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-rw-r--r--docs/users_guide/using-warnings.rst7
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/users_guide/using-warnings.rst b/docs/users_guide/using-warnings.rst
index aeabbe9713..f603a4cf28 100644
--- a/docs/users_guide/using-warnings.rst
+++ b/docs/users_guide/using-warnings.rst
@@ -39,6 +39,7 @@ generally likely to indicate bugs in your program. These are:
* :ghc-flag:`-Winaccessible-code`
* :ghc-flag:`-Wstar-is-type`
* :ghc-flag:`-Wstar-binder`
+ * :ghc-flag:`-Wspace-after-bang`
The following flags are simple ways to select standard "packages" of warnings:
@@ -1256,6 +1257,12 @@ of ``-W(no-)*``.
per-module basis with :ghc-flag:`-Wno-simplifiable-class-constraints
<-Wsimplifiable-class-constraints>`.
+.. ghc-flag:: -Wspace-after-bang
+ :shortdesc: warn for missing space before the second argument
+ of an infix definition of ``(!)`` when
+ :ghc-flag:`-XBangPatterns` are not enabled
+ :type: dynamic
+ :reverse: -Wno-missing-space-after-bang
.. ghc-flag:: -Wtabs
:shortdesc: warn if there are tabs in the source file
:type: dynamic