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Function of the day
Single "from" version of mkMergedOptionModule. Return a module that causes a warning to be shown if the "from" option is defined; the defined value can be used in the "mergeFn" to set the "to" value. This function can be used to change an option into another that has a different type.
"mergeFn" takes the module "config" as a parameter and must return a value of "to" option type.
mkChangedOptionModule [ "a" "b" "c" ] [ "x" "y" "z" ] (config: let value = getAttrFromPath [ "a" "b" "c" ] config; in if value > 100 then "high" else "normal")
- options.a.b.c is a removed int option
- options.x.y.z is a new str option that supersedes a.b.c
This show a warning if a.b.c is set, and set the value of x.y.z to the result of the change function
Inputs
from
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1. Function argument
to
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2. Function argument
changeFn
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3. Function argument