diff options
| author | coqbot-app[bot] | 2020-11-20 22:01:06 +0000 |
|---|---|---|
| committer | GitHub | 2020-11-20 22:01:06 +0000 |
| commit | 23d30fa1c19af9a29787204d81d7bd2d2e0c9b1f (patch) | |
| tree | 98e1452ac1c2b2e88178461fbe51393d1d918f3e /doc | |
| parent | 87a59a875b0945fa7976fd16b17a2ff5dd015402 (diff) | |
| parent | 345bcc504a1ed4f11d328cc1dfa17ba37f6875b3 (diff) | |
Merge PR #13265: Add support for general non-necessarily-recursive binders in notations
Reviewed-by: ejgallego
Ack-by: Zimmi48
Ack-by: jfehrle
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/changelog/03-notations/13265-master+allow-single-binder-entry.rst | 6 | ||||
| -rw-r--r-- | doc/sphinx/user-extensions/syntax-extensions.rst | 24 |
2 files changed, 30 insertions, 0 deletions
diff --git a/doc/changelog/03-notations/13265-master+allow-single-binder-entry.rst b/doc/changelog/03-notations/13265-master+allow-single-binder-entry.rst new file mode 100644 index 0000000000..c973e157dd --- /dev/null +++ b/doc/changelog/03-notations/13265-master+allow-single-binder-entry.rst @@ -0,0 +1,6 @@ +- **Added:** + The :n:`@binder` entry of :cmd:`Notation` can now be used in + notations expecting a single (non-recursive) binder + (`#13265 <https://github.com/coq/coq/pull/13265>`_, + by Hugo Herbelin, see section :n:`notations-and-binders` of the + reference manual). diff --git a/doc/sphinx/user-extensions/syntax-extensions.rst b/doc/sphinx/user-extensions/syntax-extensions.rst index 16c8586a9f..5cbd2e400e 100644 --- a/doc/sphinx/user-extensions/syntax-extensions.rst +++ b/doc/sphinx/user-extensions/syntax-extensions.rst @@ -709,6 +709,30 @@ Note also that in the absence of a ``as ident``, ``as strict pattern`` or ``as pattern`` :n:`@syntax_modifier`\s, the default is to consider sub-expressions occurring in binding position and parsed as terms to be ``as ident``. +Binders bound in the notation and parsed as general binders ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + +It is also possible to rely on Coq's syntax of binders using the +`binder` modifier as follows: + +.. coqtop:: in + + Notation "'myforall' p , [ P , Q ] " := (forall p, P -> Q) + (at level 200, p binder). + +In this case, all of :n:`@ident`, :n:`{@ident}`, :n:`[@ident]`, :n:`@ident:@type`, +:n:`{@ident:@type}`, :n:`[@ident:@type]`, :n:`'@pattern` can be used in place of +the corresponding notation variable. In particular, the binder can +declare implicit arguments: + +.. coqtop:: all + + Check fun (f : myforall {a}, [a=0, Prop]) => f eq_refl. + Check myforall '((x,y):nat*nat), [ x = y, True ]. + +By using instead `closed binder`, the same list of binders is allowed +except that :n:`@ident:@type` requires parentheses around. + .. _NotationsWithBinders: Binders not bound in the notation |