# Main region. lex token DEF / 'def' / token REDEF / 'redef' / token LEX / 'lex' / token END / 'end' / token TOKEN / 'token' / token RL / 'rl' / token IGNORE / 'ignore' / token PRINT / 'print' / token PRINTS / 'prints' / token PARSE / 'parse' / token REDUCE / 'reduce' / token READ_REDUCE /'read_reduce'/ token PARSE_TREE / 'parse_tree' / token PARSE_STOP / 'parse_stop' / token CONS / 'construct' | 'cons' / token MATCH / 'match' / token REQUIRE / 'require' / token SEND / 'send' / token SEND_TREE / 'send_tree' / token NAMESPACE / 'namespace' / token REDUCTION / 'reduction' / token FOR / 'for' / token IF / 'if' / token YIELD / 'yield' / token WHILE / 'while' / token ELSIF / 'elsif' / token ELSE / 'else' / token IN / 'in' / token PARSER / 'parser' | 'accum' / token LIST / 'list' / token LIST_EL / 'list_el' / token MAP / 'map' / token MAP_EL / 'map_el' / token PTR / 'ptr' / token ITER / 'iter' / token REF / 'ref' / token EXPORT / 'export' / token RETURN / 'return' / token BREAK / 'break' / token REJECT / 'reject' / token REDUCEFIRST / 'reducefirst' / token ALIAS / 'alias' / token COMMIT / 'commit' / token NEW / 'new' / token PREEOF / 'preeof' / token GLOBAL / 'global' / token EOS / 'eos' / token CAST / 'cast' / token SWITCH / 'switch' / token CASE / 'case' / token DEFAULT / 'default' / token INT / 'int' / token BOOL / 'bool' / token VOID / 'void' / token MAKE_TOKEN / 'make_token' / token MAKE_TREE / 'make_tree' / token TYPEID / 'typeid' / token LITERAL / 'literal' / token CONTEXT / 'context' / token STRUCT / 'struct' / token NI /'ni'/ token NIL / 'nil' / token TRUE / 'true' / token FALSE / 'false' / token LEFT /'left'/ token RIGHT /'right'/ token NONASSOC /'nonassoc'/ token INCLUDE /'include'/ token id / ( 'a' .. 'z' | 'A' .. 'Z' | '_' ) . ( 'a' .. 'z' | 'A' .. 'Z' | '0' .. '9' | '_' )* / token number / ( '0' .. '9' ) + / token backtick_lit / '`' . ^( ' ' | '\n' | '\t' ) . ^( ' ' | '\n' | '\t' | '`' | ']' )* . ( '`' | '' ) / token DQ / '\"' / - ni token SQ / '\'' / - ni token TILDE / '~' / - ni token SQOPEN /'['/ token SQCLOSE /']'/ token BAR /'|'/ token FSLASH /'/'/ token COLON /':'/ token DOUBLE_COLON /'::'/ token DOT /'.'/ token ARROW /'->'/ token POPEN /'('/ token PCLOSE /')'/ token COPEN /'{'/ token CCLOSE /'}'/ token STAR /'*'/ token QUESTION /'?'/ token EQUALS /'='/ token EQ_EQ /'=='/ token BANG_EQ /'!='/ token COMMA /','/ token LT /'<'/ token GT /'>'/ token LT_EQ /'<='/ token GT_EQ /'>='/ token BANG /'!'/ token DOLLAR /'$'/ token CARET /'^'/ token AT /'@'/ token PERCENT /'%'/ token PLUS /'+'/ token MINUS /'-'/ token AMP_AMP /'&&'/ token BAR_BAR /'||'/ token DOT_DOT_DOT /'...'/ token LT_LT /'<<'/ token LARROW /'<-'/ ignore / ( '\n' | '\t' | ' ' )+ / ignore / '#' . ( ^'\n' )* . '\n' / end lex token LIT_DQ / '\"' / token LIT_DQ_NL / '\n' / token LIT_SQOPEN / '[' / token LIT_SQCLOSE / ']' / token lit_dq_data / ( ^( '\n' | '\"' | '[' | ']' | '\\' ) | '\\' . any )+ / end lex token CONS_SQ / '\'' / token CONS_SQ_NL / '\n' / token sq_cons_data / ( ^( '\n' | '\'' | '\\' ) | '\\' . any )+ / end lex token TILDE_NL / '\n' / token tilde_data / ( ^'\n' )+ / end lex token lex_id / ( 'a' .. 'z' | 'A' .. 'Z' | '_' ) . ( 'a' .. 'z' | 'A' .. 'Z' | '0' .. '9' | '_' )* / token lex_uint / ( '0' .. '9' )+ / token lex_hex / '0x' . ( '0' .. '9' | 'a' .. 