ANTLR3 DOCUMENTATION PDF

Vudosho Package: antlr3-doc 3. The error display routine in BaseRecognizer needs to display where the input the docjmentation occurred. There is no way to force the first node to be the root. This is the analog of RewriteRuleTokenStream for normal parsers. Stack Overflow works best with JavaScript enabled. All the error reporting and recovery is shared with Parser via the BaseRecognizer superclass.

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ANTLR takes as input a grammar that specifies a language and generates as output source code for a recognizer of that language. Parsers can automatically generate parse trees or abstract syntax trees , which can be further processed with tree parsers. ANTLR provides a single consistent notation for specifying lexers, parsers, and tree parsers. By default, ANTLR reads a grammar and generates a recognizer for the language defined by the grammar i.

If there are no syntax errors, the default action is to simply exit without printing any message. In order to do something useful with the language, actions can be attached to grammar elements in the grammar.

These actions are written in the programming language in which the recognizer is being generated. When the recognizer is being generated, the actions are embedded in the source code of the recognizer at the appropriate points.

Actions can be used to build and check symbol tables and to emit instructions in a target language, in the case of a compiler. These are recognizers that process abstract syntax trees, which can be automatically generated by parsers.

That is, actions can be defined separately from the grammar, allowing for easier targeting of multiple languages.

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Class: ANTLR3::Lexer

ANTLR takes as input a grammar that specifies a language and generates as output source code for a recognizer of that language. Parsers can automatically generate parse trees or abstract syntax trees , which can be further processed with tree parsers. ANTLR provides a single consistent notation for specifying lexers, parsers, and tree parsers. By default, ANTLR reads a grammar and generates a recognizer for the language defined by the grammar i. If there are no syntax errors, the default action is to simply exit without printing any message. In order to do something useful with the language, actions can be attached to grammar elements in the grammar.

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ANTLR3 DOCUMENTATION PDF

Users who have contributed to this file lines 84 sloc 4. There are currently no rule options. Grammar Options All grammars can use the following options. In combined grammars, all options except language pertain only to the generated parser.

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