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[Home]->[Documentation]->[Syntac Universal Parser]->[Other Grammars]->[Extended Backus-Naur form (EBNF)]->[Symbols]->[expression_modifier]

Contents Entry Points syntac_file ebnf::syntac_file Declaration Composition State Machine Symbols EOF ebnf::EOF Declaration Composition State Machine abnf_value ebnf::abnf_value Declaration Composition State Machine access_specifier ebnf::access_specifier Declaration Composition State Machine additional_regexp_concat_list ebnf::additional_regexp_concat_list Declaration Composition State Machine additional_regexp_sub_intersect ebnf::additional_regexp_sub_intersect Declaration Composition State Machine additional_regexp_sub_range ebnf::additional_regexp_sub_range Declaration Composition State Machine additional_regexp_union_list ebnf::additional_regexp_union_list Declaration Composition State Machine additional_symexp_concat_list ebnf::additional_symexp_concat_list Declaration Composition State Machine additional_symexp_union_list ebnf::additional_symexp_union_list Declaration Composition State Machine alpha_digit_spacebar<std::string> ebnf::alpha_digit_spacebar<std::string> Declaration Composition State Machine append_symexp_union_list ebnf::append_symexp_union_list Declaration Composition State Machine base_clause ebnf::base_clause Declaration Composition State Machine base_specifier ebnf::base_specifier Declaration Composition State Machine bdigit<std::string> ebnf::bdigit<std::string> Declaration Composition State Machine bdigit_roll ebnf::bdigit_roll Declaration Composition State Machine bin_char ebnf::bin_char Declaration Composition State Machine bin_value ebnf::bin_value Declaration Composition State Machine body_declaration ebnf::body_declaration Declaration Composition State Machine character_set_elem ebnf::character_set_elem Declaration Composition State Machine character_set_elem_first_not_oneof ebnf::character_set_elem_first_not_oneof Declaration Composition State Machine character_set_elem_first_oneof ebnf::character_set_elem_first_oneof Declaration Composition State Machine class_definition ebnf::class_definition Declaration Composition State Machine class_head ebnf::class_head Declaration Composition State Machine class_name ebnf::class_name Declaration Composition State Machine code_block ebnf::code_block Declaration Composition State Machine code_block_in ebnf::code_block_in Declaration Composition State Machine code_block_in<std::string> ebnf::code_block_in<std::string> Declaration Composition State Machine code_block_sub ebnf::code_block_sub Declaration Composition State Machine comment ebnf::comment Declaration Composition State Machine csym ebnf::csym Declaration Composition State Machine csymf ebnf::csymf Declaration Composition State Machine dec_char ebnf::dec_char Declaration Composition State Machine dec_character ebnf::dec_character Declaration Composition State Machine dec_value ebnf::dec_value Declaration Composition State Machine digit ebnf::digit Declaration Composition State Machine digit<std::string> ebnf::digit<std::string> Declaration Composition State Machine entrypoint ebnf::entrypoint Declaration Composition State Machine escaped_character ebnf::escaped_character Declaration Composition State Machine expands_to ebnf::expands_to Declaration Composition State Machine expands_to_concat ebnf::expands_to_concat Declaration Composition State Machine expands_to_union ebnf::expands_to_union Declaration Composition State Machine expression_modifier ebnf::expression_modifier Declaration Composition State Machine filepath ebnf::filepath Declaration Composition State Machine hex_char ebnf::hex_char Declaration Composition State Machine hex_character ebnf::hex_character Declaration Composition State Machine hex_value ebnf::hex_value Declaration Composition State Machine identifier ebnf::identifier Declaration Composition State Machine identifier<std::string> ebnf::identifier<std::string> Declaration Composition State Machine label ebnf::label Declaration Composition State Machine label_name_first ebnf::label_name_first Declaration Composition State Machine label_name_rest ebnf::label_name_rest Declaration Composition State Machine labeldef ebnf::labeldef Declaration Composition State Machine lws ebnf::lws Declaration Composition State Machine lwsnl ebnf::lwsnl Declaration Composition State Machine nested_name_specifier ebnf::nested_name_specifier Declaration Composition State Machine oct_character ebnf::oct_character Declaration Composition State Machine odigit<std::string> ebnf::odigit<std::string> Declaration Composition State Machine param_list<std::string> ebnf::param_list<std::string> Declaration Composition State Machine param_list_in ebnf::param_list_in Declaration Composition State Machine param_list_sub ebnf::param_list_sub Declaration Composition State Machine production_rule ebnf::production_rule Declaration Composition State Machine punct<std::string> ebnf::punct<std::string> Declaration Composition State Machine quoted_char ebnf::quoted_char Declaration Composition State Machine quoted_punct<std::string> ebnf::quoted_punct<std::string> Declaration Composition State Machine quoted_string ebnf::quoted_string Declaration Composition State Machine quoted_string_elem ebnf::quoted_string_elem Declaration Composition State Machine quoted_string_rest ebnf::quoted_string_rest Declaration Composition State Machine reference ebnf::reference Declaration Composition State Machine regexp_compound ebnf::regexp_compound Declaration Composition State Machine regexp_compound_first ebnf::regexp_compound_first Declaration Composition State Machine regexp_concat_list ebnf::regexp_concat_list Declaration Composition State Machine regexp_elem_char ebnf::regexp_elem_char Declaration Composition State Machine regexp_elem_char_first ebnf::regexp_elem_char_first Declaration Composition State Machine regexp_element ebnf::regexp_element Declaration Composition State Machine regexp_element_first ebnf::regexp_element_first Declaration Composition State Machine regexp_list ebnf::regexp_list Declaration Composition State Machine regexp_modifier ebnf::regexp_modifier Declaration Composition State Machine regexp_not_oneof ebnf::regexp_not_oneof Declaration Composition State Machine regexp_oneof ebnf::regexp_oneof Declaration Composition State Machine regexp_predef_range ebnf::regexp_predef_range Declaration Composition State Machine regexp_range ebnf::regexp_range Declaration Composition State Machine regexp_range_char ebnf::regexp_range_char Declaration Composition State Machine regexp_range_char_first_not_oneof ebnf::regexp_range_char_first_not_oneof Declaration Composition State Machine regexp_range_char_first_oneof ebnf::regexp_range_char_first_oneof Declaration Composition State Machine regexp_sub_element ebnf::regexp_sub_element Declaration Composition State Machine regexp_sub_intersect ebnf::regexp_sub_intersect Declaration Composition State Machine regexp_sub_range ebnf::regexp_sub_range Declaration Composition State Machine regexp_tail ebnf::regexp_tail Declaration Composition State Machine regexp_tail_end ebnf::regexp_tail_end Declaration Composition State Machine regular_expression ebnf::regular_expression Declaration Composition State Machine sub_template_block ebnf::sub_template_block Declaration Composition State Machine symbol ebnf::symbol Declaration Composition State Machine symbol_append_concat ebnf::symbol_append_concat Declaration Composition State Machine symbol_append_union ebnf::symbol_append_union Declaration Composition State Machine symbol_declare ebnf::symbol_declare Declaration Composition State Machine symbol_expression ebnf::symbol_expression Declaration Composition State Machine symexp_compound ebnf::symexp_compound Declaration Composition State Machine symexp_compound_rfc ebnf::symexp_compound_rfc Declaration Composition State Machine symexp_concat_list ebnf::symexp_concat_list Declaration Composition State Machine symexp_element ebnf::symexp_element Declaration Composition State Machine symexp_union_element ebnf::symexp_union_element Declaration Composition State Machine syntac_file template_block ebnf::template_block Declaration Composition State Machine template_in_block ebnf::template_in_block Declaration Composition State Machine terminal ebnf::terminal Declaration Composition State Machine typedefinition ebnf::typedefinition Declaration Composition State Machine typedefinition_bracketed ebnf::typedefinition_bracketed Declaration Composition State Machine unicode_character ebnf::unicode_character Declaration Composition State Machine ws ebnf::ws Declaration Composition State Machine xdigit ebnf::xdigit Declaration Composition State Machine xdigit<std::string> ebnf::xdigit<std::string> Declaration Composition State Machine xdigit_roll ebnf::xdigit_roll Declaration Composition State Machine Grammar Extended Backus-Naur form (EBNF) Grammar

