Open mingodad opened 1 year ago
Using some online tools like https://www.bottlecaps.de/rr/ui and https://www.bottlecaps.de/convert/ we can have a nice navigable railroad diagram.
Copy and paste the EBNF shown bellow on https://www.bottlecaps.de/rr/ui on the tab Edit Grammar the click on the tab View Diagram to see/download a navigable railroad diagram.
EBNF
Edit Grammar
View Diagram
crate ::= maybe_shebang inner_attrs maybe_mod_items | maybe_shebang maybe_mod_items maybe_shebang ::= SHEBANG_LINE | /*empty*/ maybe_inner_attrs ::= inner_attrs | /*empty*/ inner_attrs ::= inner_attr | inner_attrs inner_attr inner_attr ::= SHEBANG '[' meta_item ']' | INNER_DOC_COMMENT maybe_outer_attrs ::= outer_attrs | /*empty*/ outer_attrs ::= outer_attr | outer_attrs outer_attr outer_attr ::= '#' '[' meta_item ']' | OUTER_DOC_COMMENT meta_item ::= ident | ident '=' lit | ident '(' meta_seq ')' | ident '(' meta_seq ',' ')' meta_seq ::= /*empty*/ | meta_item | meta_seq ',' meta_item maybe_mod_items ::= mod_items | /*empty*/ mod_items ::= mod_item | mod_items mod_item attrs_and_vis ::= maybe_outer_attrs visibility mod_item ::= attrs_and_vis item item ::= stmt_item | item_macro stmt_item ::= item_static | item_const | item_type | block_item | view_item item_static ::= STATIC ident ':' ty '=' expr ';' | STATIC MUT ident ':' ty '=' expr ';' item_const ::= CONST ident ':' ty '=' expr ';' item_macro ::= path_expr '!' maybe_ident parens_delimited_token_trees ';' | path_expr '!' maybe_ident braces_delimited_token_trees | path_expr '!' maybe_ident brackets_delimited_token_trees ';' view_item ::= use_item | extern_fn_item | EXTERN CRATE ident ';' | EXTERN CRATE ident AS ident ';' extern_fn_item ::= EXTERN maybe_abi item_fn use_item ::= USE view_path ';' view_path ::= path_no_types_allowed | path_no_types_allowed MOD_SEP '{' '}' | MOD_SEP '{' '}' | path_no_types_allowed MOD_SEP '{' idents_or_self '}' | MOD_SEP '{' idents_or_self '}' | path_no_types_allowed MOD_SEP '{' idents_or_self ',' '}' | MOD_SEP '{' idents_or_self ',' '}' | path_no_types_allowed MOD_SEP '*' | MOD_SEP '*' | '*' | '{' '}' | '{' idents_or_self '}' | '{' idents_or_self ',' '}' | path_no_types_allowed AS ident block_item ::= item_fn | item_unsafe_fn | item_mod | item_foreign_mod | item_struct | item_enum | item_union | item_trait | item_impl maybe_ty_ascription ::= ':' ty_sum | /*empty*/ maybe_init_expr ::= '=' expr | /*empty*/ item_struct ::= STRUCT ident generic_params maybe_where_clause struct_decl_args | STRUCT ident generic_params struct_tuple_args maybe_where_clause ';' | STRUCT ident generic_params maybe_where_clause ';' struct_decl_args ::= '{' struct_decl_fields '}' | '{' struct_decl_fields ',' '}' struct_tuple_args ::= '(' struct_tuple_fields ')' | '(' struct_tuple_fields ',' ')' struct_decl_fields ::= struct_decl_field | struct_decl_fields ',' struct_decl_field | /*empty*/ struct_decl_field ::= attrs_and_vis ident ':' ty_sum struct_tuple_fields ::= struct_tuple_field | struct_tuple_fields ',' struct_tuple_field | /*empty*/ struct_tuple_field ::= attrs_and_vis ty_sum item_enum ::= ENUM ident generic_params maybe_where_clause '{' enum_defs '}' | ENUM ident generic_params maybe_where_clause '{' enum_defs ',' '}' enum_defs ::= enum_def | enum_defs ',' enum_def | /*empty*/ enum_def ::= attrs_and_vis ident enum_args enum_args ::= '{' struct_decl_fields '}' | '{' struct_decl_fields ',' '}' | '(' maybe_ty_sums ')' | '=' expr | /*empty*/ item_union ::= UNION ident generic_params maybe_where_clause '{' struct_decl_fields '}' | UNION ident generic_params maybe_where_clause '{' struct_decl_fields ',' '}' item_mod ::= MOD ident ';' | MOD ident '{' maybe_mod_items '}' | MOD ident '{' inner_attrs maybe_mod_items '}' item_foreign_mod ::= EXTERN maybe_abi '{' maybe_foreign_items '}' | EXTERN maybe_abi '{' inner_attrs maybe_foreign_items '}' maybe_abi ::= str | /*empty*/ maybe_foreign_items ::= foreign_items | /*empty*/ foreign_items ::= foreign_item | foreign_items foreign_item foreign_item ::= attrs_and_vis STATIC item_foreign_static | attrs_and_vis item_foreign_fn | attrs_and_vis UNSAFE item_foreign_fn item_foreign_static ::= maybe_mut ident ':' ty ';' item_foreign_fn ::= FN ident generic_params fn_decl_allow_variadic maybe_where_clause ';' fn_decl_allow_variadic ::= fn_params_allow_variadic ret_ty fn_params_allow_variadic ::= '(' ')' | '(' params ')' | '(' params ',' ')' | '(' params ',' DOTDOTDOT ')' visibility ::= PUB | /*empty*/ idents_or_self ::= ident_or_self | idents_or_self AS ident | idents_or_self ',' ident_or_self ident_or_self ::= ident | SELF item_type ::= TYPE ident generic_params maybe_where_clause '=' ty_sum ';' for_sized ::= FOR '?' ident | FOR ident '?' | /*empty*/ item_trait ::= maybe_unsafe TRAIT ident generic_params for_sized maybe_ty_param_bounds maybe_where_clause '{' maybe_trait_items '}' maybe_trait_items ::= trait_items | /*empty*/ trait_items ::= trait_item | trait_items trait_item trait_item ::= trait_const | trait_type | trait_method | maybe_outer_attrs item_macro trait_const ::= maybe_outer_attrs CONST ident maybe_ty_ascription maybe_const_default ';' maybe_const_default ::= '=' expr | /*empty*/ trait_type ::= maybe_outer_attrs TYPE ty_param ';' maybe_unsafe ::= UNSAFE | /*empty*/ maybe_default_maybe_unsafe ::= DEFAULT UNSAFE | DEFAULT | UNSAFE | /*empty*/ trait_method ::= type_method | method type_method ::= maybe_outer_attrs maybe_unsafe FN ident generic_params fn_decl_with_self_allow_anon_params maybe_where_clause ';' | maybe_outer_attrs CONST maybe_unsafe FN ident generic_params fn_decl_with_self_allow_anon_params maybe_where_clause ';' | maybe_outer_attrs maybe_unsafe EXTERN maybe_abi FN ident generic_params fn_decl_with_self_allow_anon_params maybe_where_clause ';' method ::= maybe_outer_attrs maybe_unsafe FN ident generic_params fn_decl_with_self_allow_anon_params maybe_where_clause inner_attrs_and_block | maybe_outer_attrs CONST maybe_unsafe FN ident generic_params fn_decl_with_self_allow_anon_params maybe_where_clause inner_attrs_and_block | maybe_outer_attrs maybe_unsafe EXTERN maybe_abi FN ident generic_params fn_decl_with_self_allow_anon_params maybe_where_clause inner_attrs_and_block impl_method ::= attrs_and_vis maybe_default maybe_unsafe FN ident generic_params fn_decl_with_self maybe_where_clause inner_attrs_and_block | attrs_and_vis maybe_default CONST maybe_unsafe FN ident generic_params fn_decl_with_self maybe_where_clause inner_attrs_and_block | attrs_and_vis maybe_default maybe_unsafe EXTERN maybe_abi FN ident generic_params fn_decl_with_self maybe_where_clause inner_attrs_and_block item_impl ::= maybe_default_maybe_unsafe IMPL generic_params ty_prim_sum maybe_where_clause '{' maybe_inner_attrs maybe_impl_items '}' | maybe_default_maybe_unsafe IMPL generic_params '(' ty ')' maybe_where_clause '{' maybe_inner_attrs maybe_impl_items '}' | maybe_default_maybe_unsafe IMPL generic_params trait_ref FOR ty_sum maybe_where_clause '{' maybe_inner_attrs maybe_impl_items '}' | maybe_default_maybe_unsafe IMPL generic_params '!' trait_ref FOR ty_sum maybe_where_clause '{' maybe_inner_attrs maybe_impl_items '}' | maybe_default_maybe_unsafe IMPL generic_params trait_ref FOR DOTDOT '{' '}' | maybe_default_maybe_unsafe IMPL generic_params '!' trait_ref FOR DOTDOT '{' '}' maybe_impl_items ::= impl_items | /*empty*/ impl_items ::= impl_item | impl_item impl_items impl_item ::= impl_method | attrs_and_vis item_macro | impl_const | impl_type maybe_default ::= DEFAULT | /*empty*/ impl_const ::= attrs_and_vis maybe_default item_const impl_type ::= attrs_and_vis maybe_default TYPE ident generic_params '=' ty_sum ';' item_fn ::= FN ident generic_params fn_decl maybe_where_clause inner_attrs_and_block | CONST FN ident generic_params fn_decl maybe_where_clause inner_attrs_and_block item_unsafe_fn ::= UNSAFE FN ident generic_params fn_decl maybe_where_clause inner_attrs_and_block | CONST UNSAFE FN ident generic_params fn_decl maybe_where_clause inner_attrs_and_block | UNSAFE EXTERN maybe_abi FN ident generic_params fn_decl maybe_where_clause inner_attrs_and_block fn_decl ::= fn_params ret_ty fn_decl_with_self ::= fn_params_with_self ret_ty fn_decl_with_self_allow_anon_params ::= fn_anon_params_with_self ret_ty fn_params ::= '(' maybe_params ')' fn_anon_params ::= '(' anon_param anon_params_allow_variadic_tail ')' | '(' ')' fn_params_with_self ::= '(' maybe_mut SELF maybe_ty_ascription maybe_comma_params ')' | '(' '&' maybe_mut SELF maybe_ty_ascription maybe_comma_params ')' | '(' '&' lifetime maybe_mut SELF maybe_ty_ascription maybe_comma_params ')' | '(' maybe_params ')' fn_anon_params_with_self ::= '(' maybe_mut SELF maybe_ty_ascription maybe_comma_anon_params ')' | '(' '&' maybe_mut SELF maybe_ty_ascription maybe_comma_anon_params ')' | '(' '&' lifetime maybe_mut SELF maybe_ty_ascription maybe_comma_anon_params ')' | '(' maybe_anon_params ')' maybe_params ::= params | params ',' | /*empty*/ params ::= param | params ',' param param ::= pat ':' ty_sum inferrable_params ::= inferrable_param | inferrable_params ',' inferrable_param inferrable_param ::= pat maybe_ty_ascription maybe_comma_params ::= ',' | ',' params | ',' params ',' | /*empty*/ maybe_comma_anon_params ::= ',' | ',' anon_params | ',' anon_params ',' | /*empty*/ maybe_anon_params ::= anon_params | anon_params ',' | /*empty*/ anon_params ::= anon_param | anon_params ',' anon_param anon_param ::= named_arg ':' ty | ty anon_params_allow_variadic_tail ::= ',' DOTDOTDOT | ',' anon_param anon_params_allow_variadic_tail | /*empty*/ named_arg ::= ident | UNDERSCORE | '&' ident | '&' UNDERSCORE | ANDAND ident | ANDAND UNDERSCORE | MUT ident ret_ty ::= RARROW '!' | RARROW ty | /*empty*/ generic_params ::= '<' '>' | '<' lifetimes '>' | '<' lifetimes ',' '>' | '<' lifetimes SHR | '<' lifetimes ',' SHR | '<' lifetimes ',' ty_params '>' | '<' lifetimes ',' ty_params ',' '>' | '<' lifetimes ',' ty_params SHR | '<' lifetimes ',' ty_params ',' SHR | '<' ty_params '>' | '<' ty_params ',' '>' | '<' ty_params SHR | '<' ty_params ',' SHR | /*empty*/ maybe_where_clause ::= /*empty*/ | where_clause where_clause ::= WHERE where_predicates | WHERE where_predicates ',' where_predicates ::= where_predicate | where_predicates ',' where_predicate where_predicate ::= maybe_for_lifetimes lifetime ':' bounds | maybe_for_lifetimes ty ':' ty_param_bounds maybe_for_lifetimes ::= FOR '<' lifetimes '>' | /*empty*/ ty_params ::= ty_param | ty_params ',' ty_param path_no_types_allowed ::= ident | MOD_SEP