Real World Haskell - 第3章 Part2 Type synonyms

Haskell プログラミング

Real World Haskell で Haskell を継続的に勉強中。

Defining Types, Streamlining Functions

Chapter 3. Defining Types, Streamlining Functions

Type synonyms
  • type の synonym を作成可能
type CustomerID = Int
type ReviewBody = String

data BetterReview = BetterReview BookInfo CustomerID ReviewBody

type BookRecord = (BookInfo, BookReview)

参考