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Why are ANTLR files built in two different packages [message #1746056]

Thu, 20 October 2016 22:01

Larry Cousin

Messages: 15
Registered: September 2016

Junior Member

I am very novice with Xtext. I have observed, however, that when I "Generate Xtext Artifacts" for my <DSL>.xtext file that what appears to be the same ANTLR files are built in <DSL path>.src-gen.<DSL path>.parser.antlr.internal (and ...parser.antlr.lexer [because I am bactracking the lexer]). These same files are also in <DSL path>.ide.src-gen.<DSL path>.ide.contentassist.antlr.internal (and ... ide.contentassist.antlr.lexer).

Given the name "contentassist" in the path, I'm sure this has samething to do with that. Can someone tell me why these ANTLR files are duplicated and what "contentassist" is?

Thanks!

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Re: Why are ANTLR files built in two different packages [message #1746061 is a reply to message #1746056]

Fri, 21 October 2016 03:13

Christian Dietrich

Messages: 14491
Registered: July 2009

Senior Member

The content assist parser calculates possible follow up elements to be able to give content assist
The runtime parser calculates a ast

They do different things => two parsers

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