ident | SELF | MOD_SEP SELF | SUPER | MOD_SEP SUPER | path_no_types_allowed MOD_SEP ident path_generic_args_without_colons ::= ident | ident generic_args | ident '(' maybe_ty_sums ')' ret_ty | path_generic_args_without_colons MOD_SEP ident | path_generic_args_without_colons MOD_SEP ident generic_args | path_generic_args_without_colons MOD_SEP ident '(' maybe_ty_sums ')' ret_ty generic_args ::= '<' generic_values '>' | '<' generic_values SHR | '<' generic_values GE | '<' generic_values SHREQ | SHL ty_qualified_path_and_generic_values '>' | SHL ty_qualified_path_and_generic_values SHR | SHL ty_qualified_path_and_generic_values GE | SHL ty_qualified_path_and_generic_values SHREQ generic_values ::= maybe_ty_sums_and_or_bindings maybe_ty_sums_and_or_bindings ::= ty_sums | ty_sums ',' | ty_sums ',' bindings | bindings | bindings ',' | /*empty*/ maybe_bindings ::= ',' bindings | /*empty*/ pat ::= UNDERSCORE | '&' pat | '&' MUT pat | ANDAND pat | '(' ')' | '(' pat_tup ')' | '[' pat_vec ']' | lit_or_path | lit_or_path DOTDOTDOT lit_or_path | path_expr '{' pat_struct '}' | path_expr '(' ')' | path_expr '(' pat_tup ')' | path_expr '!' maybe_ident delimited_token_trees | binding_mode ident | ident '@' pat | binding_mode ident '@' pat | BOX pat | '<' ty_sum maybe_as_trait_ref '>' MOD_SEP ident | SHL ty_sum maybe_as_trait_ref '>' MOD_SEP ident maybe_as_trait_ref '>' MOD_SEP ident pats_or ::= pat | pats_or '|' pat binding_mode ::= REF | REF MUT | MUT lit_or_path ::= path_expr | lit | '-' lit pat_field ::= ident | binding_mode ident | BOX ident | BOX binding_mode ident | ident ':' pat | binding_mode ident ':' pat | LIT_INTEGER ':' pat pat_fields ::= pat_field | pat_fields ',' pat_field pat_struct ::= pat_fields | pat_fields ',' | pat_fields ',' DOTDOT | DOTDOT | /*empty*/ pat_tup ::= pat_tup_elts | pat_tup_elts ',' | pat_tup_elts DOTDOT | pat_tup_elts ',' DOTDOT | pat_tup_elts DOTDOT ',' pat_tup_elts | pat_tup_elts DOTDOT ',' pat_tup_elts ',' | pat_tup_elts ',' DOTDOT ',' pat_tup_elts | pat_tup_elts ',' DOTDOT ',' pat_tup_elts ',' | DOTDOT ',' pat_tup_elts | DOTDOT ',' pat_tup_elts ',' | DOTDOT pat_tup_elts ::= pat | pat_tup_elts ',' pat pat_vec ::= pat_vec_elts | pat_vec_elts ',' | pat_vec_elts DOTDOT | pat_vec_elts ',' DOTDOT | pat_vec_elts DOTDOT ',' pat_vec_elts | pat_vec_elts DOTDOT ',' pat_vec_elts ',' | pat_vec_elts ',' DOTDOT ',' pat_vec_elts | pat_vec_elts ',' DOTDOT ',' pat_vec_elts ',' | DOTDOT ',' pat_vec_elts | DOTDOT ',' pat_vec_elts ',' | DOTDOT | /*empty*/ pat_vec_elts ::= pat | pat_vec_elts ',' pat ty ::= ty_prim | ty_closure | '<' ty_sum maybe_as_trait_ref '>' MOD_SEP ident | SHL ty_sum maybe_as_trait_ref '>' MOD_SEP ident maybe_as_trait_ref '>' MOD_SEP ident | '(' ty_sums ')' | '(' ty_sums ',' ')' | '(' ')' ty_prim ::= path_generic_args_without_colons | MOD_SEP path_generic_args_without_colons | SELF MOD_SEP path_generic_args_without_colons | path_generic_args_without_colons '!' maybe_ident delimited_token_trees | MOD_SEP path_generic_args_without_colons '!' maybe_ident delimited_token_trees | BOX ty | '*' maybe_mut_or_const ty | '&' ty | '&' MUT ty | ANDAND ty | ANDAND MUT ty | '&' lifetime maybe_mut ty | ANDAND lifetime maybe_mut ty | '[' ty ']' | '[' ty ',' DOTDOT expr ']' | '[' ty ';' expr ']' | TYPEOF '(' expr ')' | UNDERSCORE | ty_bare_fn | for_in_type ty_bare_fn ::= FN ty_fn_decl | UNSAFE FN ty_fn_decl | EXTERN maybe_abi FN ty_fn_decl | UNSAFE EXTERN maybe_abi FN ty_fn_decl ty_fn_decl ::= generic_params fn_anon_params