'f' | 'A' .. 'F' )+ / token lex_lit / '\'' . ( ^( '\'' | '\\' ) | '\\' . any )* . ( '\'' | '\'i' ) | '\"' . ( ^( '\"' | '\\' ) | '\\' . any )* . ( '\"' | '\"i' ) / token LEX_DOT /'.'/ token LEX_BAR /'|'/ token LEX_AMP /'&'/ token LEX_DASH /'-'/ token LEX_POPEN /'('/ token LEX_PCLOSE /')'/ token LEX_STAR /'*'/ token LEX_STARSTAR /'**'/ token LEX_QUESTION /'?'/ token LEX_PLUS /'+'/ token LEX_CARET /'^'/ token LEX_DOTDOT /'..'/ token LEX_SQOPEN_POS /'['/ - ni token LEX_SQOPEN_NEG /'[^'/ - ni token LEX_FSLASH /'/'/ token LEX_DASHDASH /'--'/ token LEX_COLON_GT /':>'/ token LEX_COLON_GTGT /':>>'/ token LEX_LT_COLON /'<:'/ ignore / ( '\n' | '\t' | ' ' ) . ( '\n' | '\t' | ' ' )* / ignore / '#' . ( ^'\n' )* . '\n' / end lex token RE_DASH / '-' / token RE_CHAR / ^( '\\' | '-' | ']' ) | '\\' . any / token RE_SQCLOSE / ']' / end def start [RootItemList: root_item<*] def root_item [rl_def] :Rl commit | [literal_def] :Literal commit | [token_def] :Token commit | [ic_def] :IgnoreCollector commit | [ignore_def] :Ignore commit | [cfl_def] :CflDef commit | [cfl_redef] :CflRedef commit | [region_def] :Region commit | [struct_def] :Struct commit | [namespace_def] :Namespace commit | [function_def] :Function commit | [in_host_def] :InHost commit | [iter_def] :Iter commit | [statement] :Statement commit | [global_def] :Global commit | [export_def] :Export commit | [pre_eof_def] :PreEof commit | [precedence_def] :Precedence commit | [alias_def] :Alias commit | [_include] :Include commit | [reduction_def] :Reduction commit def _include [INCLUDE SQ SqConsDataList: sq_cons_data<* sq_lit_term] def precedence_def [pred_type pred_token_list] def pred_type [LEFT] :Left | [RIGHT] :Right | [NONASSOC] :NonAssoc def pred_token_list [pred_token_list COMMA pred_token] :List | [pred_token] :Base def pred_token [region_qual id] :Id | [region_qual backtick_lit] :Lit def pre_eof_def [PREEOF COPEN lang_stmt_list CCLOSE] def alias_def [ALIAS id type_ref] def struct_item [struct_var_def] :StructVar commit | [literal_def] :Literal commit | [rl_def] :Rl commit | [token_def] :Token commit | [ic_def] :IgnoreCollector commit | [ignore_def] :Ignore commit | [cfl_def] :Cfl commit | [region_def] :Region commit | [struct_def] :Struct commit | [function_def] :Function commit | [in_host_def] :InHost commit | [iter_def] :Iter commit | [export_def] :Export commit | [pre_eof_def] :PreEof commit | [precedence_def] :Precedence commit | [alias_def] :Alias commit def export_def [EXPORT var_def opt_def_init] def global_def [GLOBAL var_def opt_def_init] def iter_def [ITER id POPEN ParamVarDefList: param_var_def_list PCLOSE COPEN lang_stmt_list CCLOSE] def reference_type_ref [REF LT type_ref GT] def param_var_def_seq [param_var_def COMMA param_var_def_seq] | [param_var_def] def param_var_def_list [param_var_def_seq] | [] def param_var_def [id COLON type_ref] :Type | [id COLON reference_type_ref] :Ref def opt_export [EXPORT] :Export | [] def function_def [opt_export type_ref id POPEN ParamVarDefList: param_var_def_list PCLOSE COPEN lang_stmt_list CCLOSE] def in_host_def [opt_export type_ref id POPEN ParamVarDefList: param_var_def_list PCLOSE EQUALS HostFunc: id] def struct_var_def [var_def] def