An Eclipse plugin that contributes ANTLR V4 grammar editor and builder to the Eclipse platform.
- Antlr Editor and Outline View – full syntax-directed editor
- Grammar Formatter
- Antlr elements handled using custom formatter
- Java elements are handled using the JDT platform formatter
- Grammar Builder – incremental Lexer/Parser generator
- Parse tree view – visualization of dynamically generated parse tree
- includes tokens list and full parser/lexer errors list
- Rule paths view – visualization of connection paths between rules
- automatically associated with ANTLR4 grammars (“.g4”)
- available in any Eclipse project (native code features only available in Java projects)
- the builder requires a package header in the grammar – required to determine build destination
- build destination must be a package in a source folder of the containing project
- the formatter is invoked using the standard platform format command (ctrl-shift-f)
- should only modify whitespace – ctrl-z will undo changes
- the sophistication of the formatter is evolving
Parse Tree View
- the parse tree is built from a full live execution of the parser.
- the generated tree will reflect the true exection of the grammar, including custom Token, TokenFactory and ErrorStrategy implementations.
- Requires a split parser and lexer grammar that generates without errors.
- The grammar code gen directory must be on the project build path.
- Superclass and any helper classes referenced by the grammar generated code must be properly on the project build path.
- Have the Antlr grammar (lexer or parser) open in the active editor window.
- Open the Tokens view from the platform toolbar .
- Check and update the integration parameters. A token factory is required if execution of the parser relies on custom tokens. The factory supplied must have a valid no-arg constructor.
- Select a file continaing the source data to be parsed
- The parse tree display will open automatically on a successful parser generation and run.
Rule Paths View
- Performs a rule connectivity analysis relative to any selected rule
- identifies all possible paths from the start rule to the selected rule
- start rule is presumed to be the first listed rule in the grammar
- Open the Paths view
from the platform toolbar
- the view is an ordinary Eclipse editor window - position as desired.
- Have a parser or combined grammar open in the active editor window.
- Select a grammar rule from the platform Outline view
- The paths view will automatically display the connectivity graph.
- Eclipse 4.5.2 on Java 8 JDK VM
- Eclipse Zest Visualization Toolkit 1.5
Eclipse Public License v1.0