ret_ty ty_closure ::= UNSAFE '|' anon_params '|' maybe_bounds ret_ty | '|' anon_params '|' maybe_bounds ret_ty | UNSAFE OROR maybe_bounds ret_ty | OROR maybe_bounds ret_ty for_in_type ::= FOR '<' maybe_lifetimes '>' for_in_type_suffix for_in_type_suffix ::= ty_bare_fn | trait_ref | ty_closure maybe_mut ::= MUT | /*empty*/ maybe_mut_or_const ::= MUT | CONST | /*empty*/ ty_qualified_path_and_generic_values ::= ty_qualified_path maybe_bindings | ty_qualified_path ',' ty_sums maybe_bindings ty_qualified_path ::= ty_sum AS trait_ref '>' MOD_SEP ident | ty_sum AS trait_ref '>' MOD_SEP ident '+' ty_param_bounds maybe_ty_sums ::= ty_sums | ty_sums ',' | /*empty*/ ty_sums ::= ty_sum | ty_sums ',' ty_sum ty_sum ::= ty_sum_elt | ty_sum '+' ty_sum_elt ty_sum_elt ::= ty | lifetime ty_prim_sum ::= ty_prim_sum_elt | ty_prim_sum '+' ty_prim_sum_elt ty_prim_sum_elt ::= ty_prim | lifetime maybe_ty_param_bounds ::= ':' ty_param_bounds | /*empty*/ ty_param_bounds ::= boundseq | /*empty*/ boundseq ::= polybound | boundseq '+' polybound polybound ::= FOR '<' maybe_lifetimes '>' bound | bound | '?' FOR '<' maybe_lifetimes '>' bound | '?' bound bindings ::= binding | bindings ',' binding binding ::= ident '=' ty ty_param ::= ident maybe_ty_param_bounds maybe_ty_default | ident '?' ident maybe_ty_param_bounds maybe_ty_default maybe_bounds ::= ':' bounds | /*empty*/ bounds ::= bound | bounds '+' bound bound ::= lifetime | trait_ref maybe_ltbounds ::= ':' ltbounds | /*empty*/ ltbounds ::= lifetime | ltbounds '+' lifetime maybe_ty_default ::= '=' ty_sum | /*empty*/ maybe_lifetimes ::= lifetimes | lifetimes ',' | /*empty*/ lifetimes ::= lifetime_and_bounds | lifetimes ',' lifetime_and_bounds lifetime_and_bounds ::= LIFETIME maybe_ltbounds | STATIC_LIFETIME lifetime ::= LIFETIME | STATIC_LIFETIME trait_ref ::= path_generic_args_without_colons | MOD_SEP path_generic_args_without_colons inner_attrs_and_block ::= '{' maybe_inner_attrs maybe_stmts '}' block ::= '{' maybe_stmts '}' maybe_stmts ::= stmts | stmts nonblock_expr | nonblock_expr | /*empty*/ stmts ::= stmt | stmts stmt stmt ::= maybe_outer_attrs let | stmt_item | PUB stmt_item | outer_attrs stmt_item | outer_attrs PUB stmt_item | full_block_expr | maybe_outer_attrs block | nonblock_expr ';' | outer_attrs nonblock_expr ';' | ';' maybe_exprs ::= exprs | exprs ',' | /*empty*/ maybe_expr ::= expr | /*empty*/ exprs ::= expr | exprs ',' expr path_expr ::= path_generic_args_with_colons | MOD_SEP path_generic_args_with_colons | SELF MOD_SEP path_generic_args_with_colons path_generic_args_with_colons ::= ident | SUPER | path_generic_args_with_colons MOD_SEP ident | path_generic_args_with_colons MOD_SEP SUPER | path_generic_args_with_colons MOD_SEP generic_args macro_expr ::= path_expr '!' maybe_ident parens_delimited_token_trees | path_expr '!' maybe_ident brackets_delimited_token_trees nonblock_expr ::= lit | path_expr | SELF | macro_expr | path_expr '{' struct_expr_fields '}' | nonblock_expr '?' | nonblock_expr '.' path_generic_args_with_colons | nonblock_expr '.' LIT_INTEGER | nonblock_expr '[' maybe_expr ']' | nonblock_expr '(' maybe_exprs ')' | '[' vec_expr ']' | '(' maybe_exprs ')' | CONTINUE | CONTINUE lifetime | RETURN | RETURN expr | BREAK | BREAK lifetime | YIELD | YIELD expr | nonblock_expr LARROW expr | nonblock_expr '=' expr | nonblock_expr SHLEQ expr | nonblock_expr SHREQ expr | nonblock_expr MINUSEQ expr | nonblock_expr ANDEQ expr | nonblock_expr OREQ expr | nonblock_expr PLUSEQ expr | nonblock_expr