Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An operator precedence grammar is a kind of context-free grammar that can be parsed with an operator-precedence parser. It has the property that no production has either an empty right-hand side or two adjacent nonterminals in its right-hand side. These properties allow the terminals of the grammar to be described by a precedence relation, and the a parser that exploits that relation is considerably simpler than more general-purpose parsers such as LALR parsers. Bottom-up parsers for a large class of context-free grammars can be easily developed using operator grammars. Operator grammars have the property that no production right side is empty or has two adjacent nonterminals.

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