DiffLanguage< I, E > Struct Template Reference

#include "lib/diff/diff-language.hpp"

Description

template<class I, typename E>
struct lib::diff::DiffLanguage< I, E >

Definition frame for a language to describe differences in data structures.

We use a linearised representation as a sequence of DiffStep messages of constant size. The actual verbs of the diff language in use are defined through the operations of the Interpreter; each #VerbToken corresponds to a handler function on the Interpreter interface. In addition to the verb, each DiffStep also carries a content data element as argument, like e.g. "insert elm at next position".

Parameters

I	Interpreter interface of the actual language to use
E	type of the elementary data elements.

Remarks

recommendation is to set up a builder function for each distinct kind of verb to be used in the actual language: this #diffTokenBuilder takes the data element as argument and wraps a copy in the created DiffStep of the specific kind it is configured for.

Definition at line 147 of file diff-language.hpp.

Public Types
using	DiffToken = std::tuple< DiffVerb, E >
using	DiffVerb = VerbToken< I, void(E const &)>
using	Interpreter = I

Static Public Attributes
static const DiffStep	NIL = DiffStep(DiffVerb(), E())
	fixed "invalid" marker token More...

Classes
struct	DiffStep

Member Data Documentation

NIL

const DiffLanguage< I, E >::DiffStep NIL = DiffStep(DiffVerb(), E())

static

fixed "invalid" marker token

Warning

use for internal state marking only – invoking this token produces undefined behaviour

Definition at line 179 of file diff-language.hpp.

Inheritance diagram for DiffLanguage< I, E >:

Collaboration diagram for DiffLanguage< I, E >:

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The documentation for this struct was generated from the following file:

• diff-language.hpp