X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/7742ddebf1f73cc15138d41c11a39f32b43c3ef5..931394cbc10909854852366d589f1d25527922fc:/ChangeLog diff --git a/ChangeLog b/ChangeLog index 8f86c129..963bdc49 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,453 @@ +2001-12-29 Akim Demaille + + * tests/actions.at (Mid-rule actions): Output on a single line + instead of several. + + +2001-12-29 Akim Demaille + + * doc/bison.texinfo: Formatting changes. + +2001-12-29 Akim Demaille + + Don't store the token defs in a muscle, just be ready to output it + on command. Now possible via `symbols'. Fixes a memory leak. + + * src/output.c (token_definitions_output): New. + (output_parser, header_output): Use it. + * src/reader.c (symbols_save): Remove. + + +2001-12-29 Akim Demaille + + * src/bison.simple: Do not provide a default for YYSTYPE and + YYLTYPE before the user's prologue. Otherwise it's hardly... a + default. + + +2001-12-29 Akim Demaille + + Mid-rule actions are simply... ignored! + + * src/reader.c (readgram): Be sure to attach mid-rule actions to + the empty-rule associated to the dummy symbol, not to the host + rule. + * tests/actions.at (Mid-rule actions): New. + + +2001-12-29 Akim Demaille + + Memory leak. + + * src/reader.c (reader): Free grammar. + +2001-12-29 Akim Demaille + + Memory leak. + + * src/LR0.c (new_itemsets): Don't allocate `shift_symbol' here, + since it allocates it for each state, although only one is needed. + (allocate_storage): Do it here. + + +2001-12-29 Akim Demaille + + * src/options.h, src/options.c (create_long_option_table): Rename + as... + (long_option_table_new): this, with a clearer prototype. + (percent_table): Remove, unused, + * src/getargs.c (getargs): Adjust. + + +2001-12-29 Akim Demaille + + * src/LR0.c, src/conflicts.c, src/lalr.c, src/lalr.h, src/output.c + * src/print.c, src/print_graph.c, src/state.h: Rename state_table + as states. + + +2001-12-29 Akim Demaille + + * src/lalr.c (build_relations): Rename `states' as `states1'. + Sorry, I don't understand exactly what it is, no better name... + + +2001-12-29 Akim Demaille + + * src/closure.c, src/conflicts.c, src/derives.c, src/gram.c + * src/gram.h, src/lalr.c, src/nullable.c, src/output.c, src/print.c + * src/print_graph.c, src/reader.c, src/reduce.c: Rename rule_table + as rules. + + +2001-12-29 Akim Demaille + + * src/gram.c (rprec, rprecsym, rassoc): Remove, unused since long + ago. + + +2001-12-29 Akim Demaille + + * src/reader.c, src/reader.h (user_toknums): Remove. + Adjust all users to use symbols[i]->user_token_number. + + +2001-12-29 Akim Demaille + + * src/gram.c, src/gram.h (sprec, sassoc): Remove. + Adjust all users to use symbols[i]->prec or ->assoc. + + +2001-12-29 Akim Demaille + + * src/reader.c, src/reader.h (tags): Remove. + Adjust all users to use symbols[i]->tag. + + +2001-12-29 Akim Demaille + + * src/gram.h, src/gram.c (symbols): New, similar to state_table + and rule_table. + * src/reader.c (packsymbols): Fill this table. + Drop sprec. + * src/conflicts.c (resolve_sr_conflict): Adjust. + * src/reduce.c (reduce_grammar): Adjust: just sort symbols, a + single table. + Use symbols[i]->tag instead of tags[i]. + + +2001-12-29 Akim Demaille + + * tests/calc.at (_AT_DATA_CALC_Y): Also use %union. + In addition, put a comment in there, to replace... + * tests/regression.at (%union and C comments): Remove. + + +2001-12-29 Akim Demaille + + * tests/regression.at (Web2c Actions): Blindly move the actual + output as expected output. The contents *seem* right to me, but I + can't pretend reading perfectly parser tables... Nonetheless, all + the other tests pass correctly, the table look OK, even though the + presence of `$axiom' is to be noted: AFAICS it is useless (but + harmless). + + +2001-12-29 