diff options
Diffstat (limited to 'doc/tools/coqrst/notations/TacticNotations.g')
| -rw-r--r-- | doc/tools/coqrst/notations/TacticNotations.g | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/doc/tools/coqrst/notations/TacticNotations.g b/doc/tools/coqrst/notations/TacticNotations.g index a889ebda7b..01c656eb23 100644 --- a/doc/tools/coqrst/notations/TacticNotations.g +++ b/doc/tools/coqrst/notations/TacticNotations.g @@ -13,21 +13,38 @@ grammar TacticNotations; // needs rendering (in particular whitespace (kept in output) vs. WHITESPACE // (discarded)). +// The distinction between nopipeblock and block is needed because we only want +// to require escaping within alternative blocks, so that e.g. `first [ x | y ]` +// can be written without escaping the `|`. + top: blocks EOF; blocks: block ((whitespace)? block)*; -block: atomic | meta | hole | repeat | curlies; -repeat: LGROUP (ATOM)? WHITESPACE blocks (WHITESPACE)? RBRACE; + +block: pipe | nopipeblock; +nopipeblock: atomic | escaped | hole | alternative | repeat | curlies; + +alternative: LALT (WHITESPACE)? altblocks (WHITESPACE)? RBRACE; +altblocks: altblock ((WHITESPACE)? altsep (WHITESPACE)? altblock)+; +altblock: nopipeblock ((whitespace)? nopipeblock)*; + +repeat: LGROUP (ATOM | PIPE)? WHITESPACE blocks (WHITESPACE)? RBRACE; curlies: LBRACE (whitespace)? blocks (whitespace)? RBRACE; + +pipe: PIPE; +altsep: PIPE; whitespace: WHITESPACE; -meta: METACHAR; +escaped: ESCAPED; atomic: ATOM (SUB)?; hole: ID (SUB)?; -LGROUP: '{' [+*?]; + +LALT: '{|'; +LGROUP: '{+' | '{*' | '{?'; LBRACE: '{'; RBRACE: '}'; -METACHAR: '%' [|(){}]; -ATOM: '@' | '_' | ~[@_{} ]+; +ESCAPED: '%{' | '%}' | '%|'; +PIPE: '|'; +ATOM: '@' | '_' | ~[@_{}| ]+; ID: '@' ('_'? [a-zA-Z0-9])+; SUB: '_' '_' [a-zA-Z0-9]+; WHITESPACE: ' '+; |