STAREQ expr | nonblock_expr SLASHEQ expr | nonblock_expr CARETEQ expr | nonblock_expr PERCENTEQ expr | nonblock_expr OROR expr | nonblock_expr ANDAND expr | nonblock_expr EQEQ expr | nonblock_expr NE expr | nonblock_expr '<' expr | nonblock_expr '>' expr | nonblock_expr LE expr | nonblock_expr GE expr | nonblock_expr '|' expr | nonblock_expr '^' expr | nonblock_expr '&' expr | nonblock_expr SHL expr | nonblock_expr SHR expr | nonblock_expr '+' expr | nonblock_expr '-' expr | nonblock_expr '*' expr | nonblock_expr '/' expr | nonblock_expr '%' expr | nonblock_expr DOTDOT | nonblock_expr DOTDOT expr | DOTDOT expr | DOTDOT | nonblock_expr AS ty | nonblock_expr ':' ty | BOX expr | expr_qualified_path | nonblock_prefix_expr expr ::= lit | path_expr | SELF | macro_expr | path_expr '{' struct_expr_fields '}' | expr '?' | expr '.' path_generic_args_with_colons | expr '.' LIT_INTEGER | expr '[' maybe_expr ']' | expr '(' maybe_exprs ')' | '(' maybe_exprs ')' | '[' vec_expr ']' | CONTINUE | CONTINUE ident | RETURN | RETURN expr | BREAK | BREAK ident | YIELD | YIELD expr | expr LARROW expr | expr '=' expr | expr SHLEQ expr | expr SHREQ expr | expr MINUSEQ expr | expr ANDEQ expr | expr OREQ expr | expr PLUSEQ expr | expr STAREQ expr | expr SLASHEQ expr | expr CARETEQ expr | expr PERCENTEQ expr | expr OROR expr | expr ANDAND expr | expr EQEQ expr | expr NE expr | expr '<' expr | expr '>' expr | expr LE expr | expr GE expr | expr '|' expr | expr '^' expr | expr '&' expr | expr SHL expr | expr SHR expr | expr '+' expr | expr '-' expr | expr '*' expr | expr '/' expr | expr '%' expr | expr DOTDOT | expr DOTDOT expr | DOTDOT expr | DOTDOT | expr AS ty | expr ':' ty | BOX expr | expr_qualified_path | block_expr | block | nonblock_prefix_expr expr_nostruct ::= lit | path_expr | SELF | macro_expr | expr_nostruct '?' | expr_nostruct '.' path_generic_args_with_colons | expr_nostruct '.' LIT_INTEGER | expr_nostruct '[' maybe_expr ']' | expr_nostruct '(' maybe_exprs ')' | '[' vec_expr ']' | '(' maybe_exprs ')' | CONTINUE | CONTINUE ident | RETURN | RETURN expr | BREAK | BREAK ident | YIELD | YIELD expr | expr_nostruct LARROW expr_nostruct | expr_nostruct '=' expr_nostruct | expr_nostruct SHLEQ expr_nostruct | expr_nostruct SHREQ expr_nostruct | expr_nostruct MINUSEQ expr_nostruct | expr_nostruct ANDEQ expr_nostruct | expr_nostruct OREQ expr_nostruct | expr_nostruct PLUSEQ expr_nostruct | expr_nostruct STAREQ expr_nostruct | expr_nostruct SLASHEQ expr_nostruct | expr_nostruct CARETEQ expr_nostruct | expr_nostruct PERCENTEQ expr_nostruct | expr_nostruct OROR expr_nostruct | expr_nostruct ANDAND expr_nostruct | expr_nostruct EQEQ expr_nostruct | expr_nostruct NE expr_nostruct | expr_nostruct '<' expr_nostruct | expr_nostruct '>' expr_nostruct | expr_nostruct LE expr_nostruct | expr_nostruct GE expr_nostruct | expr_nostruct '|' expr_nostruct | expr_nostruct '^' expr_nostruct | expr_nostruct '&' expr_nostruct | expr_nostruct SHL expr_nostruct | expr_nostruct SHR expr_nostruct | expr_nostruct '+' expr_nostruct | expr_nostruct '-' expr_nostruct | expr_nostruct '*' expr_nostruct | expr_nostruct '/' expr_nostruct | expr_nostruct '%' expr_nostruct | expr_nostruct DOTDOT | expr_nostruct DOTDOT expr_nostruct | DOTDOT expr_nostruct | DOTDOT | expr_nostruct AS ty | expr_nostruct ':' ty | BOX expr | expr_qualified_path | block_expr | block | nonblock_prefix_expr_nostruct nonblock_prefix_expr_nostruct ::= '-' expr_nostruct | '!' expr_nostruct | '*' expr_nostruct | '&' maybe_mut