Akim Demaille + + * src/reader.c (readgram): Don't add the rule 0 if there were no + rules read. In other words, add it _after_ having performed + grammar sanity checks. + Fixes the `tests/regression.at (Invalid input: 1)' Failure. + + +2001-12-29 Akim Demaille + + * tests/regression.at (Web2c Report): Catch up: the rule 0 is now + visible, and some states have now a different number. + + +2001-12-29 Akim Demaille + + * src/reader.c (readgram): Bind the initial rule's lineno to that + of the first rule. + * tests/regression.at (Rule Line Numbers, Unresolved SR Conflicts): + (Solved SR Conflicts): Adjust rule 0's line number. + + +2001-12-29 Akim Demaille + + Fix the `GAWK Grammar' failure. + + * src/LR0.c (final_state): Initialize to -1 so that we do compute + the reductions of the first state which was mistakenly confused + with the final state because precisely final_state was initialized + to 0. + * tests/sets.at (Nullable): Adjust: state 0 does have lookaheads, + now noticed by Bison. + * tests/regression.at (Rule Line Numbers): Adjust: state 0 does + have a reduction on $default. + + +2001-12-29 Akim Demaille + + * src/gram.c (ritem_print): Be sure to subtract 1 when displaying + rule line numbers. + * src/closure.c (print_closure): Likewise. + * src/derives.c (print_derives): Likewise. + * tests/sets.at (Nullable): Adjust: the rule numbers are correct + now. + +2001-12-29 Akim Demaille + + * src/lalr.c (lookaheads_print): New. + (lalr): Call it when --trace-flag. + * tests/sets.at (Nullable): Adjust: when tracing, the lookaheads + are dumped. + + +2001-12-29 Akim Demaille + + * src/derives.c (print_derives): Be sure to use `>= 0', not `> 0', + when walking through ritem, even via rule->rhs. + * src/reduce.c (dump_grammar, useful_production, reduce_output) + (useful_production, useless_nonterminals): Likewise. + (reduce_grammar_tables): Likewise, plus update nritems. + * src/nullable.c (set_nullable): Likewise. + * src/lalr.c (build_relations): Likewise. + * tests/sets.at (Nullable): Adjust. + Fortunately, now, the $axiom is no longer nullable. + + +2001-12-29 Akim Demaille + + * src/LR0.c (generate_states): Use nritems, not nitems, nor using + the 0-sentinel. + * src/gram.c (ritem_longest_rhs): Likewise. + * src/reduce.c (nonterminals_reduce): Likewise. + * src/print_graph.c (print_graph): Likewise. + * src/output.c (output_rule_data): Likewise. + * src/nullable.c (set_nullable): Likewise. + +2001-12-29 Akim Demaille + + * src/output.c: Comment changes. + +2001-12-27 Paul Eggert + + * src/bison.simple (YYSTACK_ALLOC, YYSIZE_T): Remove special + cases for non-GNU systems like AIX, HP-UX, SGI, Sun, and + Sparc, as they were causing more porting problems than the + (minor) performance improvement was worth. + + Also, catch up with 1.31's YYSTD. + +2001-12-27 Akim Demaille + + * src/output.c (output_gram): Rely on nritems, not the + 0-sentinel. See below. + Use -1 as separator, not 0. + * src/bison.simple (yyparse): Subtract 1 to the rule numbers. + Rely on -1 as separator in yyrhs, instead of 0. + * tests/calc.at (AT_CHECK_CALC): Now, the parsers no longer issue + twice `Now at end of input', therefore there are two lines less to + expect. + +2001-12-27 Akim Demaille + + * tests/regression.at (Unresolved SR Conflicts): + (Solved SR Conflicts, Rule Line Numbers): Adjust to the changes + below. + +2001-12-27 Akim Demaille + + * src/LR0.c (new_state): Recognize the final state by the fact it + is reached by eoftoken. + (insert_start_shifting_state, insert_eof_shifting_state) + (insert_accepting_state, augment_automaton): Remove, since now + these states are automatically computed from the initial state. + (generate_states): Adjust. + * src/print.c: When reporting a rule number to the user, substract + 1, so that