package preface

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Laws
Minimal definition
Structure anatomy
Complete API
Additional references

package preface

preface
- Preface
preface.core
- Preface_core
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preface.stdlib
- Preface_stdlib
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    Over
    
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    Tape
    
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    A
    
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    Selective
    
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Legend:
Library
Module
Module type
Parameter
Class
Class type

Invariant is and "Invariant Functor". Every Functor and Contravariant is an Invariant Functor.

Laws

To have a predictable behaviour, the instance of Invariant must obey some laws.

invmap id id = id
invmap f2 f2' % invmap f1 f1' = invmap (f2 % f1) (f1' % f2')

Minimal definition

module type WITH_INVMAP = sig ... end

Structure anatomy

module type CORE = WITH_INVMAP

Complete API

module type API = CORE

The complete interface of an Invariant.

package preface

Laws

Minimal definition

Structure anatomy

Complete API

Additional references