The Book of Types
The Book of Types
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The Book of Types

This book is 35% complete

Last updated on 2018-09-23

About the Book

Table of Contents

I

Fundamentals

1 Variance




II

Lifting Restrictions


2 Working with Types

2.1 Type Scoping

2.2 Type Applications

2.3 Ambiguous Types


3 Constraints, Type Equalities and GADTs

3.1 Introduction

3.2 GADTs

3.3 Heterogeneous Lists


4 Rank-N Types

4.1 Introduction

4.2 Ranks

4.3 The Nitty Gritty Details

4.4 The Continuation Monad




III

Computing at the Type-Level


5 Existential Types

5.1 Existential Types and Eliminators

5.1.1 Dynamic Types

5.1.2 Generalized Constraint-Kinded Existentials

5.2 Scoping Information with Existentials


6 Roles

6.1 Coercions

6.2 Roles


7 Terms, Types and Kinds

7.1 The Kind System

7.2 Data Kinds

7.3 Promotion of Built-In Types

7.4 Type-Level Functions


8 Associated Type Families

8.1 Building Types from a Schema

8.2 Generating Associated Terms

8.3 Ambiguous Types and Non-Injectivity


9 First Class Families

9.1 Defunctionalization

9.2 Type-Level Defunctionalization

9.3 Working with First Class Families

9.4 Ad-Hoc Polymorphism


10 Custom Type Errors


11 Indexed Monads

11.1 Definition and Necessary Machinery

11.2 Linear Allocations


12 Dependent Types

12.1 Overview

12.2 Ad-Hoc Implementation

12.3 Generalized Machinery

12.4 The Singletons Package

12.5 Dependent Pairs

12.5.1 Structured Logging




IV

Pragmatic Patterns for the Working Haskell Programmer


13 Generics

13.1 Generic Representations

13.2 Deriving Structural Polymorphism

13.3 Using Generic Metadata

13.4 Performance

13.5 Kan Extensions


14 Extensible Data

14.1 Introduction

14.2 Open Sums

14.3 Open Products

14.4 Overloaded Labels


15 Higher Kinded Data

15.1 What is Higher Kinded Data?

15.2 OOP Class/Instances


About the Author

Sandy Maguire
Sandy Maguire

Sandy might best be described somewhere between independent researcher and voluntarily-unemployed bum. At the ripe old age of 27 he decided to quit his highly-lucrative engineering job and decide to focus more on living than on grinding for the man. It's what you might call a work in progress.

He regularly writes about Haskell at reasonablypolymorphic.com.

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