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Unparser : ウィキペディア英語版
Unparser

In computing, an unparser is a system that constructs a set of characters or image components from a given parse tree.〔''Software Science and Engineering'' edited by Ikuo Nakata 1991 ISBN 981020776X page 168〕〔
An unparser is in effect the reverse of a traditional parser which takes a string of characters and produces a parse tree. Unparsing generally involves the application of a specific set of rules to the parse tree as a "tree walk" takes place.〔
Given that the tree may involve both textual and graphic elements, the unparser may have two separate modules, each of which handles the relevant components.〔''Handbook of Graph Grammars and Computing by Graph Transformation: Applications, Languages and Tools'' by H. Ehrig, G. Engels 1999 ISBN 9810240201 pages 231-232〕 In such cases the "master unparser" looks up the "master unparse table" to determine if a given nested structure should be handled by one module, or the other.〔
==See also==

* Formal grammar

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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