diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/changelog/02-specification-language/13188-instance-gen.rst | 6 | ||||
| -rw-r--r-- | doc/sphinx/addendum/type-classes.rst | 10 |
2 files changed, 16 insertions, 0 deletions
diff --git a/doc/changelog/02-specification-language/13188-instance-gen.rst b/doc/changelog/02-specification-language/13188-instance-gen.rst new file mode 100644 index 0000000000..6a431f85ed --- /dev/null +++ b/doc/changelog/02-specification-language/13188-instance-gen.rst @@ -0,0 +1,6 @@ +- **Removed:** The type given to :cmd:`Instance` is no longer automatically + generalized over unbound and :ref:`generalizable <implicit-generalization>` variables. + Use :n:`Instance : \`{@type}` instead of :n:`Instance : @type` to get the old behaviour, or + enable the compatibility flag :flag:`Instance Generalized Output`. + (`#13188 <https://github.com/coq/coq/pull/13188>`_, fixes `#6042 + <https://github.com/coq/coq/issues/6042>`_, by Gaëtan Gilbert). diff --git a/doc/sphinx/addendum/type-classes.rst b/doc/sphinx/addendum/type-classes.rst index cdd31fcb86..e311544c86 100644 --- a/doc/sphinx/addendum/type-classes.rst +++ b/doc/sphinx/addendum/type-classes.rst @@ -388,6 +388,16 @@ Summary of the commands equivalent to ``Hint Resolve ident : typeclass_instances``, except it registers instances for :cmd:`Print Instances`. + .. flag:: Instance Generalized Output + + .. deprecated:: 8.13 + + Disabled by default, this provides compatibility with Coq + version 8.12 and earlier. + + When enabled, the type of the instance is implicitly generalized + over unbound and :ref:`generalizable <implicit-generalization>` variables as though surrounded by ``\`{}``. + .. cmd:: Print Instances @reference Shows the list of instances associated with the typeclass :token:`reference`. |