= !FeatureList xText EBNF Version 2.0 = == Core Features: == 1. BNF front-end (Parser, Lexer, Linker, etc.) 1. translates a textual representation into an Ecore model 1. Editor - provides IDE features, e.g. auto-completion, syntax highlighting, etc. == Validation Rules: == These rules will give warnings in the editor if they find find consistencies in the code. 1. ''__checkUpdateGrammarConsistency__:'' checks, if the grammar is an updated grammar, for consistencies between the originals and the new grammar * status: not migrated 1. ''__checkReferencedOnlyOnce__:'' this should warn if there is a rule that is only referenced once, this is an inlining hint e.g.: * status: migrated 1. ''__checkPassthroughRule__:'' !e.g.:this tests if a rule gets just passed through a ::= b b ::= "literal" <=> a ::= "literal" , which is better for EBNF * status: migrated 1. ''__checkEqualAlternative__:'' this tests if a rule got equal alternatives e.g.: a::= d | d status: still some problems * status: migrated 1. ''__checkDuplicateRules__:'' checks if there is another rule in the EtsiBnf, that got the same behaviour e.g.: a ::= "literal" | b c ::= "literal" | b * status: migrated 1. ''__checkSubruleDuplicates__:'' * status: not migrated 1. ''__check unused rule__:'' it checks if a rule is used (exept for the rule with the number 1) * status: migrated 1. ''__checkNameIsUnique__:'' checks if the nam of a rule is already in use e.g.: a ::= "end" a ::= "fin" * status: migrated == Generation: == Generating an intermediate xsl-fo representation for all BNF grammars (merge or delta grammars not supported). This can be rendered to PDF using apache-fop * status: in progress == Formatting: == * ''old:'' had some but they are got commented out in the main project * ''new:'' line-break after every rule, white-spaces after all literals, possible update linebreak and double tab after all >|< bars == Refactoring and Quick-fixing: == Automated restructuring support. 1. ''auto Numbering of rules'' * status: not migrated 1. ''remove unused rules'' * status: migrated 1. ''replacement of passthroughRules'' * status: not migrated 1. ''refactor uppercasetokenRules'' * status: not migrated 1. ''find references'' * status: provided by xtext2 1. ''renaming'' * status: provided by xtext2 == Grammar Composition: == - 3 grammartypes: - grammar: normal grammar - delta grammar: different notation for a extension grammar, - adds new rules to a grammar (regular rules) and adds changes to rules of the extended grammar (extension rules) (can be automatically created) - merge grammar: for merging extensions - old version had an automatic composition process for merge grammars with a small pop-up-menu. * at the moment no support in the new version == Deployment: == * export project as Plugin: Plug-in Development/deployable plug-ins and fragments * RCP project with a minimal eclipse editor: TBD