struct_key [STRUCT] | [CONTEXT] def struct_def [struct_key id ItemList: struct_item<* END] def literal_keyword [LITERAL] | [TOKEN] def literal_def [literal_keyword literal_list] def literal_list [literal_list literal_item] :Item | [literal_item] :Base def literal_item [no_ignore_left backtick_lit no_ignore_right] def no_ignore_left [NI MINUS] :Ni | [] def no_ignore_right [MINUS NI] :Ni | [] def reduction_def [REDUCTION id ItemList: reduction_item<* END] lex token RED_OPEN / '{' / token RED_CLOSE / '}' / token red_id / ( 'a' .. 'z' | 'A' .. 'Z' | '_' ) . ( 'a' .. 'z' | 'A' .. 'Z' | '0' .. '9' | '_' )* / token red_comment / '//' . ( ^'\n' )* . '\n' | '/*' . any* :> '*/' / token red_ws / ( '\n' | '\t' | ' ' )+ / token red_lit / '\'' . ( ^( '\'' | '\\' ) | '\\' . any )* . ( '\'' | '\'i' ) | '\"' . ( ^( '\"' | '\\' ) | '\\' . any )* . ( '\"' | '\"i' ) / token RED_LHS / '$' . '$' / token RED_RHS_REF / '$' . red_id / token RED_RHS_LOC / '@' . red_id / token RED_TREE_REF / '$*' . red_id / token RED_RHS_NREF / '$' . ('1' .. '9') . ('0' .. '9')* / token RED_RHS_NLOC / '@' . ('1' .. '9') . ('0' .. '9')* / token RED_TREE_NREF / '$*' . ('1' .. '9') . ('0' .. '9')* / token red_any / any / end def red_nonterm [type_ref RED_OPEN HostItems: host_item<* RED_CLOSE] def red_action [type_ref COLON id RED_OPEN HostItems: host_item<* RED_CLOSE] def host_item [red_id] | [red_lit] | [red_comment] | [red_ws] | [red_any] | [RED_LHS] | [RED_RHS_REF] | [RED_TREE_REF] | [RED_RHS_LOC] | [RED_RHS_NREF] | [RED_TREE_NREF] | [RED_RHS_NLOC] | [RED_OPEN HostItems: host_item<* RED_CLOSE] def reduction_item [red_nonterm] :NonTerm commit | [red_action] :Action commit def namespace_def [NAMESPACE id ItemList: namespace_item<* END] def namespace_item [rl_def] :Rl commit | [literal_def] :Literal commit | [token_def] :Token commit | [ic_def] :IgnoreCollector commit | [ignore_def] :Ignore commit | [cfl_def] :Cfl commit | [region_def] :Region commit | [struct_def] :Struct commit | [namespace_def] :Namespace commit | [function_def] :Function commit | [in_host_def] :InHost commit | [iter_def] :Iter commit | [pre_eof_def] :PreEof commit | [precedence_def] :Precedence commit | [alias_def] :Alias commit | [_include] :Include commit | [global_def] :Global commit def obj_var_list [] def opt_reduce_first [REDUCEFIRST] | [] def cfl_def [DEF id VarDefList: var_def<* opt_reduce_first prod_list] def cfl_redef [REDEF id VarDefList: var_def<* opt_reduce_first prod_list] def region_def [LEX RootItemList: root_item<* END] def rl_def [RL id LEX_FSLASH lex_expr LEX_FSLASH] def opt_lex_expr [lex_expr] | [] def token_def [TOKEN id VarDefList: var_def<* no_ignore_left LEX_FSLASH opt_lex_expr LEX_FSLASH no_ignore_right opt_translate] def ic_def [TOKEN id MINUS] def opt_translate [COPEN lang_stmt_list CCLOSE] :Translate | [] def opt_id [id] :Id | [] def ignore_def [IGNORE opt_id LEX_FSLASH opt_lex_expr LEX_FSLASH] def prod_sublist [prod_sublist BAR prod_el_list] | [prod_el_list] def prod_el [opt_prod_el_name region_qual id opt_repeat] :Id | [opt_prod_el_name region_qual backtick_lit opt_repeat] :Lit | [opt_prod_el_name POPEN prod_sublist PCLOSE opt_repeat ] :SubList def opt_prod_el_name [id COLON] :Name | [] def prod_el_list [prod_el_list prod_el] :List | [] def opt_commit [COMMIT] :Commit | [] def opt_prod_name [COLON id] :Name | [] def prod [SQOPEN prod_el_list SQCLOSE opt_prod_name opt_commit opt_reduce] :Prod | [SQOPEN DOT_DOT_DOT SQCLOSE] :DotDotDot def opt_reduce [COPEN lang_stmt_list CCLOSE] :Reduce | [] def prod_list [prod_list BAR prod] :List | [prod] :Base def case_clause [CASE pattern block_or_single] :Pattern commit | [CASE id block_or_single] :Id commit | [CASE id pattern block_or_single] :IdPat commit def default_clause [DEFAULT block_or_single] commit def case_clause_list [case_clause case_clause_list] :Recursive | [case_clause] :BaseCase | [default_clause] :BaseDefault # Note a commit on switch doesn't work because the default clause in # case_clause follow sets cause a premature commit. We could use a proper list # for case clauses, followed by an optional default, but just move the commits # to the clauses, which is is a better commit strategy anyways. Gives more # regular commits. def bare_tok [LT_LT] | [LARROW] def statement [print_stmt] :Print commit | [var_def opt_def_init] :VarDef commit | [FOR id COLON type_ref IN iter_call block_or_single] :For commit | [IF code_expr block_or_single elsif_list] :If commit | [SWITCH var_ref case_clause_list] :SwitchUnder | [SWITCH var_ref COPEN case_clause_list CCLOSE] :SwitchBlock | [WHILE code_expr block_or_single] :While commit | [var_ref EQUALS code_expr] :LhsVarRef commit | [YIELD var_ref] :Yield commit | [RETURN code_expr] :Return commit | [BREAK] :Break commit | [REJECT] :Reject commit | [var_ref POPEN call_arg_list PCLOSE] :Call | [stmt_or_factor] :StmtOrFactor | [bare_tok accumulate opt_eos] :BareSend def elsif_list [elsif_clause elsif_list] :Clause | [optional_else] :OptElse def elsif_clause [ELSIF code_expr block_or_single] def optional_else [ELSE block_or_single] :Else | [] def call_arg_seq [code_expr COMMA call_arg_seq] | [code_expr] def call_arg_list [call_arg_seq] | [] def iter_call [E1 var_ref POPEN call_arg_list PCLOSE] :Call | [E2 id] :Id | [E3 code_expr] :Expr def block_or_single [COPEN lang_stmt_list CCLOSE] :Block | [statement] :Single def require_pattern [REQUIRE var_ref pattern] def opt_require_stmt [require_pattern lang_stmt_list] :Require | [] :Base def lang_stmt_list [StmtList: statement<* opt_require_stmt] def opt_def_init [EQUALS code_expr] :Init | [] :Base def var_def [id COLON type_ref] def print_stmt [PRINT POPEN call_arg_list PCLOSE] :Tree | [PRINTS POPEN var_ref COMMA call_arg_list PCLOSE] :PrintStream | [PRINT accumulate] :Accum def expr_stmt [code_expr] def code_expr [code_expr AMP_AMP code_relational] :AmpAmp | [code_expr BAR_BAR code_relational] :BarBar | [code_relational] :Base def code_relational [code_relational EQ_EQ code_additive] :EqEq | [code_relational BANG_EQ code_additive] :Neq | [code_relational LT code_additive] :Lt | [code_relational GT code_additive] :Gt | [code_relational LT_EQ code_additive] :LtEq | [code_relational GT_EQ code_additive] :GtEq | [code_additive] :Base def code_additive [code_additive PLUS code_multiplicitive] :Plus | [code_additive MINUS code_multiplicitive] :Minus | [code_multiplicitive] :Base def code_multiplicitive [code_multiplicitive STAR code_unary] :Star | [code_multiplicitive FSLASH code_unary] :Fslash | [code_unary] :Base def code_unary [BANG code_factor] :Bang | [DOLLAR code_factor] :Dollar | [DOLLAR DOLLAR code_factor] :DollarDollar | [CARET code_factor] :Caret | [AT code_factor] :At | [PERCENT code_factor] :Percent | [code_factor] :Base def opt_eos [DOT] :Dot | [EOS] :Eos | [] def code_factor [number] :Number | [var_ref POPEN call_arg_list PCLOSE] :Call | [var_ref] :VarRef | [NIL] :Nil | [TRUE] :True | [FALSE] :False | [POPEN code_expr PCLOSE] :Paren | [string] :String | [type_ref IN var_ref] :In | [TYPEID LT type_ref GT] :TypeId | [CAST LT type_ref GT code_factor] :Cast | [stmt_or_factor] :StmtOrFactor def type_ref [region_qual id opt_repeat] :Id | [INT] :Int | [BOOL] :Bool | [VOID] :Void | [PARSER LT type_ref GT] :Parser | [LIST LT type_ref GT] :List | [MAP LT KeyType: type_ref COMMA ValType: type_ref GT] :Map | [LIST_EL LT type_ref GT] :ListEl | [MAP_EL LT KeyType: type_ref COMMA ValType: type_ref GT] :MapEl def region_qual [region_qual id DOUBLE_COLON] :Qual | [] :Base def opt_repeat [STAR] :Star | [PLUS] :Plus | [QUESTION] :Question | [LT STAR] :LeftStar | [LT PLUS] :LeftPlus | [] def opt_capture [id COLON] :Id | [] def opt_field_init [POPEN FieldInitList: field_init<* PCLOSE] :Init | [] :Base def field_init [code_expr] def stmt_or_factor [PARSE opt_capture type_ref opt_field_init accumulate] :Parse | [PARSE_TREE opt_capture type_ref opt_field_init accumulate] :ParseTree | [PARSE_STOP opt_capture type_ref opt_field_init accumulate] :ParseStop | [REDUCE id type_ref opt_field_init accumulate] :Reduce | [READ_REDUCE id type_ref opt_field_init accumulate] :ReadReduce | [SEND var_ref accumulate opt_eos] :Send | [SEND_TREE var_ref accumulate opt_eos] :SendTree | [MAKE_TREE POPEN call_arg_list PCLOSE] :MakeTree | [MAKE_TOKEN POPEN call_arg_list PCLOSE] :MakeToken | [CONS opt_capture type_ref opt_field_init constructor] :Cons | [MATCH var_ref pattern] :Match | [NEW opt_capture type_ref POPEN FieldInitList: field_init<* PCLOSE] :New # # Pattern # def opt_label [id COLON] :Id | [] def dq_lit_term [LIT_DQ] | [LIT_DQ_NL] def sq_lit_term [CONS_SQ] | [CONS_SQ_NL] def opt_tilde_data [tilde_data] | [] def pattern_el_lel [region_qual id opt_repeat] :Id | [region_qual backtick_lit opt_repeat] :Lit def pattern_el [opt_label pattern_el_lel] :PatternEl | [DQ LitpatElList: litpat_el<* dq_lit_term] :Dq | [SQ SqConsDataList: sq_cons_data<* sq_lit_term] :Sq | [TILDE opt_tilde_data TILDE_NL] :Tilde def litpat_el [lit_dq_data] :ConsData | [LIT_SQOPEN PatternElList: pattern_el<* LIT_SQCLOSE] :SubList def pattern_top_el [DQ LitpatElList: litpat_el<* dq_lit_term] :Dq | [SQ SqConsDataList: sq_cons_data<* sq_lit_term] :Sq | [TILDE opt_tilde_data TILDE_NL] :Tilde def pattern_list [pattern_top_el pattern_list] :List | [pattern_top_el] :Base def pattern [pattern_list] :TopList | [SQOPEN PatternElList: pattern_el<* SQCLOSE] :SubList # # Constructor List # def E1 [] def E2 [] def E3 [] def E4 [] def cons_el [E1 region_qual backtick_lit] :Lit | [E1 DQ LitConsElList: lit_cons_el<* dq_lit_term] :Dq | [E1 SQ SqConsDataList: sq_cons_data<* sq_lit_term] :Sq | [E1 TILDE opt_tilde_data TILDE_NL] :Tilde | [E2 code_expr] :CodeExpr def lit_cons_el [lit_dq_data] :ConsData | [LIT_SQOPEN ConsElList: cons_el<* LIT_SQCLOSE] :SubList