parse-gram.y:
* src/scan-gram.l: Add %dprec, %glr-parser, %merge.
* src/parse-gram.y: Grammar for %dprec, %merge, %glr-parser.
2002-06-27 Akim Demaille <akim@epita.fr>
* src/options.h, src/options.c: Remove.
* src/getargs.c (short_options, long_options): New.