the axiom rule is rule 0, and the first user rule is 1. + * src/reduce.c: Likewise. + * src/print_graph.c (print_core): For the time being, just as for + the report, depend upon --trace-flags to dump the full set of + items. + * src/reader.c (readgram): Once the grammar read, insert the rule + 0: `$axiom: START-SYMBOL $'. + * tests/set.at: Adjust: rule 0 is now displayed, and since the + number of the states has changed (the final state is no longer + necessarily the last), catch up. + +2001-12-27 Akim Demaille + + Try to make the use of the eoftoken valid. Given that its value + is 0 which was also used as a sentinel in ritem, (i) make sure >= 0 + is used instead of > 0 where appropriate, (ii), depend upon nritems + instead of the 0-sentinel. + + * src/gram.h, src/gram.c (nritems): New. + Expected to be duplication of nitems, but for the time being... + * src/reader.c (packgram): Assert nritems and nitems are equal. + * src/LR0.c (allocate_itemsets, new_itemsets): Adjust. + * src/closure.c (print_closure, print_fderives): Likewise. + * src/gram.c (ritem_print): Likewise. + * src/print.c (print_core, print_grammar): Likewise. + * src/print_graph.c: Likewise. + +2001-12-27 Akim Demaille + + * src/main.c (main): If there are complains after grammar + reductions, then output the report anyway if requested, then die. + * src/symtab.c (bucket_new): Initialize `value' to -1, not 0. + * src/reader.c (eoftoken): New. + (parse_token_decl): If the token being defined has value `0', it + is the eoftoken. + (packsymbols): No longer hack `tags' to insert `$' by hand. + Be sure to preserve the value of the eoftoken. + (reader): Make sure eoftoken is defined. + Initialize nsyms to 0: now eoftoken is created just like the others. + * src/print.c (print_grammar): Don't special case the eof token. + * src/regression.at: Adjust: `$' has value 0, not -1, which was a + lie anyway, albeit pleasant. + * tests/calc.at: Exercise error messages with eoftoken. + Change the grammar so that empty input is invalid. + Adjust expectations. + When yyungeting, be sure to use a valid yylloc: use last_yylloc. + +2001-12-27 Akim Demaille + + * configure.in: Check the protos of strchr ans strspn. + Replace strchr if needed. + * src/system.h: Provide the protos of strchr, strspn and memchr if + missing. + * lib/strchr.c: New. + * src/reader.c (symbols_save): Use strchr. + +2001-12-27 Akim Demaille + + * src/print.c, src/print_graph.c (escape): New. + Use it to quote the TAGS outputs. + * src/print_graph.c (print_state): Now errors are in red, and + reductions in green. + Prefer high to wide: output the state number on a line of its own. + +2001-12-27 Akim Demaille + + * src/state.h, src/state.c (reductions_new): New. + * src/LR0.c (set_state_table): Let all the states have a + `reductions', even if reduced to 0. + (save_reductions): Adjust. + * src/lalr.c (initialize_LA, initialize_lookaheads): Adjust. + * src/print.c (print_reductions, print_actions): Adjust. + * src/output.c (action_row): Adjust. + +2001-12-27 Akim Demaille + + * src/state.h, src/state.c (errs_new, errs_dup): New. + * src/LR0.c (set_state_table): Let all the states have an errs, + even if reduced to 0. + * src/print.c (print_errs, print_reductions): Adjust. + * src/output.c (output_actions, action_row): Adjust. + * src/conflicts.c (resolve_sr_conflict): Adjust. + +2001-12-27 Akim Demaille + + * src/lalr.c (set_goto_map, initialize_F): Use SHIFT_SYMBOL. + +2001-12-27 Akim Demaille + + * src/conflicts.c, src/conflicts.h (print_reductions): Move to... + * src/print.c: here. + (lookaheadset, shiftset): New, used as additional storage by + print_reductions. + (print_results): Adjust. + (print_shifts, print_gotos, print_errs): New, extracted from... + (print_actions): here. + * src/print_graph.c (print_actions): Remove dead code. + +2001-12-27 Akim Demaille + + * src/reader.c (copy_dollar, copy_at): Better checking of `n' in + `$n' and `@n'. + +2001-12-27 Akim Demaille + + * src/lalr.c (add_lookback_edge): Use state_t instead of ints. + (build_relations): Adjust. + +2001-12-27 Akim Demaille + + * src/lalr.c (set_goto_map): Remove a wrong but benign loop + duplication. + +2001-12-27 Akim Demaille + + * src/reader.c (packgram): Catch nitems overflows. + +2001-12-27 Akim Demaille + + * src/files.c, src/files.h (guard_obstack): Remove. + * src/output.c (output): Adjust. + * src/reader.c (parse_braces): New, factoring... + (copy_action, copy_guard): these two which are renamed as... + (parse_action, parse_guard): these. + As a voluntary consequence, using braces around guards is now + mandatory. + +2001-12-27 Akim Demaille + + * src/gram.h (rule_t): `guard' and `guard_line' are new members. + * src/reader.c (symbol_list): `guard' and `guard_line' are new + members. + (symbol_list_new): Adjust. + (copy_action): action_line is the first line, not the last. + (copy_guard): Just as for actions, store the `action' only, not + the switch/case/break flesh. + Don't parse the user action that might follow the guard, let... + (readgram): do it, i.e., now, there can be an action after a + guard. + In other words the guard is just explicitly optional. + (packgram): Adjust. + * src/output.c (guards_output): New. + (output_parser): Call it when needed. + (output): Also free the guard and attrs obstacks. + * src/files.c, src/files.h (obstack_save): Remove. + (output_files): Remove. + As a result, if one needs the former `.act' file, using an + appropriate skeleton which requires actions and guards is now + required. + * src/main.c (main): Adjust. + * tests/semantic.at: New. + * tests/regression.at: Use `input.y' as input file name. + Avoid 8+3 problems by requiring input.c when the test needs the + parser. + +2001-12-27 Akim Demaille + + * src/reader.c (symbol_list_new): Be sure to initialize all the + fields. + +2001-12-27 Akim Demaille + + All the hacks using a final pseudo state are now useless. + + * src/LR0.c (set_state_table): state_table holds exactly nstates. + * src/lalr.c (nLA): New. + (initialize_LA, compute_lookaheads, initialize_lookaheads): Use it + instead of lookaheadsp from the pseudo state (nstate + 1). + +2001-12-27 Akim Demaille + + * src/output.c (action_row, token_actions): Use a state_t instead + of a integer, and nlookaheads instead of the following state's + lookaheadsp. + +2001-12-27 Akim Demaille + + * src/conflicts.c (log_resolution, flush_shift) + (resolve_sr_conflict, set_conflicts, solve_conflicts) + (count_sr_conflicts, count_rr_conflicts, conflicts_output) + (conflicts_print, print_reductions): Use a state_t instead of an + integer when referring to a state. + As much as possible, depend upon nlookaheads, instead of the + `lookaheadsp' member of the following state (since lookaheads of + successive states are successive, the difference between state n + 1 + and n served as the number of lookaheads for state n). + * src/lalr.c (add_lookback_edge): Likewise. + * src/print.c (print_core, print_actions, print_state) + (print_results): Likewise. + * src/print_graph.c (print_core, print_actions, print_state) + (print_graph): Likewise. + * src/conflicts.h: Adjust. + +2001-12-27 Akim Demaille + + * src/bison.hairy: Formatting/comment changes. + ANSIfy. + Remove `register' indications. + Add plenty of `static'. + 2001-12-27 Akim Demaille * src/output.c (prepare): Drop the muscle `ntbase' which @@ -6,7 +456,6 @@ Use YYNTOKENS only, which is documented, but not YYNTBASE, which is an undocumented synonym. - 2001-12-22 Akim Demaille * src/output.c (output_table_data): Change the prototype to use