expr_nostruct | ANDAND maybe_mut expr_nostruct | lambda_expr_nostruct | MOVE lambda_expr_nostruct nonblock_prefix_expr ::= '-' expr | '!' expr | '*' expr | '&' maybe_mut expr | ANDAND maybe_mut expr | lambda_expr | MOVE lambda_expr expr_qualified_path ::= '<' ty_sum maybe_as_trait_ref '>' MOD_SEP ident maybe_qpath_params | SHL ty_sum maybe_as_trait_ref '>' MOD_SEP ident maybe_as_trait_ref '>' MOD_SEP ident | SHL ty_sum maybe_as_trait_ref '>' MOD_SEP ident generic_args maybe_as_trait_ref '>' MOD_SEP ident | SHL ty_sum maybe_as_trait_ref '>' MOD_SEP ident maybe_as_trait_ref '>' MOD_SEP ident generic_args | SHL ty_sum maybe_as_trait_ref '>' MOD_SEP ident generic_args maybe_as_trait_ref '>' MOD_SEP ident generic_args maybe_qpath_params ::= MOD_SEP generic_args | /*empty*/ maybe_as_trait_ref ::= AS trait_ref | /*empty*/ lambda_expr ::= OROR ret_ty expr | '|' '|' ret_ty expr | '|' inferrable_params '|' ret_ty expr | '|' inferrable_params OROR lambda_expr_no_first_bar lambda_expr_no_first_bar ::= '|' ret_ty expr | inferrable_params '|' ret_ty expr | inferrable_params OROR lambda_expr_no_first_bar lambda_expr_nostruct ::= OROR expr_nostruct | '|' '|' ret_ty expr_nostruct | '|' inferrable_params '|' expr_nostruct | '|' inferrable_params OROR lambda_expr_nostruct_no_first_bar lambda_expr_nostruct_no_first_bar ::= '|' ret_ty expr_nostruct | inferrable_params '|' ret_ty expr_nostruct | inferrable_params OROR lambda_expr_nostruct_no_first_bar vec_expr ::= maybe_exprs | exprs ';' expr struct_expr_fields ::= field_inits | field_inits ',' | maybe_field_inits default_field_init | /*empty*/ maybe_field_inits ::= field_inits | field_inits ',' | /*empty*/ field_inits ::= field_init | field_inits ',' field_init field_init ::= ident | ident ':' expr | LIT_INTEGER ':' expr default_field_init ::= DOTDOT expr block_expr ::= expr_match | expr_if | expr_if_let | expr_while | expr_while_let | expr_loop | expr_for | UNSAFE block | path_expr '!' maybe_ident braces_delimited_token_trees full_block_expr ::= block_expr | block_expr_dot block_expr_dot ::= block_expr '.' path_generic_args_with_colons | block_expr_dot '.' path_generic_args_with_colons | block_expr '.' path_generic_args_with_colons '[' maybe_expr ']' | block_expr_dot '.' path_generic_args_with_colons '[' maybe_expr ']' | block_expr '.' path_generic_args_with_colons '(' maybe_exprs ')' | block_expr_dot '.' path_generic_args_with_colons '(' maybe_exprs ')' | block_expr '.' LIT_INTEGER | block_expr_dot '.' LIT_INTEGER expr_match ::= MATCH expr_nostruct '{' '}' | MATCH expr_nostruct '{' match_clauses '}' | MATCH expr_nostruct '{' match_clauses nonblock_match_clause '}' | MATCH expr_nostruct '{' nonblock_match_clause '}' match_clauses ::= match_clause | match_clauses match_clause match_clause ::= nonblock_match_clause ',' | block_match_clause | block_match_clause ',' nonblock_match_clause ::= maybe_outer_attrs pats_or maybe_guard FAT_ARROW nonblock_expr | maybe_outer_attrs pats_or maybe_guard FAT_ARROW block_expr_dot block_match_clause ::= maybe_outer_attrs pats_or maybe_guard FAT_ARROW block | maybe_outer_attrs pats_or maybe_guard FAT_ARROW block_expr maybe_guard ::= IF expr_nostruct | /*empty*/ expr_if ::= IF expr_nostruct block | IF expr_nostruct block ELSE block_or_if expr_if_let ::= IF LET pat '=' expr_nostruct block | IF LET pat '=' expr_nostruct block ELSE block_or_if block_or_if ::= block | expr_if | expr_if_let expr_while ::= maybe_label WHILE expr_nostruct block expr_while_let ::= maybe_label