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• java_cup.runtime: Javadoc index of package java_cup.runtime.


Package Samples:

• java_cup.runtime

Classes:

• lr_parser: This class implements a skeleton table driven LR parser. In general, LR parsers are a form of bottom up shift-reduce parsers. Shift-reduce parsers act by shifting input onto a parse stack until the Symbols matching the right hand side of a production appear on the top of the stack. Once this occurs, a reduce is performed. This involves removing the Symbols corresponding to the right hand side of the production (the so called "handle") and replacing them with the non-terminal from the left hand side of the production. To control the decision of whether to shift or reduce at any given point, the ...
• virtual_parse_stack: This class implements a temporary or "virtual" parse stack that replaces the top portion of the actual parse stack (the part that has been changed by some set of operations) while maintaining its original contents. This data structure is used when the parse needs to "parse ahead" to determine if a given error recovery attempt will allow the parse to continue far enough to consider it successful. Once success or failure of parse ahead is determined the system then reverts to the original parse stack (which has not actually been modified). Since parse ahead does not execute actions, only parse state ...
• Scanner: Defines the Scanner interface, which CUP uses in the default implementation of lr_parser.scan() . Integration of scanners implementing Scanner is facilitated.
• Symbol: Defines the Symbol class, which is used to represent all terminals and nonterminals while parsing. The lexer should pass CUP Symbols and CUP returns a Symbol.

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