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The deterministic cancellation parser with a recursive descent structure — represented by authors — provides the ability of parsing a broader range of grammars, including those with any kind of left recursion, in linear time. Its modular recursive descent structure resembles the structure of original grammars imitating the steps of derivation sequences for accepting input strings. In addition to its...
Traditional top-down parsers have both merits and constraints. Their structure is often simple and similar to the structure of the original grammar. Furthermore, they can handle empty rules but they cannot handle various types of left recursion in grammars. Transformation of left-recursive grammars during the normalization process will affect the semantic structure of the rules which is not appropriate...
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