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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク LR-attributed grammar ： ウィキペディア英語版 LR-attributed grammar LR-attributed grammars are a special type of attribute grammars. They allow the attributes to be evaluated on LR parsing. As a result, attribute evaluation in LR-attributed grammars can be incorporated conveniently in bottom-up parsing. zyacc is based on LR-attributed grammars. They are a subset of the L-attributed grammars, where the attributes can be evaluated in one left-to-right traversal of the abstract syntax tree. They are a superset of the S-attributed grammars, which allow only synthesized attributes. In yacc, a common hack is to use global variables to simulate some kind of inherited attributes and thus LR-attribution. ==External links== * http://www.cs.binghamton.edu/~zdu/zyacc/doc/zyacc_4.html * Reinhard Wilhelm: LL- and LR-Attributed Grammars. ''Programmiersprachen und Programmentwicklung, 7. Fachtagung, veranstaltet vom Fachausschuß 2 der GI'' (1982), 151–164, Informatik-Fachberichte volume 53. * J. van Katwijk: A preprocessor for YACC or A poor man's approach to parsing attributed grammars. ''Sigplan Notices'' 18:10 (1983), 12–15. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「LR-attributed grammar」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.