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Its value describes the states that are permitted to contain default rules: "all", "consistent", or "accepting". * src/reader.c (reader): Default lr.default_rules to "all". Check for a valid lr.default_rules value. * src/lalr.c (state_lookahead_tokens_count): If lr.default_rules is "accepting", then only mark the accepting state as consistent. (initialize_LA): Tell state_lookahead_tokens_count whether lr.default_rules is "accepting". * src/tables.c (action_row): If lr.default_rules is not "all", then disable default rules in inconsistent states. * src/print.c (print_reductions): Use this opportunity to perform some assertions about whether lr.default_rules was obeyed correctly. * tests/local.at (AT_TEST_TABLES_AND_PARSE): New macro that helps with checking the parser tables for a grammar. * tests/input.at (%define lr.default_rules invalid values): New test group. * tests/reduce.at (AT_TEST_LR_DEFAULT_RULES): New macro using AT_TEST_TABLES_AND_PARSE. (`no %define lr.default_rules'): New test group generated by AT_TEST_LR_DEFAULT_RULES. (`%define lr.default_rules "all"'): Likewise. (`%define lr.default_rules "consistent"'): Likewise. (`%define lr.default_rules "accepting"'): Likewise.
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