Skip to content

reference grammar: loop label should be optional #28202

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Sep 4, 2015
Merged

reference grammar: loop label should be optional #28202

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
12 changes: 6 additions & 6 deletions src/doc/grammar.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -636,31 +636,31 @@ lambda_expr : '|' ident_list '|' expr ;
### While loops

```antlr
while_expr : [ lifetime ':' ] "while" no_struct_literal_expr '{' block '}' ;
while_expr : [ lifetime ':' ] ? "while" no_struct_literal_expr '{' block '}' ;
```

### Infinite loops

```antlr
loop_expr : [ lifetime ':' ] "loop" '{' block '}';
loop_expr : [ lifetime ':' ] ? "loop" '{' block '}';
```

### Break expressions

```antlr
break_expr : "break" [ lifetime ];
break_expr : "break" [ lifetime ] ?;
```

### Continue expressions

```antlr
continue_expr : "continue" [ lifetime ];
continue_expr : "continue" [ lifetime ] ?;
```

### For expressions

```antlr
for_expr : [ lifetime ':' ] "for" pat "in" no_struct_literal_expr '{' block '}' ;
for_expr : [ lifetime ':' ] ? "for" pat "in" no_struct_literal_expr '{' block '}' ;
```

### If expressions
Expand Down Expand Up @@ -694,7 +694,7 @@ else_tail : "else" [ if_expr | if_let_expr | '{' block '}' ] ;
### While let loops

```antlr
while_let_expr : "while" "let" pat '=' expr '{' block '}' ;
while_let_expr : [ lifetime ':' ] ? "while" "let" pat '=' expr '{' block '}' ;
```

### Return expressions
Expand Down