def cons_top_el [DQ LitConsElList: lit_cons_el<* dq_lit_term] :Dq | [SQ SqConsDataList: sq_cons_data<* sq_lit_term] :Sq | [TILDE opt_tilde_data TILDE_NL] :Tilde def cons_list [cons_top_el cons_list] :List | [cons_top_el] :Base def constructor [cons_list] :TopList | [SQOPEN ConsElList: cons_el<* SQCLOSE] :SubList # # Accumulate # def accum_el [E1 DQ LitAccumElList: lit_accum_el<* dq_lit_term] :Dq | [E1 SQ SqConsDataList: sq_cons_data<* sq_lit_term] :Sq | [E1 TILDE opt_tilde_data TILDE_NL] :Tilde | [E2 code_expr] :CodeExpr def lit_accum_el [lit_dq_data] :ConsData | [LIT_SQOPEN AccumElList: accum_el<* LIT_SQCLOSE] :SubList def accum_top_el [DQ LitAccumElList: lit_accum_el<* dq_lit_term] :Dq | [SQ SqConsDataList: sq_cons_data<* sq_lit_term] :Sq | [TILDE opt_tilde_data TILDE_NL] :Tilde | [SQOPEN AccumElList: accum_el<* SQCLOSE] :SubList def accum_list [accum_top_el accum_list] :List | [accum_top_el] :Base def accumulate [accum_list] # # String List # def string_el [E1 DQ LitStringElList: lit_string_el<* dq_lit_term] :Dq | [E1 SQ SqConsDataList: sq_cons_data<* sq_lit_term] :Sq | [E1 TILDE opt_tilde_data TILDE_NL] :Tilde | [E2 code_expr] :CodeExpr def lit_string_el [lit_dq_data] :ConsData | [LIT_SQOPEN StringElList: string_el<* LIT_SQCLOSE] :SubList def string_top_el [DQ LitStringElList: lit_string_el<* dq_lit_term] :Dq | [SQ SqConsDataList: sq_cons_data<* sq_lit_term] :Sq | [TILDE opt_tilde_data TILDE_NL] :Tilde def string_list [string_top_el string_list] :List | [string_top_el] :Base def string [string_list] :TopList | [SQOPEN StringElList: string_el<* SQCLOSE] :SubList # # Variable References # def var_ref [region_qual qual id] def qual [qual id DOT] :Dot | [qual id ARROW] :Arrow | [] :Base # # Lexical analysis. # def lex_expr [lex_expr LEX_BAR lex_term] :Bar | [lex_expr LEX_AMP lex_term] :Amp | [lex_expr LEX_DASH lex_term] :Dash | [lex_expr LEX_DASHDASH lex_term] :DashDash | [lex_term] :Base def opt_lex_dot [LEX_DOT] | [] def lex_term [lex_term opt_lex_dot lex_factor_rep] :Dot | [lex_term LEX_COLON_GT lex_factor_rep] :ColonGt | [lex_term LEX_COLON_GTGT lex_factor_rep] :ColonGtGt | [lex_term LEX_LT_COLON lex_factor_rep] :LtColon | [lex_factor_rep] :Base def lex_factor_rep [lex_factor_rep LEX_STAR] :Star | [lex_factor_rep LEX_STARSTAR] :StarStar | [lex_factor_rep LEX_PLUS] :Plus | [lex_factor_rep LEX_QUESTION] :Question | [lex_factor_rep COPEN lex_uint CCLOSE ] :Exact | [lex_factor_rep COPEN COMMA lex_uint CCLOSE ] :Max | [lex_factor_rep COPEN lex_uint COMMA CCLOSE ] :Min | [lex_factor_rep COPEN Low: lex_uint COMMA High: lex_uint CCLOSE ] :Range | [lex_factor_neg] :Base def lex_factor_neg [LEX_CARET lex_factor_neg] :Caret | [lex_factor] :Base def lex_range_lit [lex_lit] :Lit | [lex_num] :Number def lex_num [lex_uint] | [lex_hex] #| [LEX_DASH num] def lex_factor [lex_lit] :Literal | [lex_id] :Id | [lex_uint] :Number | [lex_hex] :Hex | [Low: lex_range_lit LEX_DOTDOT High: lex_range_lit] :Range | [LEX_SQOPEN_POS reg_or_data RE_SQCLOSE] :PosOrBlock | [LEX_SQOPEN_NEG reg_or_data RE_SQCLOSE] :NegOrBlock | [LEX_POPEN lex_expr LEX_PCLOSE] :Paren def reg_or_data [reg_or_data reg_or_char] :Data | [] :Base def reg_or_char [RE_CHAR] :Char | [Low: RE_CHAR RE_DASH High: RE_CHAR] :Range