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egnha / valaddin

Functional input validation to make R functions more readable and robust
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Boolean algebra for check formulae #17

Closed egnha closed 5 years ago

egnha commented 7 years ago

Define a generic operator isnt which negates check formulae and (localized) check makers. Should take into account that the predicate may be expressed as a lambda function.

egnha commented 7 years ago

Predicate functions form a boolean algebra—is there a meaningful way to extend this to check formulae? The tricky part would be transferring the boolean structure to error messages in a manner that doesn't degrade them, linguistically.

egnha commented 5 years ago

Package frozen at 1.0.0.