In computing, an unparser is a system that constructs a set of characters or image components from a given parse tree.[1][2]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/6e/ParseTree.svg/150px-ParseTree.svg.png)
An unparser is in effect the reverse of a traditional parser that takes a set of 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.[1]
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.[2] 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.[2]
See also
editReferences
edit- ^ a b Software Science and Engineering edited by Ikuo Nakata 1991 ISBN 981020776X page 168
- ^ a b c Handbook of Graph Grammars and Computing by Graph Transformation: Applications, Languages and Tools by H. Ehrig, G. Engels 1999 ISBN 9810240201 pages 231-232