diff options
| author | Zejun Wu <watashi@fb.com> | 2019-01-30 17:35:50 -0800 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2019-02-03 03:14:03 -0500 |
| commit | 59d622d7f1a982e5f24bb0eb8e72121d3ef2270c (patch) | |
| tree | d66245b72c5a9cc3281145fc3a613ab8c20a5764 /docs | |
| parent | 71dae4eb1a4891fc1a428caf70a06830864ffdc3 (diff) | |
| download | haskell-59d622d7f1a982e5f24bb0eb8e72121d3ef2270c.tar.gz | |
docs: change meta-variable of -interactive-print from expr to name
`-interactive-print` doesn't accept **expr** as `-e` or `:def` does. It must
be a qualified or unqualified **name** in scope.
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/ghci.rst | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/docs/users_guide/ghci.rst b/docs/users_guide/ghci.rst index f468e80eb0..05b64f9340 100644 --- a/docs/users_guide/ghci.rst +++ b/docs/users_guide/ghci.rst @@ -1181,20 +1181,20 @@ IO ()``, and it works by converting the value to ``String`` using ``show``. This is not ideal in certain cases, like when the output is long, or contains strings with non-ascii characters. -The :ghc-flag:`-interactive-print ⟨expr⟩` flag allows to specify any function +The :ghc-flag:`-interactive-print ⟨name⟩` flag allows to specify any function of type ``C a => a -> IO ()``, for some constraint ``C``, as the function for printing evaluated expressions. The function can reside in any loaded module or any registered package, but only when it resides in a registered package will it survive a :ghci-cmd:`:cd`, :ghci-cmd:`:add`, :ghci-cmd:`:load`, :ghci-cmd:`:reload` or, :ghci-cmd:`:set`. -.. ghc-flag:: -interactive-print ⟨expr⟩ +.. ghc-flag:: -interactive-print ⟨name⟩ :shortdesc: :ref:`Select the function to use for printing evaluated expressions in GHCi <ghci-interactive-print>` :type: dynamic :category: - Set the function used by GHCi to print evaluation results. Expression + Set the function used by GHCi to print evaluation results. Given name must be of type ``C a => a -> IO ()``. As an example, suppose we have following special printing module: :: @@ -1224,7 +1224,7 @@ will start an interactive session where values with be printed using A custom pretty printing function can be used, for example, to format tree-like and nested structures in a more readable way. -The :ghc-flag:`-interactive-print ⟨expr⟩` flag can also be used when running +The :ghc-flag:`-interactive-print ⟨name⟩` flag can also be used when running GHC in ``-e mode``: .. code-block:: none |