WHILE LET pat '=' expr_nostruct block expr_loop ::= maybe_label LOOP block expr_for ::= maybe_label FOR pat IN expr_nostruct block maybe_label ::= lifetime ':' | /*empty*/ let ::= LET pat maybe_ty_ascription maybe_init_expr ';' lit ::= LIT_BYTE | LIT_CHAR | LIT_INTEGER | LIT_FLOAT | TRUE | FALSE | str str ::= LIT_STR | LIT_STR_RAW | LIT_BYTE_STR | LIT_BYTE_STR_RAW maybe_ident ::= /*empty*/ | ident ident ::= IDENT | CATCH | DEFAULT | UNION unpaired_token ::= SHL | SHR | LE | EQEQ | NE | GE | ANDAND | OROR | LARROW | SHLEQ | SHREQ | MINUSEQ | ANDEQ | OREQ | PLUSEQ | STAREQ | SLASHEQ | CARETEQ | PERCENTEQ | DOTDOT | DOTDOTDOT | MOD_SEP | RARROW | FAT_ARROW | LIT_BYTE | LIT_CHAR | LIT_INTEGER | LIT_FLOAT | LIT_STR | LIT_STR_RAW | LIT_BYTE_STR | LIT_BYTE_STR_RAW | IDENT | UNDERSCORE | LIFETIME | SELF | STATIC | ABSTRACT | ALIGNOF | AS | BECOME | BREAK | CATCH | CRATE | DEFAULT | DO | ELSE | ENUM | EXTERN | FALSE | FINAL | FN | FOR | IF | IMPL | IN | LET | LOOP | MACRO | MATCH | MOD | MOVE | MUT | OFFSETOF | OVERRIDE | PRIV | PUB | PURE | REF | RETURN | STRUCT | SIZEOF | SUPER | TRUE | TRAIT | TYPE | UNION | UNSAFE | UNSIZED | USE | VIRTUAL | WHILE | YIELD | CONTINUE | PROC | BOX | CONST | WHERE | TYPEOF | INNER_DOC_COMMENT | OUTER_DOC_COMMENT | SHEBANG | STATIC_LIFETIME | ';' | ',' | '.' | '@' | '#' | '~' | ':' | '$' | '=' | '?' | '!' | '<' | '>' | '-' | '&' | '|' | '+' | '*' | '/' | '^' | '%' token_trees ::= /*empty*/ | token_trees token_tree token_tree ::= delimited_token_trees | unpaired_token delimited_token_trees ::= parens_delimited_token_trees | braces_delimited_token_trees | brackets_delimited_token_trees parens_delimited_token_trees ::= '(' token_trees ')' braces_delimited_token_trees ::= '{' token_trees '}' brackets_delimited_token_trees ::= '[' token_trees ']' //Tokens //\(\S+\)\s+{ return\s+\(\S[^;]+\).+ UNDERSCORE ::= "_" ABSTRACT ::= "abstract" ALIGNOF ::= "alignof" AS ::= "as" BECOME ::= "become" BOX ::= "box" BREAK ::= "break" CATCH ::= "catch" CONST ::= "const" CONTINUE ::= "continue" CRATE ::= "crate" DEFAULT ::= "default" DO ::= "do" ELSE ::= "else" ENUM ::= "enum" EXTERN ::= "extern" FALSE ::= "false" FINAL ::= "final" FN ::= "fn" FOR ::= "for" IF ::= "if" IMPL ::= "impl" IN ::= "in" LET ::= "let" LOOP ::= "loop" MACRO ::= "macro" MATCH ::= "match" MOD ::= "mod" MOVE ::= "move" MUT ::= "mut" OFFSETOF ::= "offsetof" OVERRIDE ::= "override" PRIV ::= "priv" PROC ::= "proc" PURE ::= "pure" PUB ::= "pub" REF ::= "ref" RETURN ::= "return" SELF ::= "self" SIZEOF ::= "sizeof" STATIC ::= "static" STRUCT ::= "struct" SUPER ::= "super" TRAIT ::= "trait" TRUE ::= "true" TYPE ::= "type" TYPEOF ::= "typeof" UNION ::= "union" UNSAFE ::= "unsafe" UNSIZED ::= "unsized" USE ::= "use" VIRTUAL ::= "virtual" WHERE ::= "where" WHILE ::= "while" YIELD ::= "yield" DOTDOTDOT ::= "..." DOTDOT ::= ".." MOD_SEP ::= "::" EQEQ ::= "==" FAT_ARROW ::= "=>" NE ::= "!=" LE ::= "<=" SHL ::= "<<" SHLEQ ::= "<<=" GE ::= ">=" SHR ::= ">>" SHREQ ::= ">>=" LARROW ::= "<-" RARROW ::= "->" MINUSEQ ::= "-=" ANDAND ::= "&&" ANDEQ ::= "&=" OROR ::= "||" OREQ ::= "|=" PLUSEQ ::= "+=" STAREQ ::= "*=" SLASHEQ ::= "/=" CARETEQ ::= "^=" PERCENTEQ ::= "%="
Using some online tools like https://www.bottlecaps.de/rr/ui and https://www.bottlecaps.de/convert/ we can have a nice navigable railroad diagram.
Copy and paste the
EBNFshown bellow on https://www.bottlecaps.de/rr/ui on the tabEdit Grammarthe click on the tabView Diagramto see/download a navigable railroad diagram.