I was开发者_开发技巧 having difficulty figuring out what does ^ and ! stand for in ANTLR grammar terminology.Have a look at the ANTLR Cheat Sheet:
I’m trying to build a grammar that interprets user-entered text, search-engine style.It will support the AND, OR, NOT and ANDNOT Boolean operators.I have pretty much everything working, but I want to
I am trying to implement a nested comment in D. nestingBlockComment : \'/+\' (options {greedy=false;} :nestingBlo开发者_如何转开发ckCommentCharacters)* \'+/\' {$channel=HIDDEN;}; // line 58
Does anyone know anything about how Antlr works? I\'m getting an error on a dev server: [NullReferenceException: Object reference not set to an instance of an object.]
When I run the following grammer: test : WORD+; WORD : (\'a\'..\'z\')+; WS : \' \'+ {$channel = HIDDEN;};
I would like to parse a binary file and specify the characters in hex format instead of unicode, is thi开发者_运维问答s possible?
What is a semantic predicate开发者_开发百科 in ANTLR?ANTLR 4 For predicates in ANTLR 4, checkout these stackoverflow Q&A\'s:
In Antlr, if I have a rule for example: someRule : TOKENA TOKENB; it would accept : \"tokena tokenb\" if I would like TOKENA to be optional, I can say,
I have been trying for a few days to parse some text that consists of text and numbers (I\'ve called it a sentence in my grammar).
Grammar: grammar test; WS:( \' \' \'\\t\' \'\\r\' \'\\n\' ) {$channel=HIDDEN;} ; STRING :\'\"\' ( ESC_SEQ | ~(\'\\\\\'|\'\"\') )* \'\"\'
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