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Diffstat (limited to 'docs/users_guide/bugs.rst')
| -rw-r--r-- | docs/users_guide/bugs.rst | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/docs/users_guide/bugs.rst b/docs/users_guide/bugs.rst index cfcfc0417c..2f6eecd54a 100644 --- a/docs/users_guide/bugs.rst +++ b/docs/users_guide/bugs.rst @@ -121,6 +121,8 @@ Context-free syntax :shortdesc: Allow nested contexts to be at the same indentation level as its enclosing context. + :since: 7.2.1 + Allow nested contexts to be at the same indentation level as its enclosing context. @@ -189,7 +191,7 @@ For example Will warn you with -:: +.. code-block:: none • Could not deduce (MonadFail m) arising from a do statement @@ -199,7 +201,7 @@ Will warn you with mayFail :: forall (m :: * -> *). MonadIO m => m () And indeed, since the `Monad <https://hackage.haskell.org/package/base-4.14.1.0/docs/Control-Monad.html#t:Monad>`__ class does not have the ``fail`` method anymore, -we need to explicitly add ``(MonadFail m)`` to the contraints of the function. +we need to explicitly add ``(MonadFail m)`` to the constraints of the function. .. _infelicities-decls: @@ -337,10 +339,10 @@ Numbers, basic types, and built-in classes by: - Whenever you make a ``Num`` instance of a type, also make - ``Show`` and ``Eq`` instances, and + ``Show`` and ``Eq`` instances, and - Whenever you give a function, instance or class a ``Num t`` - constraint, also give it ``Show t`` and ``Eq t`` constraints. + constraint, also give it ``Show t`` and ``Eq t`` constraints. ``Bits`` superclass The ``Bits`` class does not have a ``Num`` superclass. It @@ -350,13 +352,13 @@ Numbers, basic types, and built-in classes You can make code that works with both Haskell 2010 and GHC by: - Whenever you make a ``Bits`` instance of a type, also make a - ``Num`` instance, and + ``Num`` instance, and - Whenever you give a function, instance or class a ``Bits t`` - constraint, also give it a ``Num t`` constraint, and + constraint, also give it a ``Num t`` constraint, and - Always define the ``bit``, ``testBit`` and ``popCount`` methods - in ``Bits`` instances. + in ``Bits`` instances. ``Read`` class methods The ``Read`` class has two extra methods, ``readPrec`` and |