Chapter 6. Programming with first-class types
This chapter covers
- Programming with type-level functions
- Writing functions with varying numbers of arguments
- Using type-level functions to calculate the structure of data
- Refining larger interactive programs
In Idris, as you’ve seen several times now, types can be manipulated just like any other language construct. For example, they can be stored in variables, passed to functions, or constructed by functions. Furthermore, because they’re truly first-class, expressions can compute types, and types can also take any expression as an argument. You’ve seen several uses of this concept in practice, in particular the ability to store additional information about data in its type, such as the length ...
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