diff --git a/src/doc/rust.md b/src/doc/rust.md index c312f2c1fe511..d686a02b2fe64 100644 --- a/src/doc/rust.md +++ b/src/doc/rust.md @@ -848,11 +848,11 @@ extern crate foo = "some/where/rust-foo#foo:1.0"; // a full crate ID for externa ##### Use declarations ~~~~ {.notrust .ebnf .gram} -use_decl : "pub" ? "use" ident [ '=' path - | "::" path_glob ] ; +use_decl : "pub" ? "use" [ ident '=' path + | path_glob ] ; -path_glob : ident [ "::" path_glob ] ? - | '*' +path_glob : ident [ "::" [ path_glob + | '*' ] ] ? | '{' ident [ ',' ident ] * '}' ; ~~~~ @@ -1743,7 +1743,7 @@ import public items from their destination, not private items. attribute : '#' '!' ? '[' meta_item ']' ; meta_item : ident [ '=' literal | '(' meta_seq ')' ] ? ; -meta_seq : meta_item [ ',' meta_seq ]* ; +meta_seq : meta_item [ ',' meta_seq ] ? ; ~~~~ Static entities in Rust — crates, modules and items — may have _attributes_ @@ -3027,11 +3027,11 @@ then any `else` block is executed. ### Match expressions ~~~~ {.notrust .ebnf .gram} -match_expr : "match" expr '{' match_arm [ '|' match_arm ] * '}' ; +match_expr : "match" expr '{' match_arm * '}' ; -match_arm : match_pat "=>" [ expr "," | '{' block '}' ] ; +match_arm : attribute * match_pat "=>" [ expr "," | '{' block '}' ] ; -match_pat : pat [ ".." pat ] ? [ "if" expr ] ; +match_pat : pat [ '|' pat ] * [ "if" expr ] ? ; ~~~~ A `match` expression branches on a *pattern*. The exact form of matching that @@ -3137,7 +3137,7 @@ using the `ref` keyword, or to a mutable reference using `ref mut`. Subpatterns can also be bound to variables by the use of the syntax -`variable @ pattern`. +`variable @ subpattern`. For example: ~~~~