6.3.5. Writing qualified in postpositive position¶
-
ImportQualifiedPost
¶ Since: 8.10.1 ImportQualifiedPost
allows the syntaximport M qualified
, that is, to annotate a module as qualified by writingqualified
after the module name.
To import a qualified module usually you must specify qualified
in prepositive position : import qualified M
. This often leads to a “hanging indent” (which is automatically inserted by some autoformatters and common in many code bases. For example:
import qualified A
import B
import C
The ImportQualifiedPost
extension allows qualified
to appear in postpositive position : import M qualified
. With this extension enabled, one can write:
import A qualified
import B
import C
It is an error if qualified
appears in both pre and postpositive positions.
The warning -Wprepositive-qualified-syntax
(off by default) reports on any occurrences of imports annotated qualified
using prepositive syntax.