ebnf::expression_modifier Declaration expression_modifier[parser_type & tree, arc_token & current_link, parser_type::arc_label_type & current_dollar_label] ::=         "?"    {                     current_link = tree.add_iterate_condition(current_link, 0, 1);                 tree.add_dollar_label_before(tree.arc_label(* current_link), current_dollar_label);                 current_dollar_label = tree.arc_label(* current_link);             }     |    "+"    {                 current_link = tree.add_iterate_condition(current_link, 1, 0);                 tree.add_dollar_label_before(tree.arc_label(* current_link), current_dollar_label);                 current_dollar_label = tree.arc_label(* current_link);             }     |    "*"    {                 current_link = tree.add_iterate_condition(current_link, 0, 0);                 tree.add_dollar_label_before(tree.arc_label(* current_link), current_dollar_label);                 current_dollar_label = tree.arc_label(* current_link);             }     |    "{" ( ( digit+ ("," digit*)? ) | ( "," digit* ) ) "}"             {                 long _first = atol($4), _second;                 if (!$3.empty())                     { /* first form*/                     if (!$6.empty())                         _second = atol($9);                     else                         _second = _first;                     }                 else                     { /* second form*/                     _second = atol($13);                     }                 if (_second > (_first + 0x100))                     {                     std::cerr << $file << ':' << $line << ": warning: a large finite iteration range [ " << _first << " -> " << _second << " ] can use excessive stack space, consider unbounding the range" << std::endl;                     }                 current_link = tree.add_iterate_condition(current_link, _first, _second);                 tree.add_dollar_label_before(tree.arc_label(* current_link), current_dollar_label);                 current_dollar_label = tree.arc_label(* current_link);             } Composition State Machine

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