Intro is a modern Prelude which provides safe alternatives
for most of the partial functions and follows other
best practices, e.g., Text is preferred over String.
For String overloading the extension ‘OverloadedStrings’ should be used.
Container types and Monad transformers are provided.
Most important - this Prelude tries to keep things simple and minimal.
This means it just reexports from base and commonly used libraries
and adds only very few additional functions.
List of design decisions:
Keep everything at one place (Actually there are three modules; Intro.Trustworthy is needed for Safe Haskell)
Conservative extension over the base Prelude
Rely only on common additional libraries
Avoid writing custom functions
Export everything explicitly to provide a stable interface and good documentation
Export only total functions or provide safe alternatives (Very few exceptions like div etc.)
Prefer Text over String, provide ConvertString and EncodeString
Provide monad transformers
Provide container types
Prefer generic functions
Debugging functions, like ‘Intro.Trustworthy.trace’ and ‘undefined’ are available but produce compile time warnings
Replace error with panic
Compatibility with unqualified import of Control.Lens and Optics