Overview | Ceci n’est pas une %>% | Select segments of functions using indexing | Repurpose using subset-assignment | Inspect or modify using higher-order functions | The value of values as functions | Complements | Acknowledgments

Use cases | Enforce types for arguments | Enforce constraints on argument values | Warn about pitfalls | Use loosely to access the original function | Decline handouts | Reduce the risks of a lazy evaluation-style | Prevent self-inflicted wounds | Toolbox of input checkers | Check anything with vld_true | Make your own input checker with localize | Related packages | Packages that enhance valaddin | Other approaches to input validation