optionalRelated
Test a known optional target. Absence yields False, so negation includes absence as well as targets that fail the child predicate.
Source and package
- Qualified name
-
LibTmux .Query. optional Related - Declared in
LibTmux.Query- Package
- libtmux-haskell
- Source
- internal/LibTmux/Internal/Query.hs
- optionalRelated :: To
Optional row child -> Expr child -> Expr row
Referenced declarations#
- LibTmux.Query.Expr data type
- LibTmux.Query.ToOptional data type
Guides#
Pages